BASIC ENGINEERING -PAGE 2
BASIC ENGINEERING MCQs- PAGE 2
1:-The Amplitude of undammed Oscillation
A:-Decreases with time
B:-Increases with time
C:-Constant
D:-Zero
Ans: C
2:-The impedance of the parallel RLC circuit at Resonance is
A:-Maximum
B:-Minimum
C:-Zero
D:-Equal to DC resistance of the coil
Ans: A
3:-A series resonance circuit used to reject an undesired frequency is known as
A:-Wave guide
B:-Wave trap
C:-Band pass filter
D:-Band stop filter
Ans: B
4:-Which filters are used to block the 50 Hz hum produced by AC mains in Amplifiers?
A:-Low Pass
B:-High Pass
C:-Band Pass
D:-Band Stop
Ans: D
5:-Voltage follower circuits are used for
A:-Current amplification
B:-Voltage amplification
C:-To avoid loading effect of source
D:-All the above
Ans: C
6:-Which of the following is difficult to fabricate in an IC?
A:-Diode
B:-Resistor
C:-Transistor
D:-Choke
Ans: D
7:-The output impedance of an Op-Amp is about
A:-1 MΩ
B:-10 KΩ
C:-500 Ω
D:-50 Ω
Ans: D
8:-In Class B amplifier the Q point is Set Slightly above cut off. The purpose is to
A:-Avoid Cross over distortion
B:-Increase efficiency
C:-Reduce power dissipation
D:-Increase gain
Ans: A
9:-Velocity of sound in water/liquid compared to that of air is
A:-Less
B:-Either Less or More
C:-The Same
D:-More
Ans: D
10:-Specific Gravity of a fully charged Lead-Acid cell at room temperature will be
A:-1.15
B:-1.38
C:-1.835
D:-1.28
Ans: D
11:-The expression `bar{(ABC)}` can be simplified as
A:-`barA.barB.barC`
B:-`AB + BC + CA`
C:-`AB+barC`
D:-`barA+barB+barC`
Ans: D
12:-CMOS circuits are extensively used for One chip computers mainly because of their
A:-Low power dissipation
B:-Low cost
C:-High noise immunity
D:-Large packing density
Ans: D
13:-The principal disadvantage of a Piezo electric transducer is that it
A:-can measure only force
B:-cannot measure static conditions
C:-is too small to handle
D:-produces only DC voltage
Ans: B
14:-Total internal reflection can take place when light travels from
A:-air to glass
B:-glass to air
C:-rarer to a denser medium
D:-denser to a rarer medium
Ans: D
15:-The structure of an optical fibre consist of
A:-multimode step index
B:-graded index
C:-single mode step index
D:-all of the above
Ans: D
16:-Noise margin is expressed in
A:-Decibel
B:-Watt
C:-Volt
D:-Phon
Ans: C
17:-An X-OR gate produces an output only when its two inputs are
A:-high
B:-low
C:-different
D:-same
Ans: C
18:-In a JFET, `"I_{DSS}"` is known as
A:-Drain to source current
B:-Drain to source current with gate shorted
C:-Drain to source current with gate open
D:-None of the above
Ans: B
A:-Decreases with time
B:-Increases with time
C:-Constant
D:-Zero
Ans: C
2:-The impedance of the parallel RLC circuit at Resonance is
A:-Maximum
B:-Minimum
C:-Zero
D:-Equal to DC resistance of the coil
Ans: A
3:-A series resonance circuit used to reject an undesired frequency is known as
A:-Wave guide
B:-Wave trap
C:-Band pass filter
D:-Band stop filter
Ans: B
4:-Which filters are used to block the 50 Hz hum produced by AC mains in Amplifiers?
A:-Low Pass
B:-High Pass
C:-Band Pass
D:-Band Stop
Ans: D
5:-Voltage follower circuits are used for
A:-Current amplification
B:-Voltage amplification
C:-To avoid loading effect of source
D:-All the above
Ans: C
6:-Which of the following is difficult to fabricate in an IC?
A:-Diode
B:-Resistor
C:-Transistor
D:-Choke
Ans: D
7:-The output impedance of an Op-Amp is about
A:-1 MΩ
B:-10 KΩ
C:-500 Ω
D:-50 Ω
Ans: D
8:-In Class B amplifier the Q point is Set Slightly above cut off. The purpose is to
A:-Avoid Cross over distortion
B:-Increase efficiency
C:-Reduce power dissipation
D:-Increase gain
Ans: A
9:-Velocity of sound in water/liquid compared to that of air is
A:-Less
B:-Either Less or More
C:-The Same
D:-More
Ans: D
10:-Specific Gravity of a fully charged Lead-Acid cell at room temperature will be
A:-1.15
B:-1.38
C:-1.835
D:-1.28
Ans: D
11:-The expression `bar{(ABC)}` can be simplified as
A:-`barA.barB.barC`
B:-`AB + BC + CA`
C:-`AB+barC`
D:-`barA+barB+barC`
Ans: D
12:-CMOS circuits are extensively used for One chip computers mainly because of their
A:-Low power dissipation
B:-Low cost
C:-High noise immunity
D:-Large packing density
Ans: D
13:-The principal disadvantage of a Piezo electric transducer is that it
A:-can measure only force
B:-cannot measure static conditions
C:-is too small to handle
D:-produces only DC voltage
Ans: B
14:-Total internal reflection can take place when light travels from
A:-air to glass
B:-glass to air
C:-rarer to a denser medium
D:-denser to a rarer medium
Ans: D
15:-The structure of an optical fibre consist of
A:-multimode step index
B:-graded index
C:-single mode step index
D:-all of the above
Ans: D
16:-Noise margin is expressed in
A:-Decibel
B:-Watt
C:-Volt
D:-Phon
Ans: C
17:-An X-OR gate produces an output only when its two inputs are
A:-high
B:-low
C:-different
D:-same
Ans: C
18:-In a JFET, `"I_{DSS}"` is known as
A:-Drain to source current
B:-Drain to source current with gate shorted
C:-Drain to source current with gate open
D:-None of the above
Ans: B
19. The valve(s) closed during compression stroke of an IC engine is/are
A:-Inlet valve
B:-Exhaust valve
C:-Both inlet and exhaust valve
D:-None of the above
Correct Answer:- Option-C
20. The cooling tower in a steam thermal power plant is a device for
A:-Condensing steam into water
B:-Cooling exhaust gas coming out of a boiler
C:-Reducing temperature of superheated steam
D:-Reducing temperature of cooling water used in a condenser
Correct Answer:- Option-D
21. The role of a moderator in a nuclear power plant is
A:-To absorb neutrons fully
B:-To control speed of neutrons
C:-Both 1 and 2 above depending on the need
D:-None of the above
Correct Answer:- Option-B
22. The role of a surge tank in a hydroelectric power plant is
A:-To absorb sudden rises of pressure by storing water
B:-To store extra water during a brief drop of pressure
C:-Both 1 and 2 above
D:-To reduce the speed of the turbine when the level of dam is high
Correct Answer:- Option-C
23. The following system in automobile diverts the power at right angles towards the driving wheels
A:-Torque tube
B:-Transfer case
C:-Final drive
D:-Differential
Correct Answer:- Option-C
24. In a parallel RC electric circuit ________ is same for each element.
A:-current
B:-voltage
C:-power
D:-none of the above
Correct Answer:- Option-B
25. Across the surface of a charged conductor, the electric
A:-field is continuous
B:-potential is continuous
C:-field is discontinuous
D:-none of the above
Correct Answer:- Option-C
26. The unit of electric energy is
A:-ampere
B:-voltage
C:-watt
D:-watthour
Correct Answer:- Option-D
27. An alternating current source having voltage E = 220 sin (`omegat+Pi`/2) in an ac circuit . If the current draws from the circuit is I = 20 sin (`omegat-Pi`/2), the impedance of the circuit is
A:-11Ω
B:-15.6Ω
C:-30.8Ω
D:-none of the above
Correct Answer:- Option-A
28. Which one of the following is a direct band gap semiconductor used to fabricate light emitting diodes ?
A:-Germanium
B:-Silicon
C:-Gallium Arsenide
D:-Gold
Correct Answer:- Option-C
29. In a bridge rectifier circuit without filter, the maximum voltage across the secondary of the transformer is 18 volt. What is the maximum reverse voltage that appears across a diode in the non-conducting state during the rectification process ?
A:-0 volt
B:-18 volt
C:-9 volt
D:-36 volt
Correct Answer:- Option-B
30. Which of the following is a universal gate ?
A:-NAND gate
B:-OR gate
C:-NOT gate
D:-XOR gate
Correct Answer:- Option-A
31. What is the multiple access technique used in IS-95 digital cellular phone standard ?
A:-SDMA
B:-CDMA
C:-TDMA
D:-FDMA
Correct Answer:- Option-B
32. What is the size of RAM is 8051 micro controller ?
A:-32 bytes
B:-64 bytes
C:-8 bytes
D:-128 bytes
Correct Answer:- Option-D
33:-Which energy accounts for largest share in the renewable energy basket of India?
A:-Wind B:-Nuclear C:-Hydel D:-Solar
Ans: C
34:-Which type of turbine is commonly used in tidal energy?
A:-Francis turbine B:-Kaplan turbine C:-Pelton turbine D:-All the above
Ans: B
35:-The first mini hydel power plant in India was set up in 1897 at
A:-Shimla B:-Dehra Doon C:-Kulu D:-Darjeeling
Ans: D
36:-Which device is used to measure solar irradiance on a planar surface?
A:-Pyranometer B:-Radiometer C:-Gardon guage D:-All the above
Ans: A
37:-Photovoltaic energy is the conversion of sunlight into
A:-Chemical energy B:-Biogas C:-Electricity D:-Geothermal energy
Ans: A
38:-What is meaning of a Carbon Positive Area?
A:-Area with carbon emissions more than carbon sequestration
B:-Area with carbon emission balanced with carbon sequestration
C:-Area with carbon emission are zero
D:-Area with more renewable energy generation than needed to sustain the area
Ans: D
39:-For the first time, solar panels have been installed on which Indian warship?
A:-INS Viraat B:-INS Kaveri C:-INS Vikrant D:-INS Sarvekshak
Ans: D
40:-What can be produced from non edible oil seeds such as karanja, rubber seed, castor?
A:-Petrol B:-Natural gas C:-Methane D:-Biodiesel
Ans: D
41:-Two cylindrical vessels are connected at the bottom through a narrow tube of negligible volume. The diameters of vessels are in 2:3 ratio. The heights are in 3:2 ratio. If the total volume of the water contained in both the vessels amounts to 26L, the volumes in each vessel are
A:-8L, 18L B:-10.4L, 15.6L C:-12L, 14L D:-13L, 13L
Ans: A
42:-It takes 12 minutes to burn an 1m long coir rope completely, if it is burnt from the left end. And if burnt from the right end, it takes 24 minutes. The rope is burnt from both ends, and at the same time an ant starts to walk from one end of the rope at a speed of 1 centimeter per second. When the ant reaches the other burning end, it reverses direction, and keeps repeating that until it jumps out of the rope when it completely burns away. How much distance does the ant cover before it jumps out?
A:-1080 centimeters B:-720 centimeters C:-480 centimeters D:-100 centimeters
Ans: C
43:-After a common entrance exam, an institute would like to call everyone at or better than rank 500 for an interview. If 10000 candidates appeared for the exam, and the results are announced in percentile, what percentile should the institute set as the cut off? (Note: In a set of observations, a sample is at x percentile if x% of observations are below the score of the sample).
A:-99 B:-95 C:-91 D:-90
Ans: B
44:-What does OTEC stand for?
A:-Ocean Thermal Energy Cultivation B:-Ocean Thermal Energy Conversion
C:-Ocean Techno Energy Conservation D:-Ocean Thermal Energy Consumption
Ans: B
45:-Which of the following is a disadvantage of most of the renewable energy sources?
A:-Highly polluting B:-High waste disposal cost C:-Unrealiable supply D:-High running cost
Ans: C
46:-If the sum of two eigenvalues and trace of a 3 × 3 matrix A are equal, then the value of |A| is
A:--2 B:-0 C:-2 D:-1
Ans: B
47:-Moore's law is the observation that the number of transistors in an integrated circuit (IC) doubles about every two years. Currently, the largest transistor count in a commercially available single-chip processor is around 20 billion. Assuming Moore's law will hold, what is the largest transistor count that you expect to see one year from now?
A:-Around 25 billion B:-Around 28 billion
C:-Around 30 billion D:-Around 40 billion
Ans: B
48:-In a school with 100 students, 60 have studied French, 60 have studied German, and 60 have studied Spanish. What is the minimum number of students who will studied all the three above languages?
A:-0 B:-10 C:-20 D:-40
Ans: A
49:-An engineering college has an average first year pass-rate of 76.8 percent in 2018 (no rounding). You can conclude that the number of students from this college who wrote the first yer exam in 2018 is at least
A:-100 B:-125
C:-768 D:-1000
Ans: B
50:-How many feet of fast-moving flood water can sweep a vehicle away?
A:-3 feet B:-2 feet C:-4 feet D:-5 feet
Ans: B
A:-Inlet valve
B:-Exhaust valve
C:-Both inlet and exhaust valve
D:-None of the above
Correct Answer:- Option-C
20. The cooling tower in a steam thermal power plant is a device for
A:-Condensing steam into water
B:-Cooling exhaust gas coming out of a boiler
C:-Reducing temperature of superheated steam
D:-Reducing temperature of cooling water used in a condenser
Correct Answer:- Option-D
21. The role of a moderator in a nuclear power plant is
A:-To absorb neutrons fully
B:-To control speed of neutrons
C:-Both 1 and 2 above depending on the need
D:-None of the above
Correct Answer:- Option-B
22. The role of a surge tank in a hydroelectric power plant is
A:-To absorb sudden rises of pressure by storing water
B:-To store extra water during a brief drop of pressure
C:-Both 1 and 2 above
D:-To reduce the speed of the turbine when the level of dam is high
Correct Answer:- Option-C
23. The following system in automobile diverts the power at right angles towards the driving wheels
A:-Torque tube
B:-Transfer case
C:-Final drive
D:-Differential
Correct Answer:- Option-C
24. In a parallel RC electric circuit ________ is same for each element.
A:-current
B:-voltage
C:-power
D:-none of the above
Correct Answer:- Option-B
25. Across the surface of a charged conductor, the electric
A:-field is continuous
B:-potential is continuous
C:-field is discontinuous
D:-none of the above
Correct Answer:- Option-C
26. The unit of electric energy is
A:-ampere
B:-voltage
C:-watt
D:-watthour
Correct Answer:- Option-D
27. An alternating current source having voltage E = 220 sin (`omegat+Pi`/2) in an ac circuit . If the current draws from the circuit is I = 20 sin (`omegat-Pi`/2), the impedance of the circuit is
A:-11Ω
B:-15.6Ω
C:-30.8Ω
D:-none of the above
Correct Answer:- Option-A
28. Which one of the following is a direct band gap semiconductor used to fabricate light emitting diodes ?
A:-Germanium
B:-Silicon
C:-Gallium Arsenide
D:-Gold
Correct Answer:- Option-C
29. In a bridge rectifier circuit without filter, the maximum voltage across the secondary of the transformer is 18 volt. What is the maximum reverse voltage that appears across a diode in the non-conducting state during the rectification process ?
A:-0 volt
B:-18 volt
C:-9 volt
D:-36 volt
Correct Answer:- Option-B
30. Which of the following is a universal gate ?
A:-NAND gate
B:-OR gate
C:-NOT gate
D:-XOR gate
Correct Answer:- Option-A
31. What is the multiple access technique used in IS-95 digital cellular phone standard ?
A:-SDMA
B:-CDMA
C:-TDMA
D:-FDMA
Correct Answer:- Option-B
32. What is the size of RAM is 8051 micro controller ?
A:-32 bytes
B:-64 bytes
C:-8 bytes
D:-128 bytes
Correct Answer:- Option-D
33:-Which energy accounts for largest share in the renewable energy basket of India?
A:-Wind B:-Nuclear C:-Hydel D:-Solar
Ans: C
34:-Which type of turbine is commonly used in tidal energy?
A:-Francis turbine B:-Kaplan turbine C:-Pelton turbine D:-All the above
Ans: B
35:-The first mini hydel power plant in India was set up in 1897 at
A:-Shimla B:-Dehra Doon C:-Kulu D:-Darjeeling
Ans: D
36:-Which device is used to measure solar irradiance on a planar surface?
A:-Pyranometer B:-Radiometer C:-Gardon guage D:-All the above
Ans: A
37:-Photovoltaic energy is the conversion of sunlight into
A:-Chemical energy B:-Biogas C:-Electricity D:-Geothermal energy
Ans: A
38:-What is meaning of a Carbon Positive Area?
A:-Area with carbon emissions more than carbon sequestration
B:-Area with carbon emission balanced with carbon sequestration
C:-Area with carbon emission are zero
D:-Area with more renewable energy generation than needed to sustain the area
Ans: D
39:-For the first time, solar panels have been installed on which Indian warship?
A:-INS Viraat B:-INS Kaveri C:-INS Vikrant D:-INS Sarvekshak
Ans: D
40:-What can be produced from non edible oil seeds such as karanja, rubber seed, castor?
A:-Petrol B:-Natural gas C:-Methane D:-Biodiesel
Ans: D
41:-Two cylindrical vessels are connected at the bottom through a narrow tube of negligible volume. The diameters of vessels are in 2:3 ratio. The heights are in 3:2 ratio. If the total volume of the water contained in both the vessels amounts to 26L, the volumes in each vessel are
A:-8L, 18L B:-10.4L, 15.6L C:-12L, 14L D:-13L, 13L
Ans: A
42:-It takes 12 minutes to burn an 1m long coir rope completely, if it is burnt from the left end. And if burnt from the right end, it takes 24 minutes. The rope is burnt from both ends, and at the same time an ant starts to walk from one end of the rope at a speed of 1 centimeter per second. When the ant reaches the other burning end, it reverses direction, and keeps repeating that until it jumps out of the rope when it completely burns away. How much distance does the ant cover before it jumps out?
A:-1080 centimeters B:-720 centimeters C:-480 centimeters D:-100 centimeters
Ans: C
43:-After a common entrance exam, an institute would like to call everyone at or better than rank 500 for an interview. If 10000 candidates appeared for the exam, and the results are announced in percentile, what percentile should the institute set as the cut off? (Note: In a set of observations, a sample is at x percentile if x% of observations are below the score of the sample).
A:-99 B:-95 C:-91 D:-90
Ans: B
44:-What does OTEC stand for?
A:-Ocean Thermal Energy Cultivation B:-Ocean Thermal Energy Conversion
C:-Ocean Techno Energy Conservation D:-Ocean Thermal Energy Consumption
Ans: B
45:-Which of the following is a disadvantage of most of the renewable energy sources?
A:-Highly polluting B:-High waste disposal cost C:-Unrealiable supply D:-High running cost
Ans: C
46:-If the sum of two eigenvalues and trace of a 3 × 3 matrix A are equal, then the value of |A| is
A:--2 B:-0 C:-2 D:-1
Ans: B
47:-Moore's law is the observation that the number of transistors in an integrated circuit (IC) doubles about every two years. Currently, the largest transistor count in a commercially available single-chip processor is around 20 billion. Assuming Moore's law will hold, what is the largest transistor count that you expect to see one year from now?
A:-Around 25 billion B:-Around 28 billion
C:-Around 30 billion D:-Around 40 billion
Ans: B
48:-In a school with 100 students, 60 have studied French, 60 have studied German, and 60 have studied Spanish. What is the minimum number of students who will studied all the three above languages?
A:-0 B:-10 C:-20 D:-40
Ans: A
49:-An engineering college has an average first year pass-rate of 76.8 percent in 2018 (no rounding). You can conclude that the number of students from this college who wrote the first yer exam in 2018 is at least
A:-100 B:-125
C:-768 D:-1000
Ans: B
50:-How many feet of fast-moving flood water can sweep a vehicle away?
A:-3 feet B:-2 feet C:-4 feet D:-5 feet
Ans: B
51:-What is the core concept that speeds up vehicles in hyperloop transportation?
A:-Use of better insulators B:-Reduction of drag C:-Automated driving D:-Use of Rocket fuels
Ans: B
52:-What is the core idea in "Edge computing"?
A:-Process data at a centralised server B:-Upsupervised machine learning
C:-Use a neural network to process data D:-Process data close to where it is created
Ans: D
53:-Block Chain
A:-Is built using the principle of MapReduce programming B:-Enables horizontal scaling of data storage infrastructure
C:-Utilises the principle of cryptographic hashing D:-Both (2) and (3)
Ans: D
54:-What among the following is the biggest challenge today in making a manned space mission to Mars or the distant planets?
A:-More efficient propulsion systems B:-Atomic clocks with better stability
C:-Physiological and psychological adaptability D:-Solar cells with more efficiency
Ans: A
55:-Which is the odd one among these : VTOL, Dronecode, Cryogenics, GNSS, Gyro stabilisation?
A:-VTOL B:-Cryogenics C:-Dronecode D:-Gyro stabilisation
Ans: B
56:-What best describes 'bionics'?
A:-Biology-inspired computing algorithms B:-Mechanical systems that function like living organisms
C:-Self-checking electronic circuits D:-Effects of supersonic travel on human body
Ans: B
57:-Which among the following is the most challenging in designing avionics for inter-planetary missions?
A:-Radiation protection B:-Speed of computation
C:-Cost D:-Multitasking
Ans: A
58:-Moore's law had predicted the rate of growth of computing power. Which among the following is not one of the technologies which may ensure more computing power in the future?
A:-Cold computing B:-Compound semiconductors C:-Quantum computing D:-Wireless computing
Ans: D
59:-What best describes the peak data rates targeted to be achieved in 5G mobile communication technology?
A:-5 Gbit/sec B:-10 Gbit/sec
C:-20 Gbit/sec D:-50 Gbit/sec
Ans: C
60:-Ram told Rahim, "If you give me half of your money, I will then have Rs. 75". Rahim told Ram, "If you give me two-thirds of your money, I will then have Rs. 70". How much should one give to the other so that both of them will have the same amount?
A:-Ram to Rahim, Rs. 15 B:-Rahim to Ram, Rs. 15 C:-Ram to Rahim, Rs. 30 D:-Rahim to Ram, Rs. 30
Ans: A
61:-Time is 11.20 AM. The angle between needles is
A:-145° B:-140° C:-135° D:-130°
Ans: B
62:-Four balls labelled as B1, B2, B3, B4 are placed uniformly at random in three pots labelled as P1, P2 and P3. What is the chance that no pot remains empty? (Note : The chance of an event is compound as the ratio of the number of favourable configurations for that event to the total number of configurations).
A:-`(11)/(16)` B:-`(9)/(16)` C:-`(7)/(16)` D:-`(5)/(16)`
Ans: C
63:-A toothed wheel of radius 20 cm is attached to a smaller wheel of radius 15 cm. How many revolutions does the smaller wheel make when the larger one makes 3 revolutions?
A:-`2(1)/(5)` B:-3 C:-`3(1)/(2)` D:-4
Ans: D
64:-Gudgeon pin forms the link between
A:-Piston and big end of connecting rod B:-Piston and small end of connecting rod
C:-Connecting rod and crank D:-Big end and small end of connecting rod
Ans: B
65:-Piston rings are usually made of
A:-Cast Iron B:-Aluminium C:-Phosphor bronze D:-Carbon steel
Ans: A
66:-Which is not the feature of a petrol engine when compared with a diesel engine?
A:-light construction and low initial cost B:-greater noise and vibration
C:-requires less maintenance D:-greater risk of fire
Ans: B
67:-The most commonly used moderator in nuclear power plant is
A:-heavy water B:-concrete and brick C:-steel D:-graphite
Ans: A
68. A closed system is one in which
(A) mass does not cross boundaries of the system, though energy may do so
(B) mass crosses the boundary but not the energy
(C) neither mass nor energy crosses the boundaries of the system
(D) both energy and mass cross the boundaries of the system
Ans: A
69. Intensive property of a system is one whose value
(A) depends on the mass of the system, like volume (B) does not depend on the mass of the system, like temperature, pressure, etc.
(C) is not dependent on the path followed but on the state (D) is dependent on the path followed and not on the state
Ans: B
70. The basis for measuring thermodynamic property of temperature is given by
(A) zeroth law of thermodynamics (B) first law of thermodynamics (C) second law of thermodynamics (D) third law of thermodynamics
Ans: A
71. For which of the following substances, the gas laws can be used with minimum error
(A) saturated ammonia (B) wet steam (C) saturated steam (D) superheated steam
Ans: D
72. Thermal power plant works on
(A) Carnot cycle (B) Joule cycle (C) Rankine cycle (D) Otto cycle
Ans: C
73. Otto cycle consists of following four processes
(A) two isothermals and two isentropics (B) two isentropics and two constant volumes
(C) two isentropics, one constant volume and one constant pressure (D) two isentropics and two constant pressures
Ans: B
74. Reversed Joule cycle is called
(A) Carnot cycle (B) Rankine cycle (C) Brayton cycle (D) Bell Coleman cycle
Ans: D
75. The three components of the primary ignition circuit of battery ignition system are
(A) The contact breaker, condenser and distributor cap (B) The contact breaker, ignition coil and spark plug
(C) The contact breaker, ignition switch and condenser (D) None of the options
Ans: C
76. The electrical wires are specified by
(A) The colour and length (B) The length and diameter (C) The number and size of strands (D) The colour and diameter
Ans: C
77. According to Dalton’s law, the total pressure of the mixture of gases is equal to
(A) greater of the partial pressures of all (B) average of the partial pressures of all
(C) sum of the partial pressures of all (D) sum of the partial pressures of all divided by average molecular weightAns: C
78. Property of a fluid by which its own molecules are attracted is called
(A) adhesion (B) cohesion (C) viscosity (D) compressibility
Ans: B
79. Mercury does not wet glass. This is due to property of liquid known as
(A) adhesion (B) cohesion (C) surface tension (D) viscosity
Ans: C
80. The property of fluid by virtue of which it offers resistance to shear is called
(A) surface tension (B) adhesion (C) cohesion (D) viscosity
Ans: D
81. According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as
(A) temperature (B) absolute (C) absolute temperature, if volume is kept constant (D) volume, if temperature is kept constant
Ans: C
82. If N kinematic links are connected at a same pin joint in a kinematic chain, the joint is equivalent of
(A) (N-1) binary joints (B) (N-2) binary joints (C) (2N-3) binary joints (D) (2N-1) binary joints
Ans: A
83. Unconstrained rigid link in plane has
(A) One degree of freedom (B) Zero degree of freedom (C) Three degree of freedom (D) Two degree of freedom
Ans: C
84. An expendable pattern is used in
(A) Slush casting (B) Squeeze casting (C) Centrifugal casting (D) Investment castingAns: D
85. Which one of the following is a solid state joining process?
(A) Gas tungsten arc welding (B) Shielded metal arc welding (C) Friction welding (D) Submerged arc welding
Ans: C
86. A twist drill is a
(A) Side cutting tool (B) Front cutting tool (C) End cutting tool (D) None of these
Ans: C
87. Cast iron during machining produces
(A) Continuous chips (B) Discontinuous chips (C) Continuous chips with built-up edge (D) None of these
Ans: B
88. The drill spindles are provided with standard taper known as
(A) Morse taper (B) Seller’s taper (C) Chapman taper (D) Brown and Sharpe taper
Ans: A
89. Blowholes in sand casting are caused by
(A) poor casting design (B) lower strength of solidified metal (C) high moisture content in the moulding sand (D) faulty moulding flask
Ans: C
90. A chaplet is used in a sand mould to:
(A) support the core during the molten metal pouring (B) support the mould from breaking
(C) prevent the occurrence of cold shuts (D) draw the pattern out
Ans: A
91. In DC arc welding, the major portion of heat is concentrated at:
(A) Always at the filler rod (B) Positive terminal (C) Negative terminal (D) Always at the workpiece
Ans: B
92. The creep is a phenomenon of failure observed for components used at high temperature such as gas turbine blades. The strength of the component for such application may be improved by:
(A) Adding more carbon (B) By using heat treatment known as quenching (C) Avoiding multiple grains (D) Using work hardening process
Ans: C
93. Parting line in sand casting should be according to the following guideline.
(A) There is no need of any specific guideline (B) It has to be simple and straight
(C) Irregular parting line to be used as it decreases casting cost (D) Multiple parting lines to be used as it decreases casting cost
Ans: B
94. Cold working of steel is defined as working
(A) Below 100 degree C (B) Below 0 degree C
(C) Below recrystallization temperature (D) Below melting temperature of the metal
Ans: C
95. By using synchronizing device in gear box, the two adjacent gears/dog clutches have their speeds
(A) Increased (B) Equalized (C) Reduced (D) Unequalized
Ans: B
96. Which of the following cycles uses air as the refrigerant?
(A) Ericsson (B) Stirling (C) Carnot (D) Bell-coleman
Ans: D
97. Ammonia-absorption refrigeration cycle requires
(A) very little work input (B) maximum work input (C) nearly same work input as for vapour compression cycle (D) zero work input
Ans: A
98. In vapour compression cycle the condition of refrigerant is superheated vapour
(A) after passing through the condenser (B) before passing through the condenser
(C) after passing through the expansion or throttle valve (D) before entering the expansion valve
Ans: B
99. The vapour compression refrigerator employs the following cycle
(A) Rankine (B) Carnot (C) Reversed Rankine (D) Reversed Carnot.
Ans: C
100. Refrigeration in aeroplanes usually employs the following refrigerant
(A) CO2 (B) Freon-11 (C) Freon-22 (D) Air
Ans: D
A:-Use of better insulators B:-Reduction of drag C:-Automated driving D:-Use of Rocket fuels
Ans: B
52:-What is the core idea in "Edge computing"?
A:-Process data at a centralised server B:-Upsupervised machine learning
C:-Use a neural network to process data D:-Process data close to where it is created
Ans: D
53:-Block Chain
A:-Is built using the principle of MapReduce programming B:-Enables horizontal scaling of data storage infrastructure
C:-Utilises the principle of cryptographic hashing D:-Both (2) and (3)
Ans: D
54:-What among the following is the biggest challenge today in making a manned space mission to Mars or the distant planets?
A:-More efficient propulsion systems B:-Atomic clocks with better stability
C:-Physiological and psychological adaptability D:-Solar cells with more efficiency
Ans: A
55:-Which is the odd one among these : VTOL, Dronecode, Cryogenics, GNSS, Gyro stabilisation?
A:-VTOL B:-Cryogenics C:-Dronecode D:-Gyro stabilisation
Ans: B
56:-What best describes 'bionics'?
A:-Biology-inspired computing algorithms B:-Mechanical systems that function like living organisms
C:-Self-checking electronic circuits D:-Effects of supersonic travel on human body
Ans: B
57:-Which among the following is the most challenging in designing avionics for inter-planetary missions?
A:-Radiation protection B:-Speed of computation
C:-Cost D:-Multitasking
Ans: A
58:-Moore's law had predicted the rate of growth of computing power. Which among the following is not one of the technologies which may ensure more computing power in the future?
A:-Cold computing B:-Compound semiconductors C:-Quantum computing D:-Wireless computing
Ans: D
59:-What best describes the peak data rates targeted to be achieved in 5G mobile communication technology?
A:-5 Gbit/sec B:-10 Gbit/sec
C:-20 Gbit/sec D:-50 Gbit/sec
Ans: C
60:-Ram told Rahim, "If you give me half of your money, I will then have Rs. 75". Rahim told Ram, "If you give me two-thirds of your money, I will then have Rs. 70". How much should one give to the other so that both of them will have the same amount?
A:-Ram to Rahim, Rs. 15 B:-Rahim to Ram, Rs. 15 C:-Ram to Rahim, Rs. 30 D:-Rahim to Ram, Rs. 30
Ans: A
61:-Time is 11.20 AM. The angle between needles is
A:-145° B:-140° C:-135° D:-130°
Ans: B
62:-Four balls labelled as B1, B2, B3, B4 are placed uniformly at random in three pots labelled as P1, P2 and P3. What is the chance that no pot remains empty? (Note : The chance of an event is compound as the ratio of the number of favourable configurations for that event to the total number of configurations).
A:-`(11)/(16)` B:-`(9)/(16)` C:-`(7)/(16)` D:-`(5)/(16)`
Ans: C
63:-A toothed wheel of radius 20 cm is attached to a smaller wheel of radius 15 cm. How many revolutions does the smaller wheel make when the larger one makes 3 revolutions?
A:-`2(1)/(5)` B:-3 C:-`3(1)/(2)` D:-4
Ans: D
64:-Gudgeon pin forms the link between
A:-Piston and big end of connecting rod B:-Piston and small end of connecting rod
C:-Connecting rod and crank D:-Big end and small end of connecting rod
Ans: B
65:-Piston rings are usually made of
A:-Cast Iron B:-Aluminium C:-Phosphor bronze D:-Carbon steel
Ans: A
66:-Which is not the feature of a petrol engine when compared with a diesel engine?
A:-light construction and low initial cost B:-greater noise and vibration
C:-requires less maintenance D:-greater risk of fire
Ans: B
67:-The most commonly used moderator in nuclear power plant is
A:-heavy water B:-concrete and brick C:-steel D:-graphite
Ans: A
68. A closed system is one in which
(A) mass does not cross boundaries of the system, though energy may do so
(B) mass crosses the boundary but not the energy
(C) neither mass nor energy crosses the boundaries of the system
(D) both energy and mass cross the boundaries of the system
Ans: A
69. Intensive property of a system is one whose value
(A) depends on the mass of the system, like volume (B) does not depend on the mass of the system, like temperature, pressure, etc.
(C) is not dependent on the path followed but on the state (D) is dependent on the path followed and not on the state
Ans: B
70. The basis for measuring thermodynamic property of temperature is given by
(A) zeroth law of thermodynamics (B) first law of thermodynamics (C) second law of thermodynamics (D) third law of thermodynamics
Ans: A
71. For which of the following substances, the gas laws can be used with minimum error
(A) saturated ammonia (B) wet steam (C) saturated steam (D) superheated steam
Ans: D
72. Thermal power plant works on
(A) Carnot cycle (B) Joule cycle (C) Rankine cycle (D) Otto cycle
Ans: C
73. Otto cycle consists of following four processes
(A) two isothermals and two isentropics (B) two isentropics and two constant volumes
(C) two isentropics, one constant volume and one constant pressure (D) two isentropics and two constant pressures
Ans: B
74. Reversed Joule cycle is called
(A) Carnot cycle (B) Rankine cycle (C) Brayton cycle (D) Bell Coleman cycle
Ans: D
75. The three components of the primary ignition circuit of battery ignition system are
(A) The contact breaker, condenser and distributor cap (B) The contact breaker, ignition coil and spark plug
(C) The contact breaker, ignition switch and condenser (D) None of the options
Ans: C
76. The electrical wires are specified by
(A) The colour and length (B) The length and diameter (C) The number and size of strands (D) The colour and diameter
Ans: C
77. According to Dalton’s law, the total pressure of the mixture of gases is equal to
(A) greater of the partial pressures of all (B) average of the partial pressures of all
(C) sum of the partial pressures of all (D) sum of the partial pressures of all divided by average molecular weightAns: C
78. Property of a fluid by which its own molecules are attracted is called
(A) adhesion (B) cohesion (C) viscosity (D) compressibility
Ans: B
79. Mercury does not wet glass. This is due to property of liquid known as
(A) adhesion (B) cohesion (C) surface tension (D) viscosity
Ans: C
80. The property of fluid by virtue of which it offers resistance to shear is called
(A) surface tension (B) adhesion (C) cohesion (D) viscosity
Ans: D
81. According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as
(A) temperature (B) absolute (C) absolute temperature, if volume is kept constant (D) volume, if temperature is kept constant
Ans: C
82. If N kinematic links are connected at a same pin joint in a kinematic chain, the joint is equivalent of
(A) (N-1) binary joints (B) (N-2) binary joints (C) (2N-3) binary joints (D) (2N-1) binary joints
Ans: A
83. Unconstrained rigid link in plane has
(A) One degree of freedom (B) Zero degree of freedom (C) Three degree of freedom (D) Two degree of freedom
Ans: C
84. An expendable pattern is used in
(A) Slush casting (B) Squeeze casting (C) Centrifugal casting (D) Investment castingAns: D
85. Which one of the following is a solid state joining process?
(A) Gas tungsten arc welding (B) Shielded metal arc welding (C) Friction welding (D) Submerged arc welding
Ans: C
86. A twist drill is a
(A) Side cutting tool (B) Front cutting tool (C) End cutting tool (D) None of these
Ans: C
87. Cast iron during machining produces
(A) Continuous chips (B) Discontinuous chips (C) Continuous chips with built-up edge (D) None of these
Ans: B
88. The drill spindles are provided with standard taper known as
(A) Morse taper (B) Seller’s taper (C) Chapman taper (D) Brown and Sharpe taper
Ans: A
89. Blowholes in sand casting are caused by
(A) poor casting design (B) lower strength of solidified metal (C) high moisture content in the moulding sand (D) faulty moulding flask
Ans: C
90. A chaplet is used in a sand mould to:
(A) support the core during the molten metal pouring (B) support the mould from breaking
(C) prevent the occurrence of cold shuts (D) draw the pattern out
Ans: A
91. In DC arc welding, the major portion of heat is concentrated at:
(A) Always at the filler rod (B) Positive terminal (C) Negative terminal (D) Always at the workpiece
Ans: B
92. The creep is a phenomenon of failure observed for components used at high temperature such as gas turbine blades. The strength of the component for such application may be improved by:
(A) Adding more carbon (B) By using heat treatment known as quenching (C) Avoiding multiple grains (D) Using work hardening process
Ans: C
93. Parting line in sand casting should be according to the following guideline.
(A) There is no need of any specific guideline (B) It has to be simple and straight
(C) Irregular parting line to be used as it decreases casting cost (D) Multiple parting lines to be used as it decreases casting cost
Ans: B
94. Cold working of steel is defined as working
(A) Below 100 degree C (B) Below 0 degree C
(C) Below recrystallization temperature (D) Below melting temperature of the metal
Ans: C
95. By using synchronizing device in gear box, the two adjacent gears/dog clutches have their speeds
(A) Increased (B) Equalized (C) Reduced (D) Unequalized
Ans: B
96. Which of the following cycles uses air as the refrigerant?
(A) Ericsson (B) Stirling (C) Carnot (D) Bell-coleman
Ans: D
97. Ammonia-absorption refrigeration cycle requires
(A) very little work input (B) maximum work input (C) nearly same work input as for vapour compression cycle (D) zero work input
Ans: A
98. In vapour compression cycle the condition of refrigerant is superheated vapour
(A) after passing through the condenser (B) before passing through the condenser
(C) after passing through the expansion or throttle valve (D) before entering the expansion valve
Ans: B
99. The vapour compression refrigerator employs the following cycle
(A) Rankine (B) Carnot (C) Reversed Rankine (D) Reversed Carnot.
Ans: C
100. Refrigeration in aeroplanes usually employs the following refrigerant
(A) CO2 (B) Freon-11 (C) Freon-22 (D) Air
Ans: D