MECHANICAL ENGINEERING- PAGE 20
Mechanical Engineering MCQs- Page 20
1. Combustion knock in a CI engine is generally known as: (A) Diesel knock (B) Diesel lock (C) Both (A) and (B) (D) Detonation
Ans: A
2. Which of the following are provided to the crank shaft to the balancing of main journals? (A) crank arm (B) vibration damper (C) crank weight (D) crank pulley
Ans: C
3. To improve the resistance to wear and corrosion, cylinder liners are plated with: (A) platinum (B) vanadium (C) zinc (D) chromium
Ans: D
4. Tendency of fuel to change from liquid to vapor form is called: (A) pour point (B) volatility (C) viscosity (D) flash point
Ans: B
5. Piston rings and cylinder liners are:
(A) Die casted
(B) Hollow casted
(C) Sand casted
(D) Centrifugal casted
Ans: D
6. The leaking of the combustion charges to the crank case is known as: (A) blow-by (B) by pass (C) dilution (D) scavenging
Ans: A
7. Find the odd one : (A) Piston pin (B) Wrist pin (C) Crank pin (D) Gudgeon pin
Ans: C
8. Double row side valve mechanism incorporated with a: (A) H-head engine (B) L-head engine (C) F-head engine (D) T-head engine
Ans: D
9. The term harmonic balancer is used instead of: (A) fly wheel (B) crank shaft (C) vibration damper (D) none of these
Ans: C
10. T- slot provided in the piston: (A) To accommodate the expansion of piston when heated up (B) For cooling purpose (C) To reduce piston weight (D) For the passage of oil
Ans: A
11. Brake power of an engine is measured with a: (A) vacuum gauge (B) dynamo meter (C) taco meter (D) oscilloscope
Ans: B
12. If the resultant of forces acting on a body is zero, the body: (A) is in equilibrium (B) is moving with non uniform velocity (C) is not in equilibrium (D) none of the above
Ans: A
13. The unit of force in C.G.S. system of units, is called: (A) Dyne (B) Kg (C) Newton (D) All the above
Ans: A
14. The Length : Width in case of an arrow head is: (A) 1:1 (B) 2:1 (C) 3:1 (D) 4:1
Ans: C
15. The ability of engine bearings to accommodates small variation in shaft is its: (A) Embadability (B) Conformability (C) Adaptability (D) Fatigue strength
Ans: B
16. The resultant of two equal forces P making an angle 2 θ is given by: (A) 2Psin θ (B) 2Ptan θ
(C) 2Pcos θ (D) 2Pcot θ
Ans: C
17. The rate of doing work is known as: (A) Power (B) Potential energy (C) Kinetic energy (D) None of the above
Ans: A
18. The total energy possessed by a system of moving bodies: (A) Is constant at every instant (B) Varies from point to point (C) Is maximum in the start (D) None of the above
Ans: A
19. If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is moving downwards, the acceleration of the lift, is: (A) g/2 (B) g/4 (C) g/3 (D) g/5
Ans: C
20. In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN.The velocity ratio of the machine is : (A) 30 (B) 60 (C) 80 (D) 50
Ans: D
21. Which of the following represent reducing scale?
(A) 1:1 (B) 2:1 (C) 1:2 (D) 10:1
Ans: C
22. The following line is used for dimension line:
(A) Continuous thick (B) Chain thin line (C) Continuous thin (D) Short zigzag thin
Ans: C
23. The front view of a rectangle, when its plane is parallel to HP and perpendicular to VP, is:
(A) Rectangle (B) Line (C) Square (D) Point
Ans: B
24. The following are the Polyhedron except:
(A) Prism (B) Cube (C) Pyramid (D) Cylinder
Ans: D
25. The following are the solids of revolution except:
(A) Prism (B) Cone (C) Sphere (D) Cylinder
Ans: A
26. The top view of a right cylinder resting on HP on its base rim is :
(A) Ellipse (B) Rectangle (C) Circle (D) Square
Ans: C
27. The following is formed by revolving rectangle about one of its sides which remains fixed:
(A) cylinder (B) hemi sphere (C) sphere (D) cone
Ans: A
28. The sectional plane are represented by :
(A) Continuous thick line (B) Chain thin line (C) Continuous thin line (D) Chain thin line having thick edges
Ans: D
29. The dotted lines represents:
(A) hidden edges (B) centre line (C) projection line (D) hatching line
Ans: A
30. A tetrahedron has four equal ——————— faces.
(A) square (B) triangular (C) rectangular (D) circular
Ans: B
31. In first angle projection method, object is assumed to be placed in:
(A) First quadrant (B) Third quadrant (C) Second quadrant (D) Fourth quadrant
Ans: A
32. The internal angle of regular hexagon is ——————— degree.
(A) 72
(B) 120
(C) 108
(D) 150
Ans: B
33. A right regular hexagonal prism in resting on HP on its base, its top view is a. (A) square (B) hexagon (C) rectangle (D) pentagon
Ans: B
34. The following is the method for development of a sphere: (A) Parallel line method (B) Triangulation method (C) Radial line method (D) Approximate method
Ans: D
35. If 'P' is the Ratio of inside to outside diameter of a shaft, the ratio of torque carrying capacity of solid shaft to that of hollow shaft is given by
A:-`(1-P^4)^(-1)`
B:-`1-P^4`
C:-`P^4`
D:-`(1)/(P^4)`
Ans: A
36. Angle of helix in a closed coiled spring is
A:-<100
B:->100
C:-=100
D:-None
Ans: A
37. For the same maximum pressure and temperature of Otto, Diesel and dual combustion air standard cycles
A:-The compression ratio will be same
B:-Heat supplied to the cycles will be same
C:-Air standard efficiency will have same value
D:-Heat rejected by the engine will be same
Ans: D
38. Critical thickness of insulation for sphere is given by [k `->` thermal conductivity, h `->` heat transfer coefficient]
A:-`k//h`
B:-`(k)/(4Pih)`
C:-`(h)/(2k)`
D:-`(2k)/(h)`
Ans: D
39. In a certain Heat exchanger, both fluids have identical mass flow rate -sp. heat product. The hotfluid enters at 76°C and leaves at 47°C and cold fluid enters at 26°C and leaves at 55°C. The effectiveness of heat exchanger is
A:-0.16
B:-0.58
C:-0.72
D:-1.0
Ans: B
40. When ammonia is used as Refrigerant, the recommended material used for Refrigerant lines are
A:-Copper
B:-Aluminium
C:-Steel
D:-Brass
Ans: C
41. Which type of compressor mostly used in supercharger of internal combustion engines ?
A:-Roots blower
B:-Axial flow compressor
C:-Redial flow compressor
D:-Reciprocating compressor
Ans: C
42. Thermostatic expansion valves are set mostly for a super heat of
A:-5°C
B:-10°C
C:-15°C
D:-20°C
Ans: A
43. In a Refrigeration system with multiple evaporators at different temperature with compound compression and flash intercooler, the suction vapour to the high pressure stage is
A:-Wet state
B:-Dry saturated
C:-Super heated
D:-Saturated liquid
Ans: B
44. The supply air state of cooling coil with a bypass factor (BPF) lies at
A:-Intersection of RSHF line with saturation curve
B:-Intersection of GSHF line with saturation curve
C:-Point dividing RSHF line in proportion of BPF and (1-BPF)
D:-Intersection of RSHF line and GSHF line
Ans: D
45. The degree of warmth or cold felt by a human body depends mainly on
A:-DBT
B:-Relative humidity
C:-Air velocity
D:-All of the above
Ans: D
46. Petrol Enginer has compression ratio from
A:-6 to 10
B:-10 to 15
C:-15 to 25
D:-25 to 40
Ans: A
47. Which of the following is not included under the definition of wages given under the payment of wages Act, 1936 ?
A:-Basic wage
B:-Dearness Allowance
C:-Gratuity
D:-Incentive
Ans: C
48. Shadow price in linear programming refers to the
A:-lowest sales price
B:-maximum cost per item
C:-value assigned to one unit
D:-cost of bought out items
Ans: C
49. Which of the following stock valuation methods is based on a cost estimate made before the part is purchased?
A:-FIFO
B:-WFO
C:-Standard costing
D:-Average costing
Ans: C
50. Vehicle manufacturing assembly line is an example of
A:-Product layout
B:-Process layout
C:-Group layout
D:-Fixed position layout
Ans: A
Ans: A
2. Which of the following are provided to the crank shaft to the balancing of main journals? (A) crank arm (B) vibration damper (C) crank weight (D) crank pulley
Ans: C
3. To improve the resistance to wear and corrosion, cylinder liners are plated with: (A) platinum (B) vanadium (C) zinc (D) chromium
Ans: D
4. Tendency of fuel to change from liquid to vapor form is called: (A) pour point (B) volatility (C) viscosity (D) flash point
Ans: B
5. Piston rings and cylinder liners are:
(A) Die casted
(B) Hollow casted
(C) Sand casted
(D) Centrifugal casted
Ans: D
6. The leaking of the combustion charges to the crank case is known as: (A) blow-by (B) by pass (C) dilution (D) scavenging
Ans: A
7. Find the odd one : (A) Piston pin (B) Wrist pin (C) Crank pin (D) Gudgeon pin
Ans: C
8. Double row side valve mechanism incorporated with a: (A) H-head engine (B) L-head engine (C) F-head engine (D) T-head engine
Ans: D
9. The term harmonic balancer is used instead of: (A) fly wheel (B) crank shaft (C) vibration damper (D) none of these
Ans: C
10. T- slot provided in the piston: (A) To accommodate the expansion of piston when heated up (B) For cooling purpose (C) To reduce piston weight (D) For the passage of oil
Ans: A
11. Brake power of an engine is measured with a: (A) vacuum gauge (B) dynamo meter (C) taco meter (D) oscilloscope
Ans: B
12. If the resultant of forces acting on a body is zero, the body: (A) is in equilibrium (B) is moving with non uniform velocity (C) is not in equilibrium (D) none of the above
Ans: A
13. The unit of force in C.G.S. system of units, is called: (A) Dyne (B) Kg (C) Newton (D) All the above
Ans: A
14. The Length : Width in case of an arrow head is: (A) 1:1 (B) 2:1 (C) 3:1 (D) 4:1
Ans: C
15. The ability of engine bearings to accommodates small variation in shaft is its: (A) Embadability (B) Conformability (C) Adaptability (D) Fatigue strength
Ans: B
16. The resultant of two equal forces P making an angle 2 θ is given by: (A) 2Psin θ (B) 2Ptan θ
(C) 2Pcos θ (D) 2Pcot θ
Ans: C
17. The rate of doing work is known as: (A) Power (B) Potential energy (C) Kinetic energy (D) None of the above
Ans: A
18. The total energy possessed by a system of moving bodies: (A) Is constant at every instant (B) Varies from point to point (C) Is maximum in the start (D) None of the above
Ans: A
19. If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is moving downwards, the acceleration of the lift, is: (A) g/2 (B) g/4 (C) g/3 (D) g/5
Ans: C
20. In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN.The velocity ratio of the machine is : (A) 30 (B) 60 (C) 80 (D) 50
Ans: D
21. Which of the following represent reducing scale?
(A) 1:1 (B) 2:1 (C) 1:2 (D) 10:1
Ans: C
22. The following line is used for dimension line:
(A) Continuous thick (B) Chain thin line (C) Continuous thin (D) Short zigzag thin
Ans: C
23. The front view of a rectangle, when its plane is parallel to HP and perpendicular to VP, is:
(A) Rectangle (B) Line (C) Square (D) Point
Ans: B
24. The following are the Polyhedron except:
(A) Prism (B) Cube (C) Pyramid (D) Cylinder
Ans: D
25. The following are the solids of revolution except:
(A) Prism (B) Cone (C) Sphere (D) Cylinder
Ans: A
26. The top view of a right cylinder resting on HP on its base rim is :
(A) Ellipse (B) Rectangle (C) Circle (D) Square
Ans: C
27. The following is formed by revolving rectangle about one of its sides which remains fixed:
(A) cylinder (B) hemi sphere (C) sphere (D) cone
Ans: A
28. The sectional plane are represented by :
(A) Continuous thick line (B) Chain thin line (C) Continuous thin line (D) Chain thin line having thick edges
Ans: D
29. The dotted lines represents:
(A) hidden edges (B) centre line (C) projection line (D) hatching line
Ans: A
30. A tetrahedron has four equal ——————— faces.
(A) square (B) triangular (C) rectangular (D) circular
Ans: B
31. In first angle projection method, object is assumed to be placed in:
(A) First quadrant (B) Third quadrant (C) Second quadrant (D) Fourth quadrant
Ans: A
32. The internal angle of regular hexagon is ——————— degree.
(A) 72
(B) 120
(C) 108
(D) 150
Ans: B
33. A right regular hexagonal prism in resting on HP on its base, its top view is a. (A) square (B) hexagon (C) rectangle (D) pentagon
Ans: B
34. The following is the method for development of a sphere: (A) Parallel line method (B) Triangulation method (C) Radial line method (D) Approximate method
Ans: D
35. If 'P' is the Ratio of inside to outside diameter of a shaft, the ratio of torque carrying capacity of solid shaft to that of hollow shaft is given by
A:-`(1-P^4)^(-1)`
B:-`1-P^4`
C:-`P^4`
D:-`(1)/(P^4)`
Ans: A
36. Angle of helix in a closed coiled spring is
A:-<100
B:->100
C:-=100
D:-None
Ans: A
37. For the same maximum pressure and temperature of Otto, Diesel and dual combustion air standard cycles
A:-The compression ratio will be same
B:-Heat supplied to the cycles will be same
C:-Air standard efficiency will have same value
D:-Heat rejected by the engine will be same
Ans: D
38. Critical thickness of insulation for sphere is given by [k `->` thermal conductivity, h `->` heat transfer coefficient]
A:-`k//h`
B:-`(k)/(4Pih)`
C:-`(h)/(2k)`
D:-`(2k)/(h)`
Ans: D
39. In a certain Heat exchanger, both fluids have identical mass flow rate -sp. heat product. The hotfluid enters at 76°C and leaves at 47°C and cold fluid enters at 26°C and leaves at 55°C. The effectiveness of heat exchanger is
A:-0.16
B:-0.58
C:-0.72
D:-1.0
Ans: B
40. When ammonia is used as Refrigerant, the recommended material used for Refrigerant lines are
A:-Copper
B:-Aluminium
C:-Steel
D:-Brass
Ans: C
41. Which type of compressor mostly used in supercharger of internal combustion engines ?
A:-Roots blower
B:-Axial flow compressor
C:-Redial flow compressor
D:-Reciprocating compressor
Ans: C
42. Thermostatic expansion valves are set mostly for a super heat of
A:-5°C
B:-10°C
C:-15°C
D:-20°C
Ans: A
43. In a Refrigeration system with multiple evaporators at different temperature with compound compression and flash intercooler, the suction vapour to the high pressure stage is
A:-Wet state
B:-Dry saturated
C:-Super heated
D:-Saturated liquid
Ans: B
44. The supply air state of cooling coil with a bypass factor (BPF) lies at
A:-Intersection of RSHF line with saturation curve
B:-Intersection of GSHF line with saturation curve
C:-Point dividing RSHF line in proportion of BPF and (1-BPF)
D:-Intersection of RSHF line and GSHF line
Ans: D
45. The degree of warmth or cold felt by a human body depends mainly on
A:-DBT
B:-Relative humidity
C:-Air velocity
D:-All of the above
Ans: D
46. Petrol Enginer has compression ratio from
A:-6 to 10
B:-10 to 15
C:-15 to 25
D:-25 to 40
Ans: A
47. Which of the following is not included under the definition of wages given under the payment of wages Act, 1936 ?
A:-Basic wage
B:-Dearness Allowance
C:-Gratuity
D:-Incentive
Ans: C
48. Shadow price in linear programming refers to the
A:-lowest sales price
B:-maximum cost per item
C:-value assigned to one unit
D:-cost of bought out items
Ans: C
49. Which of the following stock valuation methods is based on a cost estimate made before the part is purchased?
A:-FIFO
B:-WFO
C:-Standard costing
D:-Average costing
Ans: C
50. Vehicle manufacturing assembly line is an example of
A:-Product layout
B:-Process layout
C:-Group layout
D:-Fixed position layout
Ans: A
51. For forecasting the potential of a new product which one of the following method is used ?
A:-Time series analysis
B:-Direct survey method
C:-Sales force composite method
D:-Jury of executive opinion method
Ans: B
52. SIMO charts are used in
A:-method study
B:-micro motion study
C:-process analysis
D:-layout analysis
Ans: B
53. The control chart used for the fraction of defective items in a sample is
A:-Range chart
B:-Mean chart
C:-P-chart
D:-C-chart
Ans: C
54. Low cost, higher volume items requires
A:-no inspection
B:-little inspection
C:-intensive inspection
D:-100% inspection
Ans: B
55. Which of the following is not a method of depreciation ?
A:-Replacement method
B:-Revaluation
C:-Reducing balance
D:-Straight line
Ans: A
56. The department which take care of both production as well as control is
A:-Routing
B:-Dispatching
C:-Expediting
D:-Scheduling
Ans: D
57. Queing theory is associated with
A:-Sales
B:-Inspection time
C:-Production time
D:-Waiting time
Ans: D
58. If y = `log_(e)x` + `log_(x)e` + `log_(x)x`, then the value of the derivative of y with respect to x at x = e is :
A:-0
B:-1
C:-e
D:-None of the above
Ans: A
59. Equation of the line with mid-point (3, 2) on then portion between the x and y axis is :
A:-2x-3y = 0
B:-3x+2y = 13
C:-2x+3y = 12
D:-None of the above
Ans: C
60. The area of the parallelogram with one at the origin, having sides as lines with slopes 3 and 4 and making unit intercept on the y-axis is :
A:-1
B:-2
C:-3
D:-4
Ans: A
61. The minimum value of `log_(a)x` +`log_(x)a` at x = `(a)/(2)` where 0 < `(a)/(2)` < a is :
A:-0
B:-1
C:-2
D:-3
Ans: C
62. If f(x) = min {|x - 1|, |x|, |x+1|} then the indefinite integral of f(x) between -1 and 1 is :
A:-0
B:-1
C:-z
D:-None of these
Ans: D
63. The area of the graph of the function y = |x-5| and the y axis between the limits 0 and 8 is :
A:-17
B:-9
C:-12
D:-18
Ans: A
64. The larger of `99^(99)` + `100^(99)` and `101^(99)` is :
A:-`101^(99)`
B:-`99^(99)` + `100^(99)`
C:-Both are equal
D:-None of these
Ans: A
65. The value of a for which the system of equations 2x + y - 5 = 0, x - 2y + 1 = 0 and 2x - 14y - a = 0 is consistent is :
A:-1
B:-2
C:--16
D:--12
Ans: C
66. If cos`alpha` + cos`beta` = 0 = sin`alpha` + sin`beta` then cos 2`alpha` + cos 2`beta` =
A:--2 sin (`alpha` + `beta`)
B:--2 cos (`alpha` + `beta`)
C:-2 sin (`alpha` + `beta`)
D:-2 cos (`alpha` + `beta`)
Ans: B
67. The value of 4 cos A cos (60-A) cos (60 + A) is
A:-8 cos 3A
B:-4 cos 3A
C:-2 cos 3A
D:-cos 3A
Ans: D
68. Frequency of AC power distribution in India is
A:-230 Hz
B:-60 Hz
C:-50 Hz
D:-11 Hz
Ans: C
69. If 'n' number of resistors with 'R' Ohm each are connected in series and parallel separately, the equivalent resistance will be
A:-nR and R/n
B:-(n+R) and (n-R)
C:-nR and n/R
D:-nR and (R-n)
Ans: A
70. The impedance in an R-L-C series circuit at Resonance condition will be
A:-X/R
B:-R
C:-L/R
D:-LC
Ans: B
71. In AC circuits the power delivered to load at Unity Power Factor (UPF) condition will be
A:-Negative
B:-Minimum
C:-Zero
D:-Maximum
Ans: D
72. The device which is connected in electrical wiring for earth leakage protection is
A:-ELCB
B:-MCB
C:-Fuse
D:-Isolator
Ans: A
73. In a brick masonry what is called a lap ?
A:-distance between successive vertical joints
B:-distance between successive courses
C:-distance between adjacent bats
D:-distance between adjacent queen closers
Ans: A
74. What is meant by reduced level ?
A:-height of line of collimation above bench mark
B:-height of a point above bench mark
C:-depth of a point below datum
D:-depth of a point below bench mark
Ans: C
75. For preparation of concrete which type of aggregate should be preferred for economy ?
A:-angular aggregate
B:-rounded aggregate
C:-flaky aggregate
D:-elongated aggregate
Ans: B
76. Which among the following is Fe 250 grade steel ?
A:-Plain bars
B:-HYSD bars
C:-TOR steel
D:-TMT steel
Ans: A
77. In which case direct ranging is used ?
A:-If two stations are not intervisible
B:-If the interveining ground between two stations is a hill
C:-If the distance between two stations is less than the length of measuring chain
D:-If the distance between two stations is more than the length of measuring chain
Ans: D
78. The function of a flywheel is
A:-To convert reciprocating motion of the piston into rotary motion
B:-To convert rotary motion of the crankshaft into to and fro motion of the valve rod
C:-To prevent fluctuation of speed
D:-To keep engine speed uniform at all load conditions
Ans: C
79. The thermodynamic cycle on which petrol engine works is
A:-Otto
B:-Joule
C:-Rankine
D:-Stirling
Ans: A
80. A moderator in a nuclear power plant is a medium used to
A:-Slow down the speed of fast moving electrons
B:-Control the reaction
C:-Reduce the temperature
D:-Extract heat from nuclear reaction
Ans: B
81. A Pelton turbine requires
A:-High head and high discharge
B:-High head and low discharge
C:-Low head and low discharge
D:-low head and high discharge
Ans: B
82. In an automotive differential, the drive pinion is assembled into the
A:-Drive shaft
B:-Axle case
C:-Differential case
D:-Differential housing
Ans: D
83. In an unregulated power supply, if input ac voltage increases output voltage _________
A:-Increases
B:-Decreases
C:-Remains the same
D:-None of the above
Ans: A
84. If energy is taken from the ac side of the inverter and sends it back in to the dc side then it is known as__________
A:-Motoring mode operation
B:-Braking mode operation
C:-Regenerative mode operation
D:-None of the above
Ans: C
85. The type of access used in GSM technology is __________
A:-FDMA/TDMA
B:-CDMA
C:-OFDMA
D:-None of the above
Ans: A
86. The coverage and capacity of CDMA system is more than that of GSM system.
A:-True
B:-False
C:-Equal
D:-None of the above
Ans: A
87. Which toxic compound is not found in e-waste ?
A:-Mercury
B:-Cadmium
C:-Neon
D:-Lead
Ans: C
88: A steel bar 200mm in diameter is turned at a feed of 0.25 mm/rev. with a depth of cut of 4mm. The rotational speed of work piece is 160 rpm. The material removal rate (mm3/s) is
A 160
B 167.6
C 1600
D 1675.5
Ans: D
89: It is required to cut screw threads of 2mm pitch on a lathe. Lead screw has pitch of 6mm. If spindle speed is 60 rpm, find the speed (rpm)of lead screw for single start threads.
A 10
B 20
C 100
D 200
Ans: B
90: In metal cutting operation, the approximate ratio of heat distributed among chip, tool and work, in that order is
A 70:20:10
B 33:33:33
C 20:70:10
D 10:10:80
Ans: A
91: A metric thread of pitch = 2mm and thread angle = 60° is inspected for its pitch diameter using 3- wire method. The diameter(mm) of the best size wire is
A 0.866
B 1.000
C 1.154
D 2.000
Ans: C
92. Files are classified and named according to three principal factors :
(A) Size (B) Shape
(C) Both (A) and (B) (D) None of these
Ans: C
93. For making thread on hole __________ is used.
(A) Broach (B) Die and die stock
(C) Centre drill (D) Tap and tap wrench
Ans: D
94. The length of a hacksaw blade is usually __________.
(A) 200 mm (B) 300 mm (C) 350 mm (D) 300 cm
Ans: B
95. For measuring the pitch of thread __________ is used.
(A) Feeler gauge (B) Standard wire gauge
(C) Limit gauge (D) Screw pitch gauge
Ans: D
96. Checking the clearance between two mating parts, __________ is used.
(A) Feeler gauge (B) Radius gauge
(C) Standard wire gauge (D) Pressure gauge
Ans: A
97. A __________ is used to remove little metal from the hole and to bring it to the correct size.
(A) Scriber (B) Tap
(C) Combination centre drill (D) Reamer
Ans: D
98. Engineer’s parallel jaw bench vice is also called :
(A) Bench vice (B) Pipe vice (C) Pin vice (D) Lag vice
Ans: A
99. For holding round section metal, tubes, pipes, etc. __________ vice is used.
(A) Bench vice (B) Pipe vice (C) Leg vice (D) None of these
Ans: B
100. Metal which contain iron as base are called __________.
(A) Ferrous metal (B) Non-ferrous metal
(C) Both (A) and (B) (D) None of these
Ans: A
A:-Time series analysis
B:-Direct survey method
C:-Sales force composite method
D:-Jury of executive opinion method
Ans: B
52. SIMO charts are used in
A:-method study
B:-micro motion study
C:-process analysis
D:-layout analysis
Ans: B
53. The control chart used for the fraction of defective items in a sample is
A:-Range chart
B:-Mean chart
C:-P-chart
D:-C-chart
Ans: C
54. Low cost, higher volume items requires
A:-no inspection
B:-little inspection
C:-intensive inspection
D:-100% inspection
Ans: B
55. Which of the following is not a method of depreciation ?
A:-Replacement method
B:-Revaluation
C:-Reducing balance
D:-Straight line
Ans: A
56. The department which take care of both production as well as control is
A:-Routing
B:-Dispatching
C:-Expediting
D:-Scheduling
Ans: D
57. Queing theory is associated with
A:-Sales
B:-Inspection time
C:-Production time
D:-Waiting time
Ans: D
58. If y = `log_(e)x` + `log_(x)e` + `log_(x)x`, then the value of the derivative of y with respect to x at x = e is :
A:-0
B:-1
C:-e
D:-None of the above
Ans: A
59. Equation of the line with mid-point (3, 2) on then portion between the x and y axis is :
A:-2x-3y = 0
B:-3x+2y = 13
C:-2x+3y = 12
D:-None of the above
Ans: C
60. The area of the parallelogram with one at the origin, having sides as lines with slopes 3 and 4 and making unit intercept on the y-axis is :
A:-1
B:-2
C:-3
D:-4
Ans: A
61. The minimum value of `log_(a)x` +`log_(x)a` at x = `(a)/(2)` where 0 < `(a)/(2)` < a is :
A:-0
B:-1
C:-2
D:-3
Ans: C
62. If f(x) = min {|x - 1|, |x|, |x+1|} then the indefinite integral of f(x) between -1 and 1 is :
A:-0
B:-1
C:-z
D:-None of these
Ans: D
63. The area of the graph of the function y = |x-5| and the y axis between the limits 0 and 8 is :
A:-17
B:-9
C:-12
D:-18
Ans: A
64. The larger of `99^(99)` + `100^(99)` and `101^(99)` is :
A:-`101^(99)`
B:-`99^(99)` + `100^(99)`
C:-Both are equal
D:-None of these
Ans: A
65. The value of a for which the system of equations 2x + y - 5 = 0, x - 2y + 1 = 0 and 2x - 14y - a = 0 is consistent is :
A:-1
B:-2
C:--16
D:--12
Ans: C
66. If cos`alpha` + cos`beta` = 0 = sin`alpha` + sin`beta` then cos 2`alpha` + cos 2`beta` =
A:--2 sin (`alpha` + `beta`)
B:--2 cos (`alpha` + `beta`)
C:-2 sin (`alpha` + `beta`)
D:-2 cos (`alpha` + `beta`)
Ans: B
67. The value of 4 cos A cos (60-A) cos (60 + A) is
A:-8 cos 3A
B:-4 cos 3A
C:-2 cos 3A
D:-cos 3A
Ans: D
68. Frequency of AC power distribution in India is
A:-230 Hz
B:-60 Hz
C:-50 Hz
D:-11 Hz
Ans: C
69. If 'n' number of resistors with 'R' Ohm each are connected in series and parallel separately, the equivalent resistance will be
A:-nR and R/n
B:-(n+R) and (n-R)
C:-nR and n/R
D:-nR and (R-n)
Ans: A
70. The impedance in an R-L-C series circuit at Resonance condition will be
A:-X/R
B:-R
C:-L/R
D:-LC
Ans: B
71. In AC circuits the power delivered to load at Unity Power Factor (UPF) condition will be
A:-Negative
B:-Minimum
C:-Zero
D:-Maximum
Ans: D
72. The device which is connected in electrical wiring for earth leakage protection is
A:-ELCB
B:-MCB
C:-Fuse
D:-Isolator
Ans: A
73. In a brick masonry what is called a lap ?
A:-distance between successive vertical joints
B:-distance between successive courses
C:-distance between adjacent bats
D:-distance between adjacent queen closers
Ans: A
74. What is meant by reduced level ?
A:-height of line of collimation above bench mark
B:-height of a point above bench mark
C:-depth of a point below datum
D:-depth of a point below bench mark
Ans: C
75. For preparation of concrete which type of aggregate should be preferred for economy ?
A:-angular aggregate
B:-rounded aggregate
C:-flaky aggregate
D:-elongated aggregate
Ans: B
76. Which among the following is Fe 250 grade steel ?
A:-Plain bars
B:-HYSD bars
C:-TOR steel
D:-TMT steel
Ans: A
77. In which case direct ranging is used ?
A:-If two stations are not intervisible
B:-If the interveining ground between two stations is a hill
C:-If the distance between two stations is less than the length of measuring chain
D:-If the distance between two stations is more than the length of measuring chain
Ans: D
78. The function of a flywheel is
A:-To convert reciprocating motion of the piston into rotary motion
B:-To convert rotary motion of the crankshaft into to and fro motion of the valve rod
C:-To prevent fluctuation of speed
D:-To keep engine speed uniform at all load conditions
Ans: C
79. The thermodynamic cycle on which petrol engine works is
A:-Otto
B:-Joule
C:-Rankine
D:-Stirling
Ans: A
80. A moderator in a nuclear power plant is a medium used to
A:-Slow down the speed of fast moving electrons
B:-Control the reaction
C:-Reduce the temperature
D:-Extract heat from nuclear reaction
Ans: B
81. A Pelton turbine requires
A:-High head and high discharge
B:-High head and low discharge
C:-Low head and low discharge
D:-low head and high discharge
Ans: B
82. In an automotive differential, the drive pinion is assembled into the
A:-Drive shaft
B:-Axle case
C:-Differential case
D:-Differential housing
Ans: D
83. In an unregulated power supply, if input ac voltage increases output voltage _________
A:-Increases
B:-Decreases
C:-Remains the same
D:-None of the above
Ans: A
84. If energy is taken from the ac side of the inverter and sends it back in to the dc side then it is known as__________
A:-Motoring mode operation
B:-Braking mode operation
C:-Regenerative mode operation
D:-None of the above
Ans: C
85. The type of access used in GSM technology is __________
A:-FDMA/TDMA
B:-CDMA
C:-OFDMA
D:-None of the above
Ans: A
86. The coverage and capacity of CDMA system is more than that of GSM system.
A:-True
B:-False
C:-Equal
D:-None of the above
Ans: A
87. Which toxic compound is not found in e-waste ?
A:-Mercury
B:-Cadmium
C:-Neon
D:-Lead
Ans: C
88: A steel bar 200mm in diameter is turned at a feed of 0.25 mm/rev. with a depth of cut of 4mm. The rotational speed of work piece is 160 rpm. The material removal rate (mm3/s) is
A 160
B 167.6
C 1600
D 1675.5
Ans: D
89: It is required to cut screw threads of 2mm pitch on a lathe. Lead screw has pitch of 6mm. If spindle speed is 60 rpm, find the speed (rpm)of lead screw for single start threads.
A 10
B 20
C 100
D 200
Ans: B
90: In metal cutting operation, the approximate ratio of heat distributed among chip, tool and work, in that order is
A 70:20:10
B 33:33:33
C 20:70:10
D 10:10:80
Ans: A
91: A metric thread of pitch = 2mm and thread angle = 60° is inspected for its pitch diameter using 3- wire method. The diameter(mm) of the best size wire is
A 0.866
B 1.000
C 1.154
D 2.000
Ans: C
92. Files are classified and named according to three principal factors :
(A) Size (B) Shape
(C) Both (A) and (B) (D) None of these
Ans: C
93. For making thread on hole __________ is used.
(A) Broach (B) Die and die stock
(C) Centre drill (D) Tap and tap wrench
Ans: D
94. The length of a hacksaw blade is usually __________.
(A) 200 mm (B) 300 mm (C) 350 mm (D) 300 cm
Ans: B
95. For measuring the pitch of thread __________ is used.
(A) Feeler gauge (B) Standard wire gauge
(C) Limit gauge (D) Screw pitch gauge
Ans: D
96. Checking the clearance between two mating parts, __________ is used.
(A) Feeler gauge (B) Radius gauge
(C) Standard wire gauge (D) Pressure gauge
Ans: A
97. A __________ is used to remove little metal from the hole and to bring it to the correct size.
(A) Scriber (B) Tap
(C) Combination centre drill (D) Reamer
Ans: D
98. Engineer’s parallel jaw bench vice is also called :
(A) Bench vice (B) Pipe vice (C) Pin vice (D) Lag vice
Ans: A
99. For holding round section metal, tubes, pipes, etc. __________ vice is used.
(A) Bench vice (B) Pipe vice (C) Leg vice (D) None of these
Ans: B
100. Metal which contain iron as base are called __________.
(A) Ferrous metal (B) Non-ferrous metal
(C) Both (A) and (B) (D) None of these
Ans: A
· UPSC Exam Syllabus- Mechanical Engineering
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