MECHANICAL ENGINEERING- PAGE 22
Mechanical Engineering MCQs- Page 22
1. Electricity in motion is called
(A) static current (B) dynamic current (C) electric current (D) none of these
Ans: C
2. The nucleus is the central part of the
(A) neutron (B) proton (C) electron (D) atom
Ans: D
3. The electron is _____ times larger in diameter than the proton.
(A) two (B) three (C) four (D) five
Ans: B
4. Atoms that have the outer shell exactly filled are chemically
(A) active (B) inactive (C) pro-active (D) combine other elements
Ans: B
5. A conductor is a material that has many free
(A) electrons (B) neutrons (C) protons (D) nucleus
Ans: A
6. Specially treated _____ are used to make modern electronic components such as diodes, transistors and integrated circuit chips.
(A) conductors (B) insulators (C) semi-conductors (D) super-conductors
Ans: C
7. The ammeter is connected in _____ in the circuit on the vehicle panel board.
(A) series (B) parallel (C) temporarily (D) none of these
Ans: A
8. To check the continuity of the field coils _____ is used.
(A) volt meter (B) ammeter (C) hydrometer (D) ohmmeter
Ans: D
9. Each load receives full system voltage in _____ circuit.
(A) open (B) short (C) parallel (D) series
Ans: C
10. The scale of the ohm meter is
(A) non-linear (B) Scale is usually backward. (C) both (A) & (B) (D) none of these
Ans: C
11. The cored solder used for electrical/electronic work is
(A) 50% tin : 50% lead (B) 60% tin : 40% lead (C) 40% tin : 60% lead (D) 50% tin : 50% copper
Ans: B
12. _____ is essentially required for the protection of building against lighting
(A) Shielding (B) Earthing (C) Neutral (D) None of these
Ans: B
13. When multimeter is set for the _____ function, the multimeter must not to the circuit with the circuits power is on.
(A) voltmeter (B) ammeter (C) ohmmeter (D) hydrometer
Ans: C
14. Fuse is a/an _____ portion in the electrical circuit.
(A) conductor (B) insulated (C) strongest (D) weakest
Ans: D
15. In automobile electrical, _____ circuits are found without fuse.
(A) oil pressure lamp (B) head light (C) horn (D) heater & air conditioner
Ans: A
16. The mathematical expression of Ohm’s law is
(A) I = VR
(B) I = R/V
(C) I = V/R
(D) R = VI
Ans: C
17. Which metal is having property of more electric conductivity ?
(A) Copper (B) Gold (C) Aluminum (D) Silver
Ans: D
18. In electronic industry most of the resistors used are _____ resistors.
(A) carbon (B) wire wound (C) metal film (D) cement film
Ans: A
19. The unit of electric charge stored in a capacitor is
(A) voltage (B) ampere (C) farad (D) coulomb
Ans: D
20. The positive plate grids of lead acid battery is filled with
(A) antimony alloy (B) carbon (C) spongy lead (D) lead peroxide
Ans: D
21. Transmission and control of power by means of _____ is called hydraulics.
(A) air (B) electricity (C) liquid (D) vacuum
Ans: C
22. The unit of pressure 1 bar is equal to
(A) 100 kPa (B) 14.5 psi (C) 1.02 kgf/cm2 (D) all of these
Ans: D
23. _____ states that pressure exerted on a fluid is transmitted equally in all directions, acting with equal forces on equal areas.
(A) Ohm’s law (B) Newton’s law (C) Pascal’s law (D) Boyle’s law
Ans: C
24. The unit FRL means
(A) Fuel Regulated Line (B) Filter Regulator & Lubricator (C) Fuel Regulated Lubricator (D) none of these
Ans: B
25. Compression Ratio (CR) of an engine is equal to
(A) VS/VC
(B) VC/VS
(C) (VS + VC)/VC
(D) VS/(VS + VC)
Ans: C
26. In some engines the axis of the tappet is slightly offset from the axis of the cam lob to
(A) convert the rotary motion into reciprocating motion (B) to drive fuel pump
(C) to rotate tappet or lifter when it moves up (D) to get the drive from crank shaft
Ans: C
27. Compression ratio of diesel engines are approximately
(A) 6 : 1 (B) 10 : 1 (C) 24 : 1 (D) 50 : l
Ans: C
28. In diesel engines,
(A) Ignition takes place at constant pressure and heat rejected at constant volume
(B) Ignition take place at constant volume and heat rejected at constant volume
(C) Ignition take place at constant volume and heat rejected at constant pressure
(D) Ignition take place at constant pressure and heat rejected at constant pressure
Ans: A
29. The instrument indicate the distance covered by a vehicle is
(A) speedometer (B) RPM meter (C) Ammeter (D) Odometer
Ans: D
30. Materials used for the liners are
(A) cast iron (B) aluminum (C) nitride cast iron (D) aluminum alloy
Ans: C
31. The valves used in 2 stroke engines :
(A) Poppet valve (B) Rotary valve (C) Reed valve (D) Sleeve valve
Ans: C
32. The valve overlap is provided
(A) at the end of exhaust stroke and the beginning of suction stroke.
(B) at the end of suction stroke and the beginning of compression stroke.
(C) at the end of compression stroke and the beginning of the power stroke.
(D) at the end of power stroke and the beginning of exhaust stroke.
Ans: A
33. The extra groove cast in between top ring groove and piston crown is known as
(A) ring section (B) land (C) split skirt (D) heat dam
Ans: D
34. The skirt of _____ piston is oval in shape, the diameter across the gudgeon pin is less and when the piston heated up the bosses expand outwards making piston round.
(A) solid skirt (B) cam ground (C) slipper (D) split skirt
Ans: B
35. The piston pins are made of
(A) nickel alloy (B) cast iron (C) bronze (D) copper
Ans: A
36. The inertia of the _____ tends to keep the crankshaft to rotate at a constant speed.
(A) vibration damper (B) balancing weight (C) crank-arms (D) flywheel
Ans: D
37. The lining materials for crankshaft bearings are
(A) copper-lead (B) copper-cadmium alloy (C) lead-copper (D) all the above
Ans: D
38. _____ can take axial and radial loads.
(A) Ball bearings (B) Roller bearings (C) Taper roller bearings (D) Needle roller bearings
Ans: C
39:-The tool used for marking and testing of angles 90°
A:-Try-square B:-Mitre square C:-Beve| square D:-Straight edge
Ans: A
40:-Scaffolding method is used for travel up to.
A:-70 m B:-60 m C:-50 m D:-40 m
Ans: D
41:-A moving staircase which carries people between floors of building.
A:-Lift B:-Escalator C:-Hoist D:-Derrick
Ans: B
42:-Which of the following is a scalar quantity?
A:-Force B:-Velocity C:-Acce|eration D:-Speed
Ans: D
43:-The side of an escalator extending above the step.
A:-Comb plate B:-Lower landing C:-Ba|ustrade D:-Upper landing
Ans: C
44:-String cable is used to
A:-Prevent lifting of doors B:-Connect two door panels C:-Fixing header to wall D:-Support travelling cable
Ans: B
45:-Scribers are made of
A:-Cast iron B:-Mi|d steel C:-High carbon steel D:-Brass
Ans: C
46:-The part of the step where a passenger stands on escalator.
A:-Step tread B:-Riser C:-Skirt D:-Truss
Ans: A
47:-The point angle of the drill depends on the.
A:-RPM of drill B:-Size of drill C:-Size of the machine D:-Materia| of work
Ans: D
48:-Fi|e card is used for
A:-Cleaning the work piece
B:-Renew the file teeth
C:-Cleaning the file teeth
D:-Cleaning the chips
Ans: C
49:-Mechanical device attached to the car frame or counter weight to stop and hold in the event of free fall
A:-Retiring cam B:-Safety gear C:-Over head pulley D:-Buffer
Ans: B
50:-Which device is used to mount the pulley on shaft?
A:-Key B:-Belt C:-Chain D:-F|ange
Ans: A
(A) static current (B) dynamic current (C) electric current (D) none of these
Ans: C
2. The nucleus is the central part of the
(A) neutron (B) proton (C) electron (D) atom
Ans: D
3. The electron is _____ times larger in diameter than the proton.
(A) two (B) three (C) four (D) five
Ans: B
4. Atoms that have the outer shell exactly filled are chemically
(A) active (B) inactive (C) pro-active (D) combine other elements
Ans: B
5. A conductor is a material that has many free
(A) electrons (B) neutrons (C) protons (D) nucleus
Ans: A
6. Specially treated _____ are used to make modern electronic components such as diodes, transistors and integrated circuit chips.
(A) conductors (B) insulators (C) semi-conductors (D) super-conductors
Ans: C
7. The ammeter is connected in _____ in the circuit on the vehicle panel board.
(A) series (B) parallel (C) temporarily (D) none of these
Ans: A
8. To check the continuity of the field coils _____ is used.
(A) volt meter (B) ammeter (C) hydrometer (D) ohmmeter
Ans: D
9. Each load receives full system voltage in _____ circuit.
(A) open (B) short (C) parallel (D) series
Ans: C
10. The scale of the ohm meter is
(A) non-linear (B) Scale is usually backward. (C) both (A) & (B) (D) none of these
Ans: C
11. The cored solder used for electrical/electronic work is
(A) 50% tin : 50% lead (B) 60% tin : 40% lead (C) 40% tin : 60% lead (D) 50% tin : 50% copper
Ans: B
12. _____ is essentially required for the protection of building against lighting
(A) Shielding (B) Earthing (C) Neutral (D) None of these
Ans: B
13. When multimeter is set for the _____ function, the multimeter must not to the circuit with the circuits power is on.
(A) voltmeter (B) ammeter (C) ohmmeter (D) hydrometer
Ans: C
14. Fuse is a/an _____ portion in the electrical circuit.
(A) conductor (B) insulated (C) strongest (D) weakest
Ans: D
15. In automobile electrical, _____ circuits are found without fuse.
(A) oil pressure lamp (B) head light (C) horn (D) heater & air conditioner
Ans: A
16. The mathematical expression of Ohm’s law is
(A) I = VR
(B) I = R/V
(C) I = V/R
(D) R = VI
Ans: C
17. Which metal is having property of more electric conductivity ?
(A) Copper (B) Gold (C) Aluminum (D) Silver
Ans: D
18. In electronic industry most of the resistors used are _____ resistors.
(A) carbon (B) wire wound (C) metal film (D) cement film
Ans: A
19. The unit of electric charge stored in a capacitor is
(A) voltage (B) ampere (C) farad (D) coulomb
Ans: D
20. The positive plate grids of lead acid battery is filled with
(A) antimony alloy (B) carbon (C) spongy lead (D) lead peroxide
Ans: D
21. Transmission and control of power by means of _____ is called hydraulics.
(A) air (B) electricity (C) liquid (D) vacuum
Ans: C
22. The unit of pressure 1 bar is equal to
(A) 100 kPa (B) 14.5 psi (C) 1.02 kgf/cm2 (D) all of these
Ans: D
23. _____ states that pressure exerted on a fluid is transmitted equally in all directions, acting with equal forces on equal areas.
(A) Ohm’s law (B) Newton’s law (C) Pascal’s law (D) Boyle’s law
Ans: C
24. The unit FRL means
(A) Fuel Regulated Line (B) Filter Regulator & Lubricator (C) Fuel Regulated Lubricator (D) none of these
Ans: B
25. Compression Ratio (CR) of an engine is equal to
(A) VS/VC
(B) VC/VS
(C) (VS + VC)/VC
(D) VS/(VS + VC)
Ans: C
26. In some engines the axis of the tappet is slightly offset from the axis of the cam lob to
(A) convert the rotary motion into reciprocating motion (B) to drive fuel pump
(C) to rotate tappet or lifter when it moves up (D) to get the drive from crank shaft
Ans: C
27. Compression ratio of diesel engines are approximately
(A) 6 : 1 (B) 10 : 1 (C) 24 : 1 (D) 50 : l
Ans: C
28. In diesel engines,
(A) Ignition takes place at constant pressure and heat rejected at constant volume
(B) Ignition take place at constant volume and heat rejected at constant volume
(C) Ignition take place at constant volume and heat rejected at constant pressure
(D) Ignition take place at constant pressure and heat rejected at constant pressure
Ans: A
29. The instrument indicate the distance covered by a vehicle is
(A) speedometer (B) RPM meter (C) Ammeter (D) Odometer
Ans: D
30. Materials used for the liners are
(A) cast iron (B) aluminum (C) nitride cast iron (D) aluminum alloy
Ans: C
31. The valves used in 2 stroke engines :
(A) Poppet valve (B) Rotary valve (C) Reed valve (D) Sleeve valve
Ans: C
32. The valve overlap is provided
(A) at the end of exhaust stroke and the beginning of suction stroke.
(B) at the end of suction stroke and the beginning of compression stroke.
(C) at the end of compression stroke and the beginning of the power stroke.
(D) at the end of power stroke and the beginning of exhaust stroke.
Ans: A
33. The extra groove cast in between top ring groove and piston crown is known as
(A) ring section (B) land (C) split skirt (D) heat dam
Ans: D
34. The skirt of _____ piston is oval in shape, the diameter across the gudgeon pin is less and when the piston heated up the bosses expand outwards making piston round.
(A) solid skirt (B) cam ground (C) slipper (D) split skirt
Ans: B
35. The piston pins are made of
(A) nickel alloy (B) cast iron (C) bronze (D) copper
Ans: A
36. The inertia of the _____ tends to keep the crankshaft to rotate at a constant speed.
(A) vibration damper (B) balancing weight (C) crank-arms (D) flywheel
Ans: D
37. The lining materials for crankshaft bearings are
(A) copper-lead (B) copper-cadmium alloy (C) lead-copper (D) all the above
Ans: D
38. _____ can take axial and radial loads.
(A) Ball bearings (B) Roller bearings (C) Taper roller bearings (D) Needle roller bearings
Ans: C
39:-The tool used for marking and testing of angles 90°
A:-Try-square B:-Mitre square C:-Beve| square D:-Straight edge
Ans: A
40:-Scaffolding method is used for travel up to.
A:-70 m B:-60 m C:-50 m D:-40 m
Ans: D
41:-A moving staircase which carries people between floors of building.
A:-Lift B:-Escalator C:-Hoist D:-Derrick
Ans: B
42:-Which of the following is a scalar quantity?
A:-Force B:-Velocity C:-Acce|eration D:-Speed
Ans: D
43:-The side of an escalator extending above the step.
A:-Comb plate B:-Lower landing C:-Ba|ustrade D:-Upper landing
Ans: C
44:-String cable is used to
A:-Prevent lifting of doors B:-Connect two door panels C:-Fixing header to wall D:-Support travelling cable
Ans: B
45:-Scribers are made of
A:-Cast iron B:-Mi|d steel C:-High carbon steel D:-Brass
Ans: C
46:-The part of the step where a passenger stands on escalator.
A:-Step tread B:-Riser C:-Skirt D:-Truss
Ans: A
47:-The point angle of the drill depends on the.
A:-RPM of drill B:-Size of drill C:-Size of the machine D:-Materia| of work
Ans: D
48:-Fi|e card is used for
A:-Cleaning the work piece
B:-Renew the file teeth
C:-Cleaning the file teeth
D:-Cleaning the chips
Ans: C
49:-Mechanical device attached to the car frame or counter weight to stop and hold in the event of free fall
A:-Retiring cam B:-Safety gear C:-Over head pulley D:-Buffer
Ans: B
50:-Which device is used to mount the pulley on shaft?
A:-Key B:-Belt C:-Chain D:-F|ange
Ans: A
51:-The included angle of V- Belt is usually
A:-10° - 20°
B:-20° - 30°
C:-30° - 40°
D:-60° - 70°
Ans: C
52:-Why rotatable bevels are used in dial indicator
A:-The work of machine setting B:-Acts as an offset attachment
C:-Prevent shocks D:-For making final zero setting
Ans: D
53:-The connection link used to make a connection between sling and load to be lifted is
A:-Pu||ey B:-Shack|e C:-Hoist D:-Derricks
Ans: B
54:-Rivet used for structural application is
A:-Pan head B:-Snap head C:-Mush room head D:-Counter sunk head
Ans: B
55:-The arc used in Electric Arc welding is
A:-Low voltage high current B:-High voltage high current
C:-Low voltage low current D:-High voltage low current
Ans: A
56:-The flux used in brazing
A:-Zinc chloride B:-Borax C:-Ammonium chloride D:-Alcohol
Ans: B
57:-How many types of foundations are there based on depth?
A:-3
B:-4
C:-5
D:-2
Ans: D
58:-Size of a wire rope specified by its.
A:-Nominal diameter B:-Number of strands C:-Number of wire per strand D:-Length of wire
Ans: A
59:-A hacksaw blade specified by its.
A:-Length B:-Material C:-Width D:-Number of teeth
Ans: A
60:-Which of the following is a solid lubricant?
A:-Copper B:-Molybdenum C:-Graphite D:-Oil
Ans: C
61:-A device which acts as stopping mechanism when the elevator runs beyond its rated speed.
A:-Limit switch B:-Over speed governor
C:-Hydrau|ic ram D:-Traction sheave
Ans: B
62:-One Micrometer is equal to.
A:-0.1mm
B:-0.01mm
C:-0.001mm
D:-0.0001mm
Ans: C
63:-If the belt of an electric motor is broken, it needs the following type of maintenance
A:-Corrective B:-Scheduled C:-Preventive D:-Timely
Ans: A
64:-Type of maintenance is done before failure.
A:-Preventive B:-Running C:-Break down D:-Scheduled
Ans: A
65:-The device which connects the elevator car and landing doors without backlash.
A:-Door track B:-Door coupler
C:-Door contact D:-Door motor
Ans: B
66:-|t is used to know the elevator car position.
A:-Landing push button
B:-Floor position indicator
C:-Door contact
D:-Door sill
Ans: B
67:-Which of the following is not a safety device on an elevator?
A:-Door lock B:-Over speed governor
C:-Call button D:-Limit switch
Ans: C
68:-Compensating ropes are generally required on elevators when the travel is.
A:-5 M B:-10 M C:-20 M D:-30 M or greater
Ans: D
69:-A cylindrical rod with both ends threaded is known as.
A:-Bo|t B:-Tap bolt C:-Stud D:-Set-screw
Ans: C
70:-Sliding part between elevator guide rail and car.
A:-Thimb|e rod B:-Guide shoe C:-Bu||dog grip D:-Safety edge
Ans: B
71:-The elevator which is used to transport goods.
A:-Passenger elevator B:-Service elevator C:-Freight elevator D:-Capsu|e elevator
Ans: C
72:-A standard metric thread having 3 mm pitch on 40 mm diameter designated as.
A:-40 x 3m
B:-M40 x 3
C:-40 X 3
D:-M 403
Ans: B
73:-Maximum travel height of a roped holeless hydraulic elevator is
A:-6 m B:-9 m C:-12 m D:-18 m
Ans: D
74:-To unlock door interlock when the cabin comes at the floor level in a manually operated doors.
A:-Returning cams B:-Limit cam C:-Toe guard D:-Lock roller
Ans: A
75:-The portion of a building or structure used for discharge of passenger or goods into or from a lift car.
A:-Lift door B:-Lift beam C:-Lift pit D:-Lift landing
Ans: D
76:-On a triple thread screw, lead equals.
A:-l/3 of pitch B:-2/3 of pitch C:-2/3 of pitch D:-3 times of pitch
Ans: D
77:-|n a ball bearing balls are subjected to.
A:-Compressive stress B:-Shear stress C:-Fatigue D:-Tensi|e stress
Ans: C
78:-Bronze is welded by
A:-Neutral flame
B:-Carburizing flame
C:-Oxidizing flame
D:-All of these
Ans: C
79:-The device designed to stop a descending car or counter weight beyond its normal limit.
A:-Returning cam B:-Pit switch C:-Buffer D:-Header assembly
Ans: C
80:-The elevator car is suspended on the main rope by means of a frame called.
A:-S|ing B:-Buffer
C:-Machine unit D:-Car body
Ans: A
81:-While chipping the slag or grinding which is used to protect eyes.
A:-Dark glass B:-Sun glass
C:-Mask D:-Goggles
Ans: D
82:-ln which of the following drives there is no slip.
A:-Open belt drive B:-Crossed belt drive
C:-Rope drive D:-Chain drive
Ans: D
83:-The point angle of centre punch is.
A:-30°
B:-45°
C:-90°
D:-120°
Ans: C
84:-The welding process that uses non-consumable electrode is
A:-TIG welding
B:-MIG welding
C:-Manual Arc welding
D:-Submerged Arc welding
Ans: A
85:-Washer is used to
A:-Fill up the axial gap B:-Provide bearing area
C:-Provide cushioning effect D:-Absorb shocks and vibrations
Ans: B
86:-A flange coupling is used to connect two shafts
A:-Perfectly aligned B:-Not in exact alignment
C:-Lateral misalignment D:-Axes intersect at a small angle
Ans: A
87:-What does COP stand for?
A:-Car Operating Pannel B:-Clean Oil Pits
C:-Car Outside pannel D:-Clean Outside Parts
Ans: A
88:-What is the purpose of counter weight?
A:-Ba|ance the weight of rope B:-Balance the weight of car
C:-Control the door of the car D:-Ba|ance the weight of cables
Ans: B
89. Radial height of a tooth above the pitch circle of a spur gear is:
(A) dedendum (B) pitch point (C) tooth face (D) addendum
Ans: D
90. Connecting link between the piston rod and ––––––––––––– of a steam engine is cross head.
(A) cylinder (B) valve (C) connecting rod (D) eccentrics
Ans: C
91. Which one of the following is not a locking device?
(A) Locking by plate (B) Split pin (C) Lock washers (D) Hexagonal bolt
Ans: D
92. Ratio between inertia forces to viscous forces is known as:
(A) Reynolds’s number (B) Poisson’s ratio (C) Power factor (D) Strain
Ans: A
93. The point about which the body can be assumed to be rotating at the given instant is called ––––––––––––– of rotation.
(A) instantaneous retardation (B) instantaneous motion (C) instantaneous plane (D) instantaneous center
Ans: D
94. The absolute pressure of a given mass of a perfect gas varies inversely as its volume when the ––––––––––––– remains constant.
(A) volume (B) temperature (C) flow (D) velocity
Ans: B
95. A machine which converts mechanical energy in to pressure energy is known as:
(A) engine (B) generator (C) pump (D) motor
Ans: C
96. In double acting reciprocating pumps, the water is acting on ––––––––––––– sides of the piston.
(A) both (B) one (C) either in one or two (D) nearer
Ans: A
97. In order to produce air tight reveted joint ––––––––––––– process is required.
(A) bevelling (B) caulking (C) fillering (D) sealing
Ans: B
98. Least count of a vernier caliper is ––––––––––––– mm.
(A) 0.002 (B) 0.01 (C) 0.02 (D) 0.001
Ans: C
99. H9 holes can be produced by ––––––––––––– process.
(A) punching and enlarging (B) drilling and chamfering (C) counter sunking and drilling (D) boring and reaming
Ans: D
100. The device used to connect two shafts together at their ends for the purpose of transmitting power is known as:
(A) sleeve (B) coupling (C) bearing (D) nipples
Ans: B
A:-10° - 20°
B:-20° - 30°
C:-30° - 40°
D:-60° - 70°
Ans: C
52:-Why rotatable bevels are used in dial indicator
A:-The work of machine setting B:-Acts as an offset attachment
C:-Prevent shocks D:-For making final zero setting
Ans: D
53:-The connection link used to make a connection between sling and load to be lifted is
A:-Pu||ey B:-Shack|e C:-Hoist D:-Derricks
Ans: B
54:-Rivet used for structural application is
A:-Pan head B:-Snap head C:-Mush room head D:-Counter sunk head
Ans: B
55:-The arc used in Electric Arc welding is
A:-Low voltage high current B:-High voltage high current
C:-Low voltage low current D:-High voltage low current
Ans: A
56:-The flux used in brazing
A:-Zinc chloride B:-Borax C:-Ammonium chloride D:-Alcohol
Ans: B
57:-How many types of foundations are there based on depth?
A:-3
B:-4
C:-5
D:-2
Ans: D
58:-Size of a wire rope specified by its.
A:-Nominal diameter B:-Number of strands C:-Number of wire per strand D:-Length of wire
Ans: A
59:-A hacksaw blade specified by its.
A:-Length B:-Material C:-Width D:-Number of teeth
Ans: A
60:-Which of the following is a solid lubricant?
A:-Copper B:-Molybdenum C:-Graphite D:-Oil
Ans: C
61:-A device which acts as stopping mechanism when the elevator runs beyond its rated speed.
A:-Limit switch B:-Over speed governor
C:-Hydrau|ic ram D:-Traction sheave
Ans: B
62:-One Micrometer is equal to.
A:-0.1mm
B:-0.01mm
C:-0.001mm
D:-0.0001mm
Ans: C
63:-If the belt of an electric motor is broken, it needs the following type of maintenance
A:-Corrective B:-Scheduled C:-Preventive D:-Timely
Ans: A
64:-Type of maintenance is done before failure.
A:-Preventive B:-Running C:-Break down D:-Scheduled
Ans: A
65:-The device which connects the elevator car and landing doors without backlash.
A:-Door track B:-Door coupler
C:-Door contact D:-Door motor
Ans: B
66:-|t is used to know the elevator car position.
A:-Landing push button
B:-Floor position indicator
C:-Door contact
D:-Door sill
Ans: B
67:-Which of the following is not a safety device on an elevator?
A:-Door lock B:-Over speed governor
C:-Call button D:-Limit switch
Ans: C
68:-Compensating ropes are generally required on elevators when the travel is.
A:-5 M B:-10 M C:-20 M D:-30 M or greater
Ans: D
69:-A cylindrical rod with both ends threaded is known as.
A:-Bo|t B:-Tap bolt C:-Stud D:-Set-screw
Ans: C
70:-Sliding part between elevator guide rail and car.
A:-Thimb|e rod B:-Guide shoe C:-Bu||dog grip D:-Safety edge
Ans: B
71:-The elevator which is used to transport goods.
A:-Passenger elevator B:-Service elevator C:-Freight elevator D:-Capsu|e elevator
Ans: C
72:-A standard metric thread having 3 mm pitch on 40 mm diameter designated as.
A:-40 x 3m
B:-M40 x 3
C:-40 X 3
D:-M 403
Ans: B
73:-Maximum travel height of a roped holeless hydraulic elevator is
A:-6 m B:-9 m C:-12 m D:-18 m
Ans: D
74:-To unlock door interlock when the cabin comes at the floor level in a manually operated doors.
A:-Returning cams B:-Limit cam C:-Toe guard D:-Lock roller
Ans: A
75:-The portion of a building or structure used for discharge of passenger or goods into or from a lift car.
A:-Lift door B:-Lift beam C:-Lift pit D:-Lift landing
Ans: D
76:-On a triple thread screw, lead equals.
A:-l/3 of pitch B:-2/3 of pitch C:-2/3 of pitch D:-3 times of pitch
Ans: D
77:-|n a ball bearing balls are subjected to.
A:-Compressive stress B:-Shear stress C:-Fatigue D:-Tensi|e stress
Ans: C
78:-Bronze is welded by
A:-Neutral flame
B:-Carburizing flame
C:-Oxidizing flame
D:-All of these
Ans: C
79:-The device designed to stop a descending car or counter weight beyond its normal limit.
A:-Returning cam B:-Pit switch C:-Buffer D:-Header assembly
Ans: C
80:-The elevator car is suspended on the main rope by means of a frame called.
A:-S|ing B:-Buffer
C:-Machine unit D:-Car body
Ans: A
81:-While chipping the slag or grinding which is used to protect eyes.
A:-Dark glass B:-Sun glass
C:-Mask D:-Goggles
Ans: D
82:-ln which of the following drives there is no slip.
A:-Open belt drive B:-Crossed belt drive
C:-Rope drive D:-Chain drive
Ans: D
83:-The point angle of centre punch is.
A:-30°
B:-45°
C:-90°
D:-120°
Ans: C
84:-The welding process that uses non-consumable electrode is
A:-TIG welding
B:-MIG welding
C:-Manual Arc welding
D:-Submerged Arc welding
Ans: A
85:-Washer is used to
A:-Fill up the axial gap B:-Provide bearing area
C:-Provide cushioning effect D:-Absorb shocks and vibrations
Ans: B
86:-A flange coupling is used to connect two shafts
A:-Perfectly aligned B:-Not in exact alignment
C:-Lateral misalignment D:-Axes intersect at a small angle
Ans: A
87:-What does COP stand for?
A:-Car Operating Pannel B:-Clean Oil Pits
C:-Car Outside pannel D:-Clean Outside Parts
Ans: A
88:-What is the purpose of counter weight?
A:-Ba|ance the weight of rope B:-Balance the weight of car
C:-Control the door of the car D:-Ba|ance the weight of cables
Ans: B
89. Radial height of a tooth above the pitch circle of a spur gear is:
(A) dedendum (B) pitch point (C) tooth face (D) addendum
Ans: D
90. Connecting link between the piston rod and ––––––––––––– of a steam engine is cross head.
(A) cylinder (B) valve (C) connecting rod (D) eccentrics
Ans: C
91. Which one of the following is not a locking device?
(A) Locking by plate (B) Split pin (C) Lock washers (D) Hexagonal bolt
Ans: D
92. Ratio between inertia forces to viscous forces is known as:
(A) Reynolds’s number (B) Poisson’s ratio (C) Power factor (D) Strain
Ans: A
93. The point about which the body can be assumed to be rotating at the given instant is called ––––––––––––– of rotation.
(A) instantaneous retardation (B) instantaneous motion (C) instantaneous plane (D) instantaneous center
Ans: D
94. The absolute pressure of a given mass of a perfect gas varies inversely as its volume when the ––––––––––––– remains constant.
(A) volume (B) temperature (C) flow (D) velocity
Ans: B
95. A machine which converts mechanical energy in to pressure energy is known as:
(A) engine (B) generator (C) pump (D) motor
Ans: C
96. In double acting reciprocating pumps, the water is acting on ––––––––––––– sides of the piston.
(A) both (B) one (C) either in one or two (D) nearer
Ans: A
97. In order to produce air tight reveted joint ––––––––––––– process is required.
(A) bevelling (B) caulking (C) fillering (D) sealing
Ans: B
98. Least count of a vernier caliper is ––––––––––––– mm.
(A) 0.002 (B) 0.01 (C) 0.02 (D) 0.001
Ans: C
99. H9 holes can be produced by ––––––––––––– process.
(A) punching and enlarging (B) drilling and chamfering (C) counter sunking and drilling (D) boring and reaming
Ans: D
100. The device used to connect two shafts together at their ends for the purpose of transmitting power is known as:
(A) sleeve (B) coupling (C) bearing (D) nipples
Ans: B
· UPSC Exam Syllabus- Mechanical Engineering
· Mechanical Engineering
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