MECHANICAL ENGINEERING- PAGE 11
Mechanical Engineering MCQs- Page 11
1. The product of mass and velocity is known as
(a) Impulse (b) Momentum (c) Power (d) Work
Ans: B
2. The co-efficient of friction depends on
(a) Area of contact (b) Shape of surfaces (c) Strength of surfaces (d) Nature of surfaces
Ans: D
3. Angle of friction is the
(a) Angle between normal reaction and the resultant of normal reaction and the limiting frictional force
(b) Ratio of limiting friction and normal reaction
(c) Ratio of static and dynamic friction
(d) None of the above
Ans: A
4. A machine is one that
(a) transfer motion (b) does useful work (c) have relative motion between links (d) have a number of members
Ans: B
5. The ratio of linear stress to the linear strain is called
(a) Modulus of rigidity (b) Modulus of elasticity (c) Bulk modulus (d) Poisson’s ratio
Ans: B
6. Limiting force of friction is defined as the frictional force which exists when a body
(a) is moving with maximum velocity (b) is stationary (c) just begins to slide over the surface (d) None of these
Ans: C
7. Quality management standards are controlled by
(a) ISO 7000 (b) ISO 8000 (c) ISO 9000 (d) ISO 14000
Ans: C
8. The value of Poisson’s ratio is always
(a) more than 1 (b) 1 (c) less than 1 (d) None of these
Ans: C
9. Which of the following production system is characterised by the low production volume ?
(a) Project Production System (b) Job Shop Production System (c) Batch Production System (d) Mass Production System
Ans: B
10. Basic tool in work study is
(a) Graph paper (b) Process chart (c) Planning chart (d) Stop-watch
Ans: D
11. Bow’s notation is used to indicate
(a) forces (b) moment (c) pressure (d) velocity
Ans: A
12. In thin cylindrical shell, the value of circumferential stress as compared to the longitudinal stress is
(a) Equal (b) Double (c) Triple (d) None of these
Ans: B
13. In comparison to rolling friction, the value of sliding friction is
(a) more (b) less (c) equal (d) double
Ans: A
14. Which of the following has quick return mechanism ?
(a) Shaper (b) Drilling machine (c) Printing press (d) Milling machine Ans: A
15. The ratio of limiting force and normal reaction is known as
(a) co-efficient of friction (b) angle of friction (c) angle of repose (d) frictional resistance
Ans: A
16. Which one of the following is not a unit of energy ?
(a) Newton-metre (b) kCal (c) Watt (d) Watt-hours
Ans: C
17. Process layout is employed for
(a) Batch production (b) Continuous type of production (c) Effective utilisation of machines (d) None of these Ans: A
18. Moment of inertia of a body does not depend upon
(a) mass of the body (b) distribution of mass in the body (c) axis of rotation of the body (d) angular velocity of the body
Ans: D
19. A body in Simple Harmonic Motion will have maximum velocity when its amplitude is
(a) maximum (b) negative maximum (c) zero (d) average
Ans: C
20. A simply supported beam AB of length 9 m, carries a uniformly distributed load of 10 kN/m for a distance of 6 m from end A. What are the reaction forces at A and at B ?
(a) 40 N and 20 N (b) 60 N and 20 N (c) 20 N and 60 N (d) 30 N and 15 N
Ans: A
21. An effort of 100 N is applied to a machine to lift a load of 900 N. The distance moved by the effort is 100 cm. The load is raised through a distance of 10 cm. What is the efficiency of the machine ?
(a) 80% (b) 90% (c) 70% (d) 60%
Ans: B
22. For a perfect frame, the number of joints (j) and the number of members (n) are given by
(a) n = 2j – 3 (b) j = 2n – 3 (c) n = j – 3 (d) j = n – 3
Ans: A
23. A body of weight 100 N is placed on a rough horizontal plane. What will be the co-efficient of friction between surfaces if a horizontal force of 60 N just causes the body to slide over the horizontal plane ?
(a) 0.3 (b) 0.4 (c) 0.5 (d) 0.6
Ans: D
24. Which of the following safety measures is used to promote the safety ?
(a) Excessive fine (b) Writing slogans (c) Stopping the work (d) All of these Ans: B
25. Which of the following is not significant in determination of economic order quantity in inventory control ?
(a) Ordering cost (b) Lead time (c) Inventory carrying cost (d) All of these
Ans: B
26. Which layout is suitable for multi-product company carrying out batch production ?
(a) Product layout (b) Process layout (c) Point layout (d) All of these
Ans: B
27. The chart used in Quality Control is/are
(a) C-chart (b) R-chart (c) P-chart (d) All of these
Ans: D
28. Jet engine works on the principle of
(a) conservation of energy (b) conservation of linear momentum (c) Earth’s gravity (d) None of these
Ans: B
29. Young’s modulus of elasticity for a perfectly rigid body is
(a) zero (b) unity (c) infinity (d) cannot be known
Ans: C
30. Which of the following concurrent forces cannot have a resultant of 4N ?
(a) 2N and 4N (b) 2N and 6N (c) 2N and 8N (d) All of these
Ans: C
31. Factor of safety is the ratio of
(a) breaking stress to working stress (b) endurance limit to yield stress
(c) elastic limit to ultimate stress (d) ultimate stress to working stress
Ans: D
32. The working surface above the pitch surface of the gear tooth is termed as
(a) Addendum (b) Dedendum (c) Face (d) Flank
Ans: C
33. Plant layout used for automobile assembly unit is
(a) Product layout (b) Process layout (c) Point layout (d) Static layout Ans: A
34. Crowning on pulleys helps
(a) in increasing velocity ratio. (b) for automatic adjustment of belt so that belt runs centrally.
(c) increase the belt life. (d) decrease initial tension.
Ans: B
35. For a governor running at constant speed, the force acting on the sleeve is
(a) constant (b) minimum (c) maximum (d) zero
Ans: D
36. For maximum power to be transmitted by the belt, the maximum permissible tension in the belt is
(a) equal to centrifugal tension (b) twice the centrifugal tension
(c) thrice the centrifugal tension (d) four-times the centrifugal tension
Ans: C
37. The factor that decides the size of the cam is
(a) prime circle (b) pitch circle (c) base circle (d) pitch curve
Ans: C
38. Sensitiveness of governor is defined as
(a) Range of speed/Mean speed
(b) Mean speed/Range of speed
(c) Mean speed × Range of speed
(d) None of these
Ans: A
39. Cam converts the rotary motion into
(a) rotary motion (b) translatory motion (c) both rotary and translatory motions (d) None of these
Ans: B
40. The creep in a belt drive is due to
(a) material of the pulleys (b) material of the belt (c) unequal size of pulleys (d) unequal tensions and slackness of the belt
Ans: D
41. Backlash in gears is
(a) Addendum + Dedendum (b) Circular pitch + Tooth thickness
(c) Space width between two teeth – Tooth thickness (d) None of the above
Ans: C
42. In spur gears
(a) Both shafts are parallel. (b) Teeth are straight. (c) Teeth are parallel to axis. (d) All of these.
Ans: D
43. Angle moved by the cam during which follower remains at its highest position is called
(a) Angle of dwell (b) Angle of descent (c) Angle of ascent (d) Angle of action
Ans: A
44. Which of the following layout is useful when the product being processed is very big, heavy or difficult to move ?
(a) Fixed position layout (b) Process layout (c) Product layout (d) Cellular layout Ans: A
45. Work study is mainly aimed at
(a) determining the most efficient method of performing a job. (b) estimating the minimum time of completion of job.
(c) developing the standard method and standard time for a job. (d) economizing the motions involved on the part of the work while performing a job.
Ans: C
46. Piston, piston rod and cross-head of a steam engine constitute
(a) one link (b) two link (c) three link (d) Do not constitute any link.
Ans: A
47. Which of the followings is a higher pair ?
(a) Belt and pulley (b) Turning pair (c) Screw pair (d) Sliding pair
Ans: A
48. In a compound gear train there is
(a) only one gear on each shaft. (b) more than one gear on a shaft. (c) no gear on driving shaft. (d) None of these
Ans: B
49. For oil-pumps in small IC engines which gears can be used ?
(a) Spur gears (b) Crossed helical gears (c) Gear train (d) None of these
Ans: A
50. In involute gears, pressure angle is
(a) dependent on size of teeth (b) dependent on size of gear (c) zero (d) always constant
Ans: D
(a) Impulse (b) Momentum (c) Power (d) Work
Ans: B
2. The co-efficient of friction depends on
(a) Area of contact (b) Shape of surfaces (c) Strength of surfaces (d) Nature of surfaces
Ans: D
3. Angle of friction is the
(a) Angle between normal reaction and the resultant of normal reaction and the limiting frictional force
(b) Ratio of limiting friction and normal reaction
(c) Ratio of static and dynamic friction
(d) None of the above
Ans: A
4. A machine is one that
(a) transfer motion (b) does useful work (c) have relative motion between links (d) have a number of members
Ans: B
5. The ratio of linear stress to the linear strain is called
(a) Modulus of rigidity (b) Modulus of elasticity (c) Bulk modulus (d) Poisson’s ratio
Ans: B
6. Limiting force of friction is defined as the frictional force which exists when a body
(a) is moving with maximum velocity (b) is stationary (c) just begins to slide over the surface (d) None of these
Ans: C
7. Quality management standards are controlled by
(a) ISO 7000 (b) ISO 8000 (c) ISO 9000 (d) ISO 14000
Ans: C
8. The value of Poisson’s ratio is always
(a) more than 1 (b) 1 (c) less than 1 (d) None of these
Ans: C
9. Which of the following production system is characterised by the low production volume ?
(a) Project Production System (b) Job Shop Production System (c) Batch Production System (d) Mass Production System
Ans: B
10. Basic tool in work study is
(a) Graph paper (b) Process chart (c) Planning chart (d) Stop-watch
Ans: D
11. Bow’s notation is used to indicate
(a) forces (b) moment (c) pressure (d) velocity
Ans: A
12. In thin cylindrical shell, the value of circumferential stress as compared to the longitudinal stress is
(a) Equal (b) Double (c) Triple (d) None of these
Ans: B
13. In comparison to rolling friction, the value of sliding friction is
(a) more (b) less (c) equal (d) double
Ans: A
14. Which of the following has quick return mechanism ?
(a) Shaper (b) Drilling machine (c) Printing press (d) Milling machine Ans: A
15. The ratio of limiting force and normal reaction is known as
(a) co-efficient of friction (b) angle of friction (c) angle of repose (d) frictional resistance
Ans: A
16. Which one of the following is not a unit of energy ?
(a) Newton-metre (b) kCal (c) Watt (d) Watt-hours
Ans: C
17. Process layout is employed for
(a) Batch production (b) Continuous type of production (c) Effective utilisation of machines (d) None of these Ans: A
18. Moment of inertia of a body does not depend upon
(a) mass of the body (b) distribution of mass in the body (c) axis of rotation of the body (d) angular velocity of the body
Ans: D
19. A body in Simple Harmonic Motion will have maximum velocity when its amplitude is
(a) maximum (b) negative maximum (c) zero (d) average
Ans: C
20. A simply supported beam AB of length 9 m, carries a uniformly distributed load of 10 kN/m for a distance of 6 m from end A. What are the reaction forces at A and at B ?
(a) 40 N and 20 N (b) 60 N and 20 N (c) 20 N and 60 N (d) 30 N and 15 N
Ans: A
21. An effort of 100 N is applied to a machine to lift a load of 900 N. The distance moved by the effort is 100 cm. The load is raised through a distance of 10 cm. What is the efficiency of the machine ?
(a) 80% (b) 90% (c) 70% (d) 60%
Ans: B
22. For a perfect frame, the number of joints (j) and the number of members (n) are given by
(a) n = 2j – 3 (b) j = 2n – 3 (c) n = j – 3 (d) j = n – 3
Ans: A
23. A body of weight 100 N is placed on a rough horizontal plane. What will be the co-efficient of friction between surfaces if a horizontal force of 60 N just causes the body to slide over the horizontal plane ?
(a) 0.3 (b) 0.4 (c) 0.5 (d) 0.6
Ans: D
24. Which of the following safety measures is used to promote the safety ?
(a) Excessive fine (b) Writing slogans (c) Stopping the work (d) All of these Ans: B
25. Which of the following is not significant in determination of economic order quantity in inventory control ?
(a) Ordering cost (b) Lead time (c) Inventory carrying cost (d) All of these
Ans: B
26. Which layout is suitable for multi-product company carrying out batch production ?
(a) Product layout (b) Process layout (c) Point layout (d) All of these
Ans: B
27. The chart used in Quality Control is/are
(a) C-chart (b) R-chart (c) P-chart (d) All of these
Ans: D
28. Jet engine works on the principle of
(a) conservation of energy (b) conservation of linear momentum (c) Earth’s gravity (d) None of these
Ans: B
29. Young’s modulus of elasticity for a perfectly rigid body is
(a) zero (b) unity (c) infinity (d) cannot be known
Ans: C
30. Which of the following concurrent forces cannot have a resultant of 4N ?
(a) 2N and 4N (b) 2N and 6N (c) 2N and 8N (d) All of these
Ans: C
31. Factor of safety is the ratio of
(a) breaking stress to working stress (b) endurance limit to yield stress
(c) elastic limit to ultimate stress (d) ultimate stress to working stress
Ans: D
32. The working surface above the pitch surface of the gear tooth is termed as
(a) Addendum (b) Dedendum (c) Face (d) Flank
Ans: C
33. Plant layout used for automobile assembly unit is
(a) Product layout (b) Process layout (c) Point layout (d) Static layout Ans: A
34. Crowning on pulleys helps
(a) in increasing velocity ratio. (b) for automatic adjustment of belt so that belt runs centrally.
(c) increase the belt life. (d) decrease initial tension.
Ans: B
35. For a governor running at constant speed, the force acting on the sleeve is
(a) constant (b) minimum (c) maximum (d) zero
Ans: D
36. For maximum power to be transmitted by the belt, the maximum permissible tension in the belt is
(a) equal to centrifugal tension (b) twice the centrifugal tension
(c) thrice the centrifugal tension (d) four-times the centrifugal tension
Ans: C
37. The factor that decides the size of the cam is
(a) prime circle (b) pitch circle (c) base circle (d) pitch curve
Ans: C
38. Sensitiveness of governor is defined as
(a) Range of speed/Mean speed
(b) Mean speed/Range of speed
(c) Mean speed × Range of speed
(d) None of these
Ans: A
39. Cam converts the rotary motion into
(a) rotary motion (b) translatory motion (c) both rotary and translatory motions (d) None of these
Ans: B
40. The creep in a belt drive is due to
(a) material of the pulleys (b) material of the belt (c) unequal size of pulleys (d) unequal tensions and slackness of the belt
Ans: D
41. Backlash in gears is
(a) Addendum + Dedendum (b) Circular pitch + Tooth thickness
(c) Space width between two teeth – Tooth thickness (d) None of the above
Ans: C
42. In spur gears
(a) Both shafts are parallel. (b) Teeth are straight. (c) Teeth are parallel to axis. (d) All of these.
Ans: D
43. Angle moved by the cam during which follower remains at its highest position is called
(a) Angle of dwell (b) Angle of descent (c) Angle of ascent (d) Angle of action
Ans: A
44. Which of the following layout is useful when the product being processed is very big, heavy or difficult to move ?
(a) Fixed position layout (b) Process layout (c) Product layout (d) Cellular layout Ans: A
45. Work study is mainly aimed at
(a) determining the most efficient method of performing a job. (b) estimating the minimum time of completion of job.
(c) developing the standard method and standard time for a job. (d) economizing the motions involved on the part of the work while performing a job.
Ans: C
46. Piston, piston rod and cross-head of a steam engine constitute
(a) one link (b) two link (c) three link (d) Do not constitute any link.
Ans: A
47. Which of the followings is a higher pair ?
(a) Belt and pulley (b) Turning pair (c) Screw pair (d) Sliding pair
Ans: A
48. In a compound gear train there is
(a) only one gear on each shaft. (b) more than one gear on a shaft. (c) no gear on driving shaft. (d) None of these
Ans: B
49. For oil-pumps in small IC engines which gears can be used ?
(a) Spur gears (b) Crossed helical gears (c) Gear train (d) None of these
Ans: A
50. In involute gears, pressure angle is
(a) dependent on size of teeth (b) dependent on size of gear (c) zero (d) always constant
Ans: D
51. Indian Boiler Act, 1923 is applicable to
(a) all boilers (b) boilers more than 100 litres capacity (c) boilers more than 1000 litres capacity (d) None of the above Ans: B
52. The size of gear is usually specified by
(a) pressure angle (b) pitch circle diameter (c) circular pitch (d) diametral pitch
Ans: B
53. A cam and follower mechanisms constitutes a/an
(a) open pair (b) screw pair (c) closed pair (d) spherical pair
Ans: C
54. Which of the followings, leads to industrial hazards and causes accidents ?
(a) Noise and vibrations (b) Poor lighting and Poor ventilation (c) Heat and Humidity (d) All of these Ans: D
55. A Portor governor could be classified as
(a) inertia type governor (b) pendulum type governor (c) centrifugal governor (d) dead weight type governor
Ans: D
56. Which one of the following is not a friction clutch ?
(a) Disc or plate clutch (b) Cone clutch (c) Centrifugal clutch (d) Jaw clutch
Ans: D
57. Which of the followings helps in accident control ?
(a) Automatic safety guard (b) Interlock safety guard (c) Trip safety guard (d) All of these Ans: D
58. The product of circular pitch and diametral pitch is equal to
(a) 1 (b) 1.57 (c) π (d) Infinite
Ans: C
59. Axial thrust is minimum in case of
(a) Spur gear (b) Bevel gear (c) Mitre gear (d) Double helical gear
Ans: D
60. Which of the following brakes is commonly used in motor cars ?
(a) Band Brake (b) Shoe Brake (c) Band and Block Brake (d) Internal Expanding Shoe Brake
Ans: D
61. Outside diameter of a hollow shaft is twice its inside diameter. Ratio of torque carrying capacity to that of a solid shaft of same outside diameter and same material is
(a) 3/4 (b) 15/16 (c) 1/2 (d) 1/16
Ans: B
62. Standard time is defined as
(a) Normal time + allowance (b) Normal time + idle time (c) Normal time + idle time + allowance (d) None of these Ans: A
63. A dead load is one that
(a) remains constant (b) varies with time (c) cannot be determined (d) whose value is zero
Ans: A
64. What is the unit of strain ?
(a) Centimetre (b) Millimetre (c) Micron (d) None of these
Ans: D
65. Which of the following statements is correct ?
(a) Stress is proportional to strain. (b) Stress is force per unit area.
(c) Within elastic limit, the ratio of stress to strain is called Young’s modulus. (d) All of the above
Ans: D
66. Spring index is
(a) Ratio of coil diameter to wire diameter. (b) Load required to produce unit deflection.
(c) Its capability of storing energy. (d) None of the above
Ans: A
67. When two springs (each having stiffness constant K) are connected in series, the equivalent stiffness will be
(a) K
(b) 2K
(c) K/2
(d) 1/ K
Ans: C
68. In a beam, the point of contra flexure is a point where
(a) Shear force is maximum. (b) Shear force is zero. (c) Bending moment changes its sign. (d) Bending moment is maximum.
Ans: C
69. Spiral springs are used in
(a) Cycles (b) Scooters (c) Watches (d) Railway Wagons
Ans: C
(a) all boilers (b) boilers more than 100 litres capacity (c) boilers more than 1000 litres capacity (d) None of the above Ans: B
52. The size of gear is usually specified by
(a) pressure angle (b) pitch circle diameter (c) circular pitch (d) diametral pitch
Ans: B
53. A cam and follower mechanisms constitutes a/an
(a) open pair (b) screw pair (c) closed pair (d) spherical pair
Ans: C
54. Which of the followings, leads to industrial hazards and causes accidents ?
(a) Noise and vibrations (b) Poor lighting and Poor ventilation (c) Heat and Humidity (d) All of these Ans: D
55. A Portor governor could be classified as
(a) inertia type governor (b) pendulum type governor (c) centrifugal governor (d) dead weight type governor
Ans: D
56. Which one of the following is not a friction clutch ?
(a) Disc or plate clutch (b) Cone clutch (c) Centrifugal clutch (d) Jaw clutch
Ans: D
57. Which of the followings helps in accident control ?
(a) Automatic safety guard (b) Interlock safety guard (c) Trip safety guard (d) All of these Ans: D
58. The product of circular pitch and diametral pitch is equal to
(a) 1 (b) 1.57 (c) π (d) Infinite
Ans: C
59. Axial thrust is minimum in case of
(a) Spur gear (b) Bevel gear (c) Mitre gear (d) Double helical gear
Ans: D
60. Which of the following brakes is commonly used in motor cars ?
(a) Band Brake (b) Shoe Brake (c) Band and Block Brake (d) Internal Expanding Shoe Brake
Ans: D
61. Outside diameter of a hollow shaft is twice its inside diameter. Ratio of torque carrying capacity to that of a solid shaft of same outside diameter and same material is
(a) 3/4 (b) 15/16 (c) 1/2 (d) 1/16
Ans: B
62. Standard time is defined as
(a) Normal time + allowance (b) Normal time + idle time (c) Normal time + idle time + allowance (d) None of these Ans: A
63. A dead load is one that
(a) remains constant (b) varies with time (c) cannot be determined (d) whose value is zero
Ans: A
64. What is the unit of strain ?
(a) Centimetre (b) Millimetre (c) Micron (d) None of these
Ans: D
65. Which of the following statements is correct ?
(a) Stress is proportional to strain. (b) Stress is force per unit area.
(c) Within elastic limit, the ratio of stress to strain is called Young’s modulus. (d) All of the above
Ans: D
66. Spring index is
(a) Ratio of coil diameter to wire diameter. (b) Load required to produce unit deflection.
(c) Its capability of storing energy. (d) None of the above
Ans: A
67. When two springs (each having stiffness constant K) are connected in series, the equivalent stiffness will be
(a) K
(b) 2K
(c) K/2
(d) 1/ K
Ans: C
68. In a beam, the point of contra flexure is a point where
(a) Shear force is maximum. (b) Shear force is zero. (c) Bending moment changes its sign. (d) Bending moment is maximum.
Ans: C
69. Spiral springs are used in
(a) Cycles (b) Scooters (c) Watches (d) Railway Wagons
Ans: C
70. Break Even point represents
(a) Profit (b) Loss (c) No Profit and No Loss (d) None of these
Ans: C
71. Per cent idle time for men and machine is found by
(a) Work sampling (b) Time study (c) Method study (d) Work study
Ans: A
72. Which of the followings control chart is variable control chart ?
(a) P-chart (b) C-chart (c) U-chart (d) R-chart
Ans: D
73. Which of the following material handling devices are used for the movement of materials in a fixed route and fixed area of operation ? (a) Cranes (b) Pallets (c) Industrial Trucks (d) Elevators
Ans: A
74. In ABC analysis, A-type inventory represents
(a) High value, High volume (b) High value, Low volume (c) Low value, Low volume (d) Low value, High volume
Ans: B
75. According to the definition of “week” under the Factory Act, 1948, it is a period of 7 days beginning at midnight on
(a) Sunday (b) Monday (c) Saturday (d) Friday
Ans: C
76. A rivet is specified by
(a) shank diameter (b) type of load (c) length of rivet (d) None of these
Ans: A
77. A steel bar of 5 m length is heated from 15 °C to 90 °C and is free to expand. The bar will induce
(a) Tensile stress (b) Shear stress (c) No stress (d) None of these
Ans: C
78. No. of inversions in a slider crank mechanism is
(a) 1 (b) 2 (c) 4 (d) 6
Ans: C
79. Elastic modulus of steel is
(a) 70 GPa (b) 210 GPa (c) 250 GPa (d) 300 GPa
Ans: B
80. For proper design of a shaft, it should be designed on the basis of
(a) Maximum principal stress theory (b) Maximum shear stress theory (c) Both (a) and (b) (d) Maximum strain theory
Ans: C
81. Rivets are made of following type of material :
(a) Brittle (b) Low density (c) Ductile (d) Low melting point
Ans: C
82. Which theory is best to estimate failure load for a ductile material ?
(a) Distortion energy theorem (b) Maximum strain energy theorem (c) Maximum shear stress theorem (d) None of these
Ans: C
83. What is the number of jaws in a self centred chuck of a lathe ?
(a) Eight (b) Five (c) Four (d) Three
Ans: D
84. Which one is not a part of cotter joint ?
(a) Socket (b) Spigot (c) Fork end (d) Collar
Ans: C
85. For transmitting power without slip, drive used is
(a) Rope drive (b) Belt drive (c) Cone drive (d) Chain drive
Ans: D
86. Nichrome is used in
(a) Gas turbine (b) Air craft engine (c) Heater element (d) Brake lining
Ans: C
87. In case of straight turning operation, length of work piece is 120 mm and feed rate is 0.25 mm/sec. How long will it take to complete the turning operation ?
(a) 8 minute (b) 10 minute (c) 12 minute (d) None of these
Ans: A
88. In leaf springs, the longest leaf is known as
(a) Lower leaf (b) Master leaf (c) Upper leaf (d) None of these
Ans: B
89. The rated life of a bearing varies
(a) Directly with load (b) Inversely as square of load (c) Inversely as cube of load (d) None of these
Ans: C
90. In design of flange coupling, the weakest element should be
(a) Key (b) Bolt (c) Flange (d) Shaft
Ans: A
91. A knuckle pin may fail in
(a) Shear (b) Bending (c) Crushing (d) All of these
Ans: D
92. A cotter joint is used to connect two rods which are in
(a) Tension only (b) Compression only (c) Tension and Compression (d) Shear only
Ans: C
93. Parallel fillet welded joints are designed for
(a) Tensile strength (b) Compressive strength (c) Bending strength (d) Shear strength
Ans: D
94. Initial cost of making a product is ` 1,00,000 and variable cost per unit is ` 40. If its selling price is ` 80 per unit, what would be the break even quantity ?
(a) 2500 units (b) 3500 units (c) 5000 units (d) 7000 units
Ans: A
95. What strength is to be considered for ductile material under cyclic load ?
(a) Ultimate strength (b) Yield strength (c) Endurance strength (d) Fracture strength
Ans: C
96. Which of the following is the an amorphous material ?
(a) Lead (b) Brass (c) Glass (d) Silver
Ans: C
97. Which of the following is a case hardening process ?
(a) Carburizing (b) Nitriding (c) Cynading (d) All of these
Ans: D
98. The chisel used for cutting steel sheets is usually
(a) Annealed (b) Normalised (c) Hardened (d) Hardened and Tempered
Ans: D
99. Addition of Nickel to Steel helps in improving
(a) Fatigue resistance (b) Creep resistance (c) Corrosion resistance (d) Cost reduction
Ans: A
100. The machinability of steel can be improved by alloying the steel with
(a) Copper (b) Chromium (c) Nickel (d) Sulphur
Ans: D
(a) Profit (b) Loss (c) No Profit and No Loss (d) None of these
Ans: C
71. Per cent idle time for men and machine is found by
(a) Work sampling (b) Time study (c) Method study (d) Work study
Ans: A
72. Which of the followings control chart is variable control chart ?
(a) P-chart (b) C-chart (c) U-chart (d) R-chart
Ans: D
73. Which of the following material handling devices are used for the movement of materials in a fixed route and fixed area of operation ? (a) Cranes (b) Pallets (c) Industrial Trucks (d) Elevators
Ans: A
74. In ABC analysis, A-type inventory represents
(a) High value, High volume (b) High value, Low volume (c) Low value, Low volume (d) Low value, High volume
Ans: B
75. According to the definition of “week” under the Factory Act, 1948, it is a period of 7 days beginning at midnight on
(a) Sunday (b) Monday (c) Saturday (d) Friday
Ans: C
76. A rivet is specified by
(a) shank diameter (b) type of load (c) length of rivet (d) None of these
Ans: A
77. A steel bar of 5 m length is heated from 15 °C to 90 °C and is free to expand. The bar will induce
(a) Tensile stress (b) Shear stress (c) No stress (d) None of these
Ans: C
78. No. of inversions in a slider crank mechanism is
(a) 1 (b) 2 (c) 4 (d) 6
Ans: C
79. Elastic modulus of steel is
(a) 70 GPa (b) 210 GPa (c) 250 GPa (d) 300 GPa
Ans: B
80. For proper design of a shaft, it should be designed on the basis of
(a) Maximum principal stress theory (b) Maximum shear stress theory (c) Both (a) and (b) (d) Maximum strain theory
Ans: C
81. Rivets are made of following type of material :
(a) Brittle (b) Low density (c) Ductile (d) Low melting point
Ans: C
82. Which theory is best to estimate failure load for a ductile material ?
(a) Distortion energy theorem (b) Maximum strain energy theorem (c) Maximum shear stress theorem (d) None of these
Ans: C
83. What is the number of jaws in a self centred chuck of a lathe ?
(a) Eight (b) Five (c) Four (d) Three
Ans: D
84. Which one is not a part of cotter joint ?
(a) Socket (b) Spigot (c) Fork end (d) Collar
Ans: C
85. For transmitting power without slip, drive used is
(a) Rope drive (b) Belt drive (c) Cone drive (d) Chain drive
Ans: D
86. Nichrome is used in
(a) Gas turbine (b) Air craft engine (c) Heater element (d) Brake lining
Ans: C
87. In case of straight turning operation, length of work piece is 120 mm and feed rate is 0.25 mm/sec. How long will it take to complete the turning operation ?
(a) 8 minute (b) 10 minute (c) 12 minute (d) None of these
Ans: A
88. In leaf springs, the longest leaf is known as
(a) Lower leaf (b) Master leaf (c) Upper leaf (d) None of these
Ans: B
89. The rated life of a bearing varies
(a) Directly with load (b) Inversely as square of load (c) Inversely as cube of load (d) None of these
Ans: C
90. In design of flange coupling, the weakest element should be
(a) Key (b) Bolt (c) Flange (d) Shaft
Ans: A
91. A knuckle pin may fail in
(a) Shear (b) Bending (c) Crushing (d) All of these
Ans: D
92. A cotter joint is used to connect two rods which are in
(a) Tension only (b) Compression only (c) Tension and Compression (d) Shear only
Ans: C
93. Parallel fillet welded joints are designed for
(a) Tensile strength (b) Compressive strength (c) Bending strength (d) Shear strength
Ans: D
94. Initial cost of making a product is ` 1,00,000 and variable cost per unit is ` 40. If its selling price is ` 80 per unit, what would be the break even quantity ?
(a) 2500 units (b) 3500 units (c) 5000 units (d) 7000 units
Ans: A
95. What strength is to be considered for ductile material under cyclic load ?
(a) Ultimate strength (b) Yield strength (c) Endurance strength (d) Fracture strength
Ans: C
96. Which of the following is the an amorphous material ?
(a) Lead (b) Brass (c) Glass (d) Silver
Ans: C
97. Which of the following is a case hardening process ?
(a) Carburizing (b) Nitriding (c) Cynading (d) All of these
Ans: D
98. The chisel used for cutting steel sheets is usually
(a) Annealed (b) Normalised (c) Hardened (d) Hardened and Tempered
Ans: D
99. Addition of Nickel to Steel helps in improving
(a) Fatigue resistance (b) Creep resistance (c) Corrosion resistance (d) Cost reduction
Ans: A
100. The machinability of steel can be improved by alloying the steel with
(a) Copper (b) Chromium (c) Nickel (d) Sulphur
Ans: D
· UPSC Exam Syllabus- Mechanical Engineering
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