MECHANICAL ENGINEERING- PAGE 23
Mechanical Engineering MCQs- Page 23
1. Ninu took two rounds of a ground 180 cm long and 100 m wide. The total distance covered by him is:
(A) 280 m (B) 560 m (C) 1120 m (D) 2240 m
Ans: C
2. Find the side of a square whose perimeter is 324 cm: (A) 18 cm (B) 81 cm (C) 24 cm (D) 3.24 cm
Ans: B
3. The amount of region enclosed by a plane closed figure is called: (A) Area (B) Perimeter (C) Circumference (D) Semi perimeter
Ans: A
4. The area of a square field is 24200 sq.m. How long will a man take to cross the field, diagonally at the rate of 6.6 km/hr: (A) 3 minutes (B) 2 minutes (C) 2.4 minutes (D) 2 min 40 seconds
Ans: B
5. A 5 cm cube is cut in to as many 1 cm cubes as possible. What is the ratio of the surface area of the larger cube to that of the sum of the surface areas of the smaller cube (A) 1 : 6 (B) 1 : 5 (C) 1 : 25 (D) 1 : 125
Ans: B
6.An octagon has –––––––––––––sides. (A) 7 (B) 8 (C) 4 (D) 5
Ans: B
7. One kilo gram mass is equivalent as ––––––––––––– N. (A) 1.5 (B) 9.81 (C) 8.32 (D) 6.12
Ans: B
8. F=mx is derived from: (A) Newton’s first law (B) Newton’s second law (C) Newton’s third law (D) Newton’s law of gravitation
Ans: B
9. The body which does not deform when subjected to external forces is termed as: (A) flexible body (B) composit training (C) elastic body (D) rigid body
Ans: D
10. Geometric center of the area where the entire area can be assumed to be concentrated is known as: (A) centroid of area (B) midpoint of area (C) eccentricity of area (D) concentricity of area
Ans: A
11. Whenever a body moves or tends to move over another body ––––––––––––– force is developed at the contact surface. (A) laminar (B) co-planar (C) anti frictional (D) frictional
Ans: D
12. The angle between normal reaction at the contact surface and the resultant of normal reaction and limiting friction is: (A) angle of friction (B) angle of reaction (C) angle of repose (D) angle of deviation
Ans: A
13. The internal angle of a regular hexagon is ––––––––––––– degree : (A) 72 (B) 108 (C) 120 (D) 150
Ans: C
14. A point ‘p’ is above horizontal plane and in front of vertical plane. The point is in : (A) First quadrant (B) Second quadrant (C) Third quadrant (D) Fourth quadrant
Ans: A
15. Orthographic projection is also known as : (A) Single view projection (B) Two view projection (C) Multi view projection (D) All the above
Ans: C
16. How many pairs of parallel lines are there in regular hexagon : (A) 2 (B) 3 (C) 6 (D) 1
Ans: B
17. When drawing a perpendicular line through apoint which is nearer to the middle of a given line is cut at two points on the line? (A) A circle (B) A square (C) A rectangle (D) An arc
Ans: D
18. The line perpendicular to a tangent and is passing through the point of contact is called : (A) Perpendicular bisector (B) Angle bisector (C) Normal (D) Tangent
Ans: C
19. The preferred size of the drawing sheet is recommended by the : (A) BIS (B) ASME (C) ASTE (D) NIST
Ans: A
20. The perimeter of a triangle of side 10 cm, 5 cm and 6 cm is: (A) 21 cm (B) 3 cm (C) 20 cm (D) 90 cm
Ans: A
21. Standard size of the part, which is same for both hole and its shaft is known as: (A) Enlarged size (B) reduced size (C) Nominal size (D) Measured size
Ans: C
22. Difference between maximum and minimum limit of size is: (A) allowance (B) tolerance (C) limits of size (D) actual deviation
Ans: B
23. Trimmed size of A1 drawing sheet will be:
(A) 147 mm x 210 mm (B) 210 mm x 297 mm (C) 420 mm x 594 mm (D) 594 mm x 841 mm
Ans: D
24. The drawing which is used for explaining working principle of any machine is known as (A) production drawing (B) exploded drawing (C) schematic drawing (D) tabular drawing
Ans: C
25. Length of the arrow head should be about ––––––––––––– times its maximum width. (A) three (B) two (C) four (D) five
Ans: A
26. A section is formed by passing a cutting plane at right angles to the axis of the object is termed as: (A) partial section (B) full section (C) revolved section (D) offset section
Ans: C
27. Actual depth of a British Association thread in terms of pitch is: (A) d = p (B) d = 0.6 p (C) d = 0.01 p (D) d = 0.001 p
Ans: B
28. Width across flats (W) of a hexagonal nut can be found by ––––––––––––– formula.
(A) 2 D + 1 mm (B) D + 3 mm
(C) 3 D + 3 mm (D) 1.5 D + 3 mm
Ans: D
29. The length width in case of an arrow head is : (A) 1 : 1 (B) 2 : 1 (C) 3 : 1 (D) 4 : 1
Ans: C
30. The bearing pressure is perpendicular to the axis of shaft in ––––––––––––– bearings. (A) journal (B) pivot (C) thrust (D) collar
Ans: A
31. Thread angle of Acme thread is: (A) 55° (B) 29° (C) 35° (D) 45°
Ans: B
32. Standard taper of taper key is: (A) 1 in 50 (B) 1 in 40 (C) 1 in 100 (D) 1 in 30
Ans: C
33. In a muff coupling, the outside diameter and the length of the muff are ––––––––––––– and ––––––––––––– the diameter of the shaft. (A) two times and two times (B) three times and two times (C) three times and three times (D) two times and three times
Ans: D
34. If width of a ‘V’ belt is 10 mm then the length of the belt will be in a range of ––––––––––––– mm. (A) 150 to 860 mm (B) 260 to 860 mm (C) 212 to 1262 mm (D) 420 to 2820 mm
Ans: D
35. The formula for finding out circular pitch of a spur gear is: (A) π x module pitch (B) π / module pitch (C) π x number of teeth (D) π /number of teeth
Ans: A
36. The engine produces power by the: (A) Rotation of the crankshaft (B) Valve action (C) Combustion pressure pushing on piston (D) Up and down movement of piston
Ans: C
37. A Telescopic gauge can be used to measure a cylinder bore if ––––––––––––– is used to the telescopic gauge? (A) Micrometer (B) Feeler gauge (C) Straight edge (D) Dial indicator
Ans: A
38. The depth of water formed by providing a tap in the water closet is called: (A) Water cussion (B) Water seal (C) Water meter (D) Water barrier
Ans: B
39. ––––––––––––– bacteria can live and develop in the presence or absence of oxygen. (A) Aerobic (B) Anaerobic (C) Facultative (D) All of the above
Ans: C
40. The waste water from the kitchen, bathroom etc is called: (A) Sewage (B) Ashes (C) Garbage (D) Sullage
Ans: D
41. The capillary rise is due to: (A) Cohesion (B) Adhesion (C) Both of the above (D) None of the above
Ans: C
42. The law related to transmission of pressure is: (A) Faraday’s law (B) Pascal’s law (C) Stevin’s law (D) None of the above
Ans: B
43. A bearing shell has a slightly larger arc than bearing housing is called: (A) Bearing tang (B) Bearing saddle (C) Bearing crush (D) Bearing spread
Ans: D
44. In a normally operating engine, intake and exhaust valves are opened by a cam closed by the: (A) Rocker arm or cam follower (B) Lifters or tappets (C) Valve spring (D) Valve guide or pushrod
Ans: C
45. The distributor injection pump has: (A) A rotor that sends fuel to the injector (B) A barrel and plunger assembly for each cylinder (C) A helix cut in each plunger (D) All of the above
Ans: A
46. Which of the following engine do not have mechanical balance? (A) Inline engine (B) Single cylinder engine (C) 'V' engine (D) Radial engine
Ans: B
47. How many, crankshaft rotations required to get one power stroke in a four stroke single cylinder diesel engine? (A) One (B) Three (C) Two (D) Four
Ans: C
48. The centre of pressure on any surface immersed in a liquid is the point through which the ––––––––––––– acts? (A) Resultant pressure (B) Weight of surface (C) Buoyant force (D) Total pressure
Ans: D
49. The bottom edge of the notch over which the liquid flows is called? (A) Bed (B) Sill (C) Sluice (D) Vent
Ans: B
50. A Sewage contains: (A) 0.1% matters (B) 99.9% water (C) Both of the above are correct (D) None of the above
Ans: C
(A) 280 m (B) 560 m (C) 1120 m (D) 2240 m
Ans: C
2. Find the side of a square whose perimeter is 324 cm: (A) 18 cm (B) 81 cm (C) 24 cm (D) 3.24 cm
Ans: B
3. The amount of region enclosed by a plane closed figure is called: (A) Area (B) Perimeter (C) Circumference (D) Semi perimeter
Ans: A
4. The area of a square field is 24200 sq.m. How long will a man take to cross the field, diagonally at the rate of 6.6 km/hr: (A) 3 minutes (B) 2 minutes (C) 2.4 minutes (D) 2 min 40 seconds
Ans: B
5. A 5 cm cube is cut in to as many 1 cm cubes as possible. What is the ratio of the surface area of the larger cube to that of the sum of the surface areas of the smaller cube (A) 1 : 6 (B) 1 : 5 (C) 1 : 25 (D) 1 : 125
Ans: B
6.An octagon has –––––––––––––sides. (A) 7 (B) 8 (C) 4 (D) 5
Ans: B
7. One kilo gram mass is equivalent as ––––––––––––– N. (A) 1.5 (B) 9.81 (C) 8.32 (D) 6.12
Ans: B
8. F=mx is derived from: (A) Newton’s first law (B) Newton’s second law (C) Newton’s third law (D) Newton’s law of gravitation
Ans: B
9. The body which does not deform when subjected to external forces is termed as: (A) flexible body (B) composit training (C) elastic body (D) rigid body
Ans: D
10. Geometric center of the area where the entire area can be assumed to be concentrated is known as: (A) centroid of area (B) midpoint of area (C) eccentricity of area (D) concentricity of area
Ans: A
11. Whenever a body moves or tends to move over another body ––––––––––––– force is developed at the contact surface. (A) laminar (B) co-planar (C) anti frictional (D) frictional
Ans: D
12. The angle between normal reaction at the contact surface and the resultant of normal reaction and limiting friction is: (A) angle of friction (B) angle of reaction (C) angle of repose (D) angle of deviation
Ans: A
13. The internal angle of a regular hexagon is ––––––––––––– degree : (A) 72 (B) 108 (C) 120 (D) 150
Ans: C
14. A point ‘p’ is above horizontal plane and in front of vertical plane. The point is in : (A) First quadrant (B) Second quadrant (C) Third quadrant (D) Fourth quadrant
Ans: A
15. Orthographic projection is also known as : (A) Single view projection (B) Two view projection (C) Multi view projection (D) All the above
Ans: C
16. How many pairs of parallel lines are there in regular hexagon : (A) 2 (B) 3 (C) 6 (D) 1
Ans: B
17. When drawing a perpendicular line through apoint which is nearer to the middle of a given line is cut at two points on the line? (A) A circle (B) A square (C) A rectangle (D) An arc
Ans: D
18. The line perpendicular to a tangent and is passing through the point of contact is called : (A) Perpendicular bisector (B) Angle bisector (C) Normal (D) Tangent
Ans: C
19. The preferred size of the drawing sheet is recommended by the : (A) BIS (B) ASME (C) ASTE (D) NIST
Ans: A
20. The perimeter of a triangle of side 10 cm, 5 cm and 6 cm is: (A) 21 cm (B) 3 cm (C) 20 cm (D) 90 cm
Ans: A
21. Standard size of the part, which is same for both hole and its shaft is known as: (A) Enlarged size (B) reduced size (C) Nominal size (D) Measured size
Ans: C
22. Difference between maximum and minimum limit of size is: (A) allowance (B) tolerance (C) limits of size (D) actual deviation
Ans: B
23. Trimmed size of A1 drawing sheet will be:
(A) 147 mm x 210 mm (B) 210 mm x 297 mm (C) 420 mm x 594 mm (D) 594 mm x 841 mm
Ans: D
24. The drawing which is used for explaining working principle of any machine is known as (A) production drawing (B) exploded drawing (C) schematic drawing (D) tabular drawing
Ans: C
25. Length of the arrow head should be about ––––––––––––– times its maximum width. (A) three (B) two (C) four (D) five
Ans: A
26. A section is formed by passing a cutting plane at right angles to the axis of the object is termed as: (A) partial section (B) full section (C) revolved section (D) offset section
Ans: C
27. Actual depth of a British Association thread in terms of pitch is: (A) d = p (B) d = 0.6 p (C) d = 0.01 p (D) d = 0.001 p
Ans: B
28. Width across flats (W) of a hexagonal nut can be found by ––––––––––––– formula.
(A) 2 D + 1 mm (B) D + 3 mm
(C) 3 D + 3 mm (D) 1.5 D + 3 mm
Ans: D
29. The length width in case of an arrow head is : (A) 1 : 1 (B) 2 : 1 (C) 3 : 1 (D) 4 : 1
Ans: C
30. The bearing pressure is perpendicular to the axis of shaft in ––––––––––––– bearings. (A) journal (B) pivot (C) thrust (D) collar
Ans: A
31. Thread angle of Acme thread is: (A) 55° (B) 29° (C) 35° (D) 45°
Ans: B
32. Standard taper of taper key is: (A) 1 in 50 (B) 1 in 40 (C) 1 in 100 (D) 1 in 30
Ans: C
33. In a muff coupling, the outside diameter and the length of the muff are ––––––––––––– and ––––––––––––– the diameter of the shaft. (A) two times and two times (B) three times and two times (C) three times and three times (D) two times and three times
Ans: D
34. If width of a ‘V’ belt is 10 mm then the length of the belt will be in a range of ––––––––––––– mm. (A) 150 to 860 mm (B) 260 to 860 mm (C) 212 to 1262 mm (D) 420 to 2820 mm
Ans: D
35. The formula for finding out circular pitch of a spur gear is: (A) π x module pitch (B) π / module pitch (C) π x number of teeth (D) π /number of teeth
Ans: A
36. The engine produces power by the: (A) Rotation of the crankshaft (B) Valve action (C) Combustion pressure pushing on piston (D) Up and down movement of piston
Ans: C
37. A Telescopic gauge can be used to measure a cylinder bore if ––––––––––––– is used to the telescopic gauge? (A) Micrometer (B) Feeler gauge (C) Straight edge (D) Dial indicator
Ans: A
38. The depth of water formed by providing a tap in the water closet is called: (A) Water cussion (B) Water seal (C) Water meter (D) Water barrier
Ans: B
39. ––––––––––––– bacteria can live and develop in the presence or absence of oxygen. (A) Aerobic (B) Anaerobic (C) Facultative (D) All of the above
Ans: C
40. The waste water from the kitchen, bathroom etc is called: (A) Sewage (B) Ashes (C) Garbage (D) Sullage
Ans: D
41. The capillary rise is due to: (A) Cohesion (B) Adhesion (C) Both of the above (D) None of the above
Ans: C
42. The law related to transmission of pressure is: (A) Faraday’s law (B) Pascal’s law (C) Stevin’s law (D) None of the above
Ans: B
43. A bearing shell has a slightly larger arc than bearing housing is called: (A) Bearing tang (B) Bearing saddle (C) Bearing crush (D) Bearing spread
Ans: D
44. In a normally operating engine, intake and exhaust valves are opened by a cam closed by the: (A) Rocker arm or cam follower (B) Lifters or tappets (C) Valve spring (D) Valve guide or pushrod
Ans: C
45. The distributor injection pump has: (A) A rotor that sends fuel to the injector (B) A barrel and plunger assembly for each cylinder (C) A helix cut in each plunger (D) All of the above
Ans: A
46. Which of the following engine do not have mechanical balance? (A) Inline engine (B) Single cylinder engine (C) 'V' engine (D) Radial engine
Ans: B
47. How many, crankshaft rotations required to get one power stroke in a four stroke single cylinder diesel engine? (A) One (B) Three (C) Two (D) Four
Ans: C
48. The centre of pressure on any surface immersed in a liquid is the point through which the ––––––––––––– acts? (A) Resultant pressure (B) Weight of surface (C) Buoyant force (D) Total pressure
Ans: D
49. The bottom edge of the notch over which the liquid flows is called? (A) Bed (B) Sill (C) Sluice (D) Vent
Ans: B
50. A Sewage contains: (A) 0.1% matters (B) 99.9% water (C) Both of the above are correct (D) None of the above
Ans: C
51. The openings constructed on lines of sewers or drains in order to enable men enter or leave them is called: (A) Pot hole (B) Lamp hole (C) Street inlet (D) Man holes
Ans: D
52. What is the volume of the space above the piston at BDC? (A) Swept volume (B) Combustion chamber volume (C) Total volume (D) Clearance volume
Ans: C
53. What effect does backpressure have on the operation of an IC engine? (A) Reduces power (B) Increases fuel economy (C) Increases the amount of CO (D) All of the above
Ans: A
54. Percentage of fuel energy lost to the cylinder walls is approximately: (A) 15% (B) 30% (C) 5% (D) 80%
Ans: B
55. Firing order of a 6- cylinder in line engine is: (A) 1-6-3-5-2-4 (B) 1-3-6-2-4-5 (C) 1-4-3-2-6-5 (D) 1-5-3-6-2-4
Ans: D
56. A plane is held parallel to horizontal plane in which view we can watch drawing on that plane : (A) Top view (B) Front view (C) Back view (D) Side view
Ans: A
57. A circle is placed at 20 degrees with vertical the view from top view will be : (A) Line (B) Circle (C) Ellipse (D) Oval
Ans: C
58. Which of the following represents reducing scales (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 10 : 1
Ans: B
59. In first angle projection method object is assumed to be placed in (A) First quadrant (B) Second quadrant (C) Third quadrant (D) Fourth quadrant
Ans: A
60. The dotted line represents : (A) Hidden edge (B) Projection line (C) Entre line (D) Hatching line
Ans: A
61. The property of liquid used in the manufacturing of lead shots is : (A) Viscosity (B) Capillarity (C) Surface tension (D) Density
Ans: C
62. Barometer is used to measure : (A) Atmospheric pressure (B) Vacuum pressure (C) Absolute pressure (D) Gauge pressure
Ans: A
63. The equation of continuity in brief states that the ––––––––––––– of the fluid through a section remains the same : (A) Velocity (B) Mass (C) Direction (D) Total head
Ans: B
64. Thrust bearing wear will cause excessive : (A) Crankshaft bending (B) Crankshaft vibration (C) Crankshaft endplay (D) Crankshaft speed
Ans: C
65. A venturimeter is used to measure : (A) Pressure in a pipe (B) Total energy in a pipeline (C) Velocity of flow in a pipeline (D) Discharge through a pipe
Ans: D
66. The heading up of water due to an obstruction in its flow is called : (A) Afflux (B) Hydraulic jump (C) Backwater (D) None of the above
Ans: A
67. Detonation results from : (A) High idle speed during cold starts (B) Over advanced ignition timing (C) High-octane fuel (D) Lowering the compression ratio
Ans: B
68. Hydraulic radius is the ratio between wetted area to : (A) Wetted perimeter (B) Wetted bed width (C) Wetted side length (D) Any of the above
Ans: A
69. The scale of a drawing is given as 1:20 what is the representative fraction : (A) 20 (B) 1/20 (C) 0.5 (D) 0.02
Ans: B
70. How many external tangents are there for two circles : (A) 1 (B) 2 (C) 3 (D) 4
Ans: B
71. The sections cut by a plane on a right circular cone are called : (A) Parabola sections (B) Conic sections (C) Elliptical sections (D) Hyperbolic sections
Ans: B
72. Which of the following is conic section : (A) Circle (B) Rectangle (C) Triangle (D) Square
Ans: A
73. Generally in 4 stroke diesel engine the inlet valve opens : (A) 25 degree before TDC (B) 20 degree before TDC (C) 40 degree before TDC (D) 10 degree before TDC
Ans: D
74. The three basic pollutants the emission system control (A) HC, H2O and NO (B) CO2, NO and HC (C) HC, CO and NO (D) CO2, H2O and HC
Ans: C
75. Which is the most common tool used for drawing circles : (A) French Curve (B) Mini Drafter (C) Divider (D) Compass
Ans: D
76. Drawing pencils are graded according to increase in relative : (A) Diameter (B) Sharpness (C) Length (D) Hardness
Ans: D
77. In unidirectional system the dimensions are : (A) Placed above the dimension line (B) Placed below the dimension line (C) Placed by breaking the dimension line in the middle (D) None of the above
Ans: C
Ans: D
52. What is the volume of the space above the piston at BDC? (A) Swept volume (B) Combustion chamber volume (C) Total volume (D) Clearance volume
Ans: C
53. What effect does backpressure have on the operation of an IC engine? (A) Reduces power (B) Increases fuel economy (C) Increases the amount of CO (D) All of the above
Ans: A
54. Percentage of fuel energy lost to the cylinder walls is approximately: (A) 15% (B) 30% (C) 5% (D) 80%
Ans: B
55. Firing order of a 6- cylinder in line engine is: (A) 1-6-3-5-2-4 (B) 1-3-6-2-4-5 (C) 1-4-3-2-6-5 (D) 1-5-3-6-2-4
Ans: D
56. A plane is held parallel to horizontal plane in which view we can watch drawing on that plane : (A) Top view (B) Front view (C) Back view (D) Side view
Ans: A
57. A circle is placed at 20 degrees with vertical the view from top view will be : (A) Line (B) Circle (C) Ellipse (D) Oval
Ans: C
58. Which of the following represents reducing scales (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 10 : 1
Ans: B
59. In first angle projection method object is assumed to be placed in (A) First quadrant (B) Second quadrant (C) Third quadrant (D) Fourth quadrant
Ans: A
60. The dotted line represents : (A) Hidden edge (B) Projection line (C) Entre line (D) Hatching line
Ans: A
61. The property of liquid used in the manufacturing of lead shots is : (A) Viscosity (B) Capillarity (C) Surface tension (D) Density
Ans: C
62. Barometer is used to measure : (A) Atmospheric pressure (B) Vacuum pressure (C) Absolute pressure (D) Gauge pressure
Ans: A
63. The equation of continuity in brief states that the ––––––––––––– of the fluid through a section remains the same : (A) Velocity (B) Mass (C) Direction (D) Total head
Ans: B
64. Thrust bearing wear will cause excessive : (A) Crankshaft bending (B) Crankshaft vibration (C) Crankshaft endplay (D) Crankshaft speed
Ans: C
65. A venturimeter is used to measure : (A) Pressure in a pipe (B) Total energy in a pipeline (C) Velocity of flow in a pipeline (D) Discharge through a pipe
Ans: D
66. The heading up of water due to an obstruction in its flow is called : (A) Afflux (B) Hydraulic jump (C) Backwater (D) None of the above
Ans: A
67. Detonation results from : (A) High idle speed during cold starts (B) Over advanced ignition timing (C) High-octane fuel (D) Lowering the compression ratio
Ans: B
68. Hydraulic radius is the ratio between wetted area to : (A) Wetted perimeter (B) Wetted bed width (C) Wetted side length (D) Any of the above
Ans: A
69. The scale of a drawing is given as 1:20 what is the representative fraction : (A) 20 (B) 1/20 (C) 0.5 (D) 0.02
Ans: B
70. How many external tangents are there for two circles : (A) 1 (B) 2 (C) 3 (D) 4
Ans: B
71. The sections cut by a plane on a right circular cone are called : (A) Parabola sections (B) Conic sections (C) Elliptical sections (D) Hyperbolic sections
Ans: B
72. Which of the following is conic section : (A) Circle (B) Rectangle (C) Triangle (D) Square
Ans: A
73. Generally in 4 stroke diesel engine the inlet valve opens : (A) 25 degree before TDC (B) 20 degree before TDC (C) 40 degree before TDC (D) 10 degree before TDC
Ans: D
74. The three basic pollutants the emission system control (A) HC, H2O and NO (B) CO2, NO and HC (C) HC, CO and NO (D) CO2, H2O and HC
Ans: C
75. Which is the most common tool used for drawing circles : (A) French Curve (B) Mini Drafter (C) Divider (D) Compass
Ans: D
76. Drawing pencils are graded according to increase in relative : (A) Diameter (B) Sharpness (C) Length (D) Hardness
Ans: D
77. In unidirectional system the dimensions are : (A) Placed above the dimension line (B) Placed below the dimension line (C) Placed by breaking the dimension line in the middle (D) None of the above
Ans: C
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