Machine Design MCQ Online Quiz - Set 01 - ObjectiveBooks

# Machine Design MCQ Online Quiz - Set 01

## Machine Design Online Quiz: Set 01

1. When a load W is suddenly applied to a bar of weight W₁, the stress induced in the bar will increase with the increase in weight W₁.
Correct
Incorrect

2. Screws jacks have multiple threads.
Agree
Disagree

3. According to law of gearing, the common normal at the point of contact between a pair of teeth must always pass through the pitch point.
Correct
Incorrect

4. The major diameter of a screw thread is also known as core or root diameter.
Yes
No

5. The radial stress across the thickness of a thick cylinder is maximum at the inner surface and zero at the outer surface.
True
False

6. The diameter of washer is generally taken bigger than the nut size.
True
False

7. Oldham coupling is used to transmit power between two parallel shafts which are slightly offset.
True
False

8. In a bolt, the plane of shear should be across the threaded portion of the shank.
Correct
Incorrect

9. The load placed at the top of the screw in a mechanical screw jack is prevented from rotation by providing a swiveling mechanism.
Correct
Incorrect

10. Two concentric helical springs used to provide greater spring force are wound is opposite direction.
True
False

11. A quarter turn belt drive is used when the shafts are arranged at right angles and rotate in one definite direction.
Yes
No

12. When the frictional force helps to apply the brake, then the brake is said to be self-energizing brake.
Correct
Incorrect

13. The ratio of number of teeth to the pitch circle diameter in millimetres is called circular pitch.
Agree
Disagree

14. The springs mostly used in machinery have spring index less than 3
Correct
Incorrect

15. A plate with a circular hole in the centre is subjected to a pull of P. The maximum stress induced at the edge of the hole is three times of the nominal stress.
Correct
Incorrect

16. When percentage of carbon in steel is increased, the ductility of steel decreases.
Correct
Incorrect

17. In a belt drive, the velocity ratio is the inverse ratio of the diameters of driving and driven pulleys.
True
False

18. When the top of a tooth undercuts the root on the mating gear, it is known as interference.
Yes
No

19. The buttress threads have low frictional resistance characteristic of the square threads and have the same strength of V-threads.
Yes
No

20. A bushed pin flexible coupling is used to connect two shafts whose axes intersect at a small angle.
Yes
No

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