Practice Test: Question Set - 33
1. In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as
- (A) Helix angle
- (B) Pressure angle
- (C) Pitch lead angle
- (D) None of these
2. The yield point in static loading is __________ as compared to fatigue loading.
- (A) Higher
- (B) Lower
- (C) Same
- (D) None of these
3. The resilience of a bolt may be increased by
- (A) Increasing its shank diameter
- (B) Increasing its length
- (C) Decreasing its shank diameter
- (D) Decreasing its length
4. The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to
- (A) 0.75/(0.75 +√v)
- (B) 3/(3 +v)
- (C) 4.5/(4.5 +v)
- (D) 6/(6 +v)
5. The bearings of medium series have capacity __________ over the light series.
- (A) 10 to 20%
- (B) 20 to 30%
- (C) 30 to 40%
- (D) 40 to 50%
6. The square threads are usually found on
- (A) Spindles of bench vices
- (B) Railway carriage couplings
- (C) Feed mechanism of machine tools
- (D) Screw cutting lathes
7. Multiple threads are used to secure
- (A) Low efficiency
- (B) High efficiency
- (C) High load lifting capacity
- (D) High mechanical advantage
8. Which of the following statement is correct?
- (A) The cold rolled shafting is stronger than hot rolled shafting
- (B) The hot rolled shafting is stronger than cold rolled shafting
- (C) The cold rolled and hot rolled shafting are equally strong
- (D) The shafts are not made by rolling process
9. The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
- (A) Increases
- (B) Decreases
- (C) Remain same
- (D) None of these
10. The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is
- (A) 7.5 kN
- (B) 10.6 kN
- (C) 15 kN
- (D) 22.5 kN
11. The smallest diameter of an external or internal screw thread is known as
- (A) Minor diameter
- (B) Major diameter
- (C) Pitch diameter
- (D) None of these
12. The shock absorbing capacity of a bolt may be increased by
- (A) Increasing its shank diameter
- (B) Decreasing its shank diameter
- (C) Tightening the bolt properly
- (D) Making the shank diameter equal to core diameter of thread
13. The piston pin bearings in heavy duty diesel engines are
- (A) Needle roller bearings
- (B) Tapered roller bearings
- (C) Spherical roller bearings
- (D) Cylindrical roller bearings
14. The tension on the slack side of the belt is __________ the tension on the tight side of the belt.
- (A) Equal to
- (B) Less than
- (C) Greater than
- (D) None of these
15. In skew bevel gearing, the axes of shafts are
- (A) Intersecting and the teeth are curved
- (B) Non-intersecting and nonparallel and the teeth are curved
- (C) Non-intersecting and non-parallel and the teeth are straight
- (D) None of the above