Practice Test: Question Set - 03
1. While designing a shaft, key and hub, care is taken so that
- (A) Shaft
is the weakest component
- (B) Key
is the strongest component
- (C) Key
is the weakest component
- (D) The
hub is the weakest component
2. The maximum shear stress induced in a transmission shaft, subjected to bending stress (σb) and torsional shear stress (τ), is given by,
- (A) √[(σb/2)2 + Ï„2]
- (B) √[σb2+ Ï„2]
- (C) σb/2 + ½ √[(σb/2)2 + Ï„2]
- (D) None
of above
3. The function of key is
- (A) To
connect transmission shaft to a rotating machine elements like gears
- (B) To
transmit torque from shaft to hub and vice versa
- (C) To
prevent relative rotational motion between the shaft and the connected element
- (D) All
of above three functions
4. A flange coupling is used
- (A) For
intersecting shafts
- (B) For
collinear shafts
- (C) For
small shafts rotating at slow speeds
- (D) For
parallel shafts
5. The standard taper for sunk key is
- (A) 1 in 100
- (B) 1 in 50
- (C) 1 in 10
- (D) 1 in 1000
6. The standard width for square or flat key in terms of shaft diameter (D) is,
- (A) d
- (B) d/2
- (C) d/4
- (D) d/8
7. In case of saddle key
- (A) The keyway
is cut in the shaft only
- (B) The keyway
is cut in the hub only
- (C) The keyway
is cut in both the shaft and the hub
- (D) None of the
above
8. Which is the correct statement?
- (A) Cold
rolling produces stronger shafts than hot rolling
- (B) Hot
rolling produces stronger shafts than cold rolling
- (C) Cold
rolling and hot rolling produces equally strong shafts
- (D) Strength
of shaft is independent of rolling processes
9. The key, which consists of two square keys, is called,
- (A) Saddle key
- (B) Feather key
- (C) Woodruff key
- (D) Kennedy key
10. A muff coupling is
- (A) Rigid
coupling
- (B) Flexible
coupling
- (C) Shock
absorbing coupling
- (D) None
of the above
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