1. What is the ratio of key way taper ?

1:20

1:50

1:100

1:120

Answer: 1:100

Explanation:


2. The thickness of hexagonal lock nut may be the range of _______. (D=diameter of the bolts) ?

0.2d to 0.3d

0.6d to 0.8d

1.6d to 1.8d

3.6d to 4.8d

Answer: 0.6d to 0.8d

Explanation:


3. Which type of joint is easily unlockable ?

welded joint

mechanical joint

riveted joint

threaded joint

Answer: threaded joint

Explanation:


4. The following semicircular key is used for transmission light torque ?

woodruff key

saddle key

normal key

circular key

Answer: woodruff key

Explanation:


5. Which bolt fit in rectangular slot ?

square bolt

hexagonal bolt

t-bolt

hook bolt

Answer: t-bolt

Explanation:


6. A tab washer is used for ?

self locking

locking the nuts

avoiding vibration

fastening fabrication work

Answer: locking the nuts

Explanation:


7. The upper portion of a hexagonal nut is chamfered at an angle of ?

75°

60°

45°

35°

Answer: 35°

Explanation: