Civil Engineering - Applied Mechanics

16. 

The rate of change of displacement of a body with respect to its surrounding, is known

A. velocity
B. acceleration
C. speed
D. none of these.

Answer: Option C

Explanation:

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17. 

The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of

A.
B.
C.
D.
E. R/2.

Answer: Option B

Explanation:

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18. 

The Centre of gravity of a 10 x 15 x 5 cm T section from its bottom, is

A. 7.5 cm
B. 5.0 cm
C. 8.75 cm
D. 7.85 cm
E. none of above.

Answer: Option C

Explanation:

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19. 

For a self-locking machine, the efficiency should be

A. less than 60%
B. 50%
C. more than 50%
D. None of these.

Answer: Option A

Explanation:

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20. 

When a body moves round a fixed axis, it has

A. a rotary motion
B. a circular motion
C. a translatory
D. a rotary motion and translatory motion.

Answer: Option B

Explanation:

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