A:-(i) is correct and (ii) is wrong
B:-(i) and (ii) are wrong

C:-(i) and (ii) are correct

D:-(i) is wrong and (ii) is correct
Correct Answer:- Option-C

Question23:-By fitting air vessel to the reciprocating pump
i. Discharge of the water can be made uniform.
ii. Pump can be run at high speed.
111. Work done in overcoming the frictional resistance in the suction and delivery
pipes can be
reduced.

A:-(i) and (ii) are correct and (iii) is wrong
B:-(i), (ii) and (iii) are correct

C:-(i) and (ii) are wrong and (iii) is correct
D:-(i) is correct and (ii) and (iii) are wrong
Correct Answer:- Option-B

Question24:-In a centrifugal pump ratio of impeller power to the prime mover
power is

A:-Manometric efficiency
B:-Mechanical efficiency
C:-Overall efficiency
D:-None of these

Correct Answer:- Option-B

Question25:-In a belt transmission when the centrifugal tension is taken into
account

A:-Total tension in the tight side will increase

B:-Total tension in the slack side will decrease

C:-Both 1 and 2 are correct

D:-1 is correct 2 is wrong

Correct Answer:- Option-D
Question26:-Instead of natural clay silica grains are coated with sodium silicate in

A:-Shell sand

B:-co, sand

C:-Facing sand

D:-Loam sand

Correct Answer:- Option-B

Question27:-In a mould to trap heavier and lighter impurities flowing towards the
casting provide