Fugacity and pressure are numerically equal, when the gas is

Question: Blow off cock is provided in steam boiler to
[A].

guard the boiler in case of abnormal rise in steam pressure.

[B].

drain out water and sludge during its repair.

[C].

regulate the supply of water in boiler.

[D].

put out the fire in the furnace when the water level in the boiler falls to unsafe limit.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher
[A].

ductility

[B].

impact strength

[C].

machinability

[D].

melting point

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
[A].

23

[B].

23/2

[C].

25/2

[D].

21/3

Answer: Option B

Explanation:

No answer description available for this question.