Chemical Engineering - Chemical Engineering Basics

11.
Multistage compression is necessary for high efficiency,
if the ratio of the delivery pressure to the intake pressure exceeds 5:1.
when large amount of gas is to be compressed.
when the delivered gas is desired at very high velocity.
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

12.
__________ can not increase the fatigue strength of a material.
Grain refining
Grain coarsening
Surface hardening
Shot peening
Answer: Option
Explanation:
No answer description is available. Let's discuss.

13.
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
23
23/2
25/2
21/3
Answer: Option
Explanation:
No answer description is available. Let's discuss.

14.
Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and
manganese
silicon
nickel
chromium
Answer: Option
Explanation:
No answer description is available. Let's discuss.

15.
Electrometallurgy is not involved in the extraction of __________ from its ore.
aluminium
tin
lead
both(b) & (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.