ISRO Technical Assistant Mechanical Question Paper - 2015 with Answer Key

ISRO Technical Assistant Mechanical Question Paper - 2015 with Answer Key

1) For maximum efficiency in multi-stage compressor

Answer is:

All of the above

Explanation:

.

2) For a two stage reciprocating air compressor, for minimum work required the intercooler pressure is given by

Answer is:

P2=sqtr(p1xp3)

3) Ideal air standard efficiency of a closed cycle gas turbine depends on

Answer is:

pressure ratio of the cycle only

4) The plant which is smaller in size and lower in weight for the same power, is

Answer is:

Gas turbine plant

5) At the critical pressure ratio for a convergent nozzle, the velocity at outlet will be

Answer is:

More than sonic velocity