Engineering :: Turbo machines

@ : Home > Mechanical Engineering > Turbo machines

11.

Which component of a gas turbine consumes maximum power?

A.	Starter	B.	Regenerator
C.	Compressor	D.	Combustion chamber

12.

In which of the following plant inferior quality fuel can be used?

A.	Open cycle gas turbine with regeneration	B.	Open cycle gas turbine with intercooling
C.	Open cycle gas turbine with reheating and regeneration	D.	Closed cycle gas turbine

13.

In a reheating gas turbine cycle, reheating is done

A.	by gases from turbine exhaust	B.	by gases from intercooler
C.	in separate combustion chamber	D.	any of the above

14.

In a gas turbine combined cycle plant, a waste heat boiler is used to

A.	heat air from intercooler	B.	gases from regenerator
C.	recover heat form exhaust gases	D.	none of the above

15.

A control volume has an inlet area of 0.1 m2 and exit area of 0.05 m2. The density is 3.89 kg/m2 and constant. If the inlet velocity is 30 m/s, the force on the control volume will be

A.	50 N	B.	150 N
C.	250 N	D.	350 N

16.

Under standard atmospheric condition, the velocity of air is

A.	236 m/s	B.	336 m/s
C.	436 m/s	D.	536 m/s

17.

The ratio of actual velocity to the local velocity of sound is called

A.	Velicity ratio	B.	Velocity factor
C.	Speed ratio	D.	Mach number

18.

In a nozzle, once the critical conditions are achieved at the throat, than which of the following remains constant:

A.	Density of fluid	B.	Velocity of fluid
C.	Flow rate	D.	All of the above

19.

In a nozzle under choked flow conditions pressure waves travel, in the divergent portion, at

A.	subsonic speed	B.	sonic speed
C.	supersonic speed	D.	subsonic to supersonic speed

20.

In a nozzle if back pressure is equal to inlet pressure

A.	no flow occurs	B.	maximum flow occurs
C.	flow is subsonic in diverging section	D.	flow is supersonic in converging as well as supersonic sections