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381.

A Curtis turbine is

A.	A velocity compounded readtion turbine	B.	A pressure compounded reaction turbine
C.	A pure reaction turbine	D.	An impulse reaction turbine
E.	None of the above

382.

A low pressure accumulator is generally used with which of the following turbine

A.	Impulse turbine	B.	Reaction turbine
C.	Condensing turbine	D.	Back pressure turbine
E.	Mixed pressure turbine

383.

A steam turbine in which a part of the steam turbine after partial expansion is used for process heating and the remaining steam is further expanded for power generation, is known as

A.	50% reaction turbine	B.	Impulse turbine
C.	Back pressure turbine	D.	Pass out turbine
E.	Regenerative turbine

384.

The temperatures and pressures for boiler are given below. Which of these boilers can be classified as super-critical pressure boiler?

A.	250 psi, 150?C	B.	10 kg/cm2, 150?C
C.	100 kg/cm2, 450?C	D.	150 kg/cm2, 500?C
E.	218 kg/cm2, 540?C

385.

Which of the following will not be seen in a boiler using pulverised fuel?

A.	Feed pump	B.	Chimney
C.	Chain in great stoker	D.	Economiser
E.	Superheater

386.

If the boiler chimney emission consists of dense white smoke, then it can be concluded that

A.	Excess air has been supplied for combustion	B.	Insufficient air has been supplied for combustion
C.	Chemically correct air has been supplied for combustion	D.	Coal contains high percentage of ash
E.	Coal contains high percentage of sulphur

387.

The steam trap is used to

A.	Condense the steam	B.	Add moisture to steam
C.	Separate condensate from steam	D.	Superheat the steam
E.	Convert superheated steam into the steam

388.

The thermal efficiency of steam turbine can be increased by

A.	Increasing the pressure range	B.	Reheating
C.	Regeneration	D.	All of the above
E.	None of the above

389.

The value of reheat factor in case of steam turbines is usually

A.	0.9 to 0.99	B.	1.02 to 1.06
C.	1.10 to 1.16	D.	1.25 to 1.50
E.	1.75 to 2.50

390.

Which of the following is the internal loss of a turbine?

A.	Nozzle loss	B.	Blade friction loss
C.	Wheel friction loss	D.	All of above
E.	None of above