Practice Power Plant Engineering In EE Multiple Choice Questions Quiz-1 - MCQGeeks.com

Q.1

The modern steam turbines are

impulse turbines
reaction turbines
impulse-reaction turbines
none of the above

Q.2

The efficiency of a modern boiler using coal and heat recovery equipment is about

25 to 30%
40 to 50%
65 to 70%
85 to 90%

Q.3

The draught which a chimney produces is called

induced draught
natural draught
forced draught
balanced draught

Q.4

Evaporative type of condenser has

steam in pipes surrounded by water
water in pipes surrounded by steam
either (A) or (B)
none of the above

Q.5

Blowing down of boiler water is the process

to reduce the boiler pressure
to increase the steam temperature
to control the solid concentration in the boiler water by removing some of the concentrated saline water
none of the above

Q.6

Reheat cycle in steam power plant is used to

utilise heat of flue gases
increase thermal efficiency
improve condenser performance
reduce loss of heat

Q.7

Method which is commonly applied for unloading the coal for small power plant is

lift trucks
coal accelerators
tower cranes
belt conveyor

Q.8

The effect of considering friction losses in steam nozzle for the same pressure ratio leads to

increase in exit velocity from the nozzle
decrease in exit velocity from the nozzle
no change in exit velocity from the nozzle
increase or decrease depending upon the exit quality of steam

Q.9

Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency

Anthracite
Lignite
Semi-bituminous and bituminous
All of the above

Q.10

The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation.

pv = C
pv1A = C
pv1i = C
pv

Q.11

The effect of considering friction in steam nozzles for the same pressure ratio leads to

increase in dryness fraction of exit steam
decrease in dryness fraction of exit steam
no change in the quality of exit steam
decrease or increase of dryness fraction of exit steam depending upon inlet quality

Q.12

Carnot cycle comprises of

two isentropic processes and two constant volume processes
two isentropic processes and two constant pressure processes
two isothermal processes and three constant pressure processes
none of the above

Q.13

For the induced draught the fan is located

near bottom of chimney
near bottom of furnace
at the top of the chimney
anywhere permissible

Q.14

Parson's turbine is

pressure compounded steam turbine
simple single wheel, impulse steam turbine
simple single wheel reaction steam turbine
multi wheel reaction steam turbine

Q.15

Rankine cycle operating on low pressure limit of p1 and high pressure limit of p2

Has higher thermal efficiency than the Carnot cycle operating between same pressure limits
Has lower thermal efficiency than Carnot cycle operating between same pressure limit
Has same thermal efficiency as Carnot cycle operating between same pressure limits
May be more or less depending upon the magnitude of p1 and p2

Q.16

In India largest thermal power station is located at

Kota
Sarni
Chandrapur
Neyveli

Q.17

In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating

Decreases with increase in Rankine cycle efficiency
Increases with increase in Rankine cycle efficiency
Is unaffected by increase in Rankine cycle efficiency
None of the above

Q.18

The draught produced by steel chimney as compared to that produced by brick chimney for the same height is

Less
More
Same
May be more or less

Q.19

Rankine cycle efficiency of a good steam power plant may be in the range of

15 to 20 per cent
35 to 45 per cent
70 to 80 per cent
90 to 95 per ceut

Q.20

Binary vapor cycles are used to

Increase the performance of the condenser
Increase the efficiency of the plant
Increase efficiency of the turbine
None of the above

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