Practice Power Plant Engineering In EE Multiple Choice Questions Quiz-5 - MCQGeeks.com

Q.1

The draught produced by chimney of given height at given outside temperature

decreases if the chimney gas temperature increases
increases if the chimney gas temperature increases
remains same irrespective of chimney gas temperature
may increase or decrease

Q.2

Rankine efficiency of a steam power plant

improves in summer as compared to that in winter
improves in winter as compared to that in summer
is unaffected by climatic conditions
none of the above

Q.3

The artificial draught normally is designed to produce

less smoke
more draught
less chimney gas temperature
all of the above

Q.4

Curtis turbine is

reaction steam turbine
pressure velocity compounded steam turbine
pressure compounded impulse steam turbine
velocity compounded impulse steam turbine

Q.5

Mercury is a choice with steam in binary vapour cycle because it has

higher critical temperature and pressure
higher saturation temperature than other fluids
relatively low vapourisation pressure
all above

Q.6

In regenerative cycle feed water is heated by

exhaust gases
heaters
draining steam from the turbine
all above

Q.7

Artificial draught is produced by

induced fan
forced fan
induced and forced fan
all of the above

Q.8

In a shell and tube surface condenser

steam and cooling water mix to give the condensate
cooling water passes through the tubes and steam surrounds them
steam passes through the cooling tubes and cooling water surrounds them
all of the above varying with situation

Q.9

Economisers improve boiler efficiency by

1 to 5%
4 to 10%
10 to 12%
8 to 12%

Q.10

Primary air is that air which is used to

reduce the flame length
increase the flame length
transport and dry the coal
provide air around burners for getting optimum combustion

Q.11

Steam turbines commonly used in steam power station are

condensing type
non-condensing type
both (A) and (B)
none of the above

Q.12

India's first nuclear power plant was installed at

Tarapore
kota
Kalpakkam
none of the above

Q.13

In ______ system fuel from a central pulverizing unit is delivered to a bunker and then to the various burners

unit
central
power
none of the above

Q.14

Compounding of steam turbine is done for

reducing the work done
increasing the rotor speed
reducing the rotor speed
balancing the turbine

Q.15

In Rankine cycle the work output from the turbine is given by

change of internal energy between inlet and outlet
change of enthaply between inlet and outlet
change of entropy between inlet and outlet
change of temperature between inlet and outlet

Q.16

In a boiler installation the natural draught is produced

due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
due to the fact that at the chimney top the pressure is more than its environmental pressure
all of the above

Q.17

In a regenerative feed heating cycle, the greatest economy is affected

when steam is extracted from only one suitable point of steam turbine
when steam is extracted from several places in different stages of steam turbine
when steam is extracted only from the last stage of steam turbine
when steam is extracted only from the first stage of steam turbine

Q.18

In jet type condensers

cooling water passes through tubes and steam surrounds them
steam passes through tubes and cooling water surrounds them
steam and cooling water mix
steam and cooling water do not mix

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