Practice Power Plant Engineering In EE Multiple Choice Questions Quiz-2 - MCQGeeks.com

Q.1

The value of the reheat factor is of the order of

0.8 to 1.0
1.0 to 1.05
1.1 to 1.5
above 1.5

Q.2

For the safety of a steam boiler the number of safety valves fitted are

four
three
two
one

Q.3

The draught produced, for a given height of the chimney and given mean temperature of chimney gases

decreases with increase in outside air temperature
increases with increase in outside air temperature
remains the same irrespective of outside air temperature
may increase or decrease with increase in outside air temperature

Q.4

Example of overfeed type stoker is

chain grate
spreader
travelling grate
all of the above

Q.5

In coal preparation plant, magnetic separators are used to remove

Dust
Clinkers
Iron particles
Sand

Q.6

Secondary air is the air used to

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

Q.7

In a regenerative surface condenser

There is one pump to remove air and condensate
There are two pumps to remove air and condensate
There are three pumps to remove air, vapor and condensate
There is no pump; the condensate gets removed by gravity

Q.8

Steam pressure in a steam power station, which is usually kept now-a-days is of the order of

20 kgf/cm²
50 kgf/cm²
80 kgf/cm²
100 kgf/cm²

Q.9

The pressure at the furnace is minimum in case of

forced draught system
induced draught system
balanced draught system
natural draught system

Q.10

For forced draught system, the function of chimney is mainly

to produce draught to accelerate the combustion of fuel
to discharge gases high up in the atmosphere to avoid hazard
to reduce the temperature of the hot gases discharged
none of the above

Q.11

In a steam power plant, the function of a condenser is

to maintain pressure below atmospheric to increase work output from the primemover
to receive large volumes of steam exhausted from steam prime mover
to condense large volumes of steam to water which may be used again in boiler
all of the above

Q.12

The value of reheat factor normally varies from

0.5 to 0.6
0.9 to 0.95
1.02 to 1.06
1.2 to 1.6

Q.13

The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is

0.6
0.578
0.555
0.5457

Q.14

The percentage O2 by Weight in atmospheric air is

18%
23%
77%
79%

Q.15

For the same draught produced the power of induced draught fan as compared to forced draught fan is

less
more
same
not predictable

Q.16

The commercial sources of energy are

solar, wind and biomass
fossil fuels, hydropower and nuclear energy
wood, animal wastes and agriculture wastes
none of the above

Q.17

The critical pressure ratio of a convergent nozzle is defined as

the ratio of outlet pressure to inlet pressure of nozzle
the ratio of inlet pressure to outlet pressure of nozzle
the ratio of outlet pressure to inlet pressure only when mass flow rate per unit area is min-imum
the ratio of outlet pressure to inlet pressure only when mass flow rate = c

Q.18

In fuel cell, the ______ energy is converted into electrical energy.

mechanical
chemical
heat
sound

Q.19

Load carrying capacity of belt conveyor is about

20 to 40 tonnes/hr
50 to 100 tonnes/hr
100 to 150 tonnes/hr
150 to 200 tonnes/hr

Q.20

The proper indication of incomplete combustion is

high CO content in flue gases at exit
high CO2 content in flue gases at exit
high temperature of flue gases
the smoking exhaust from chimney

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