POWER PLANT ENGG MCQ PART 1
1. The commercial sources of energy are
(a)
solar, wind and biomass (b) fossil fuels, hydro power
and nuclear energy (c)
wood, animal wastes and agriculture wastes (d) none of the
above
Ans: b
2. Compounding of steam turbine is done for
(a)
reducing the work done (b) increasing the rotor speed
(c) reducing the rotor speed (d) balancing
the turbine
Ans: c
3. In India largest thermal power station is
located at
(a)
Kota (b) Sarni (c) Chandrapur
(d) Neyveli
Ans: c
4. The percentage O2 by Veight in atmospheric
air is
(a)
18% (b) 23% (c) 77% (d)
79%
Ans: b
5. The percentage 02 by volume in atmosphere air
is
(a)
21% (b) 23% (c) 77% (d)
79%
Ans: a
6. The proper indication of incomplete
combustion is
(a)
high CO content in flue gases at exit
(b) high CO2 content in flue gases at exit
(c) high temperature of flue gases
(d) the smoking exhaust from chimney
Ans: a
7. The main source of production of biogas is
(a)
human waste
(b) wet cow dung
(c) wet livestock waste
(d) all above
Ans: d
8. India’s first nuclear power plant was
installed at
(a)
Tarapore
(b) Kota
(c) Kalpakkam
(d) none of the above
Ans: a
9. In fuel cell, the ______ energy is converted
into electrical energy.
(a)
mechanical
(b) chemical
(c) heat
(d) sound
Ans: b
10. Solar thermal power generation can be
achieved by
(a)
using focusing collector or helio states
(b) using flat plate collectors
(c) using a solar pond
(d) any of the above system
Ans: d
11. The energy radiated by sun on a bright sunny
day is approximately
(a)
700 W/m2
(b) 800 W/m2
(c) 1 kW/m2
(d) 2 kW/m2
Ans: c
12. Thorium Breeder Reactors are most suitable
for India because
(a)
these develop more power
(b) its technology is simple
(c) abundance of thorium deposits are available in India
(d) these can be easily designed
Ans: c
13. The overall efficiency of thermal power
plant is equal to
(a)
Rankine cycle efficiency
(b) Carnot cycle efficiency
(c) Regenerative cycle efficiency
(d) Boiler efficiency x turbine efficiency x generator
efficiency
Ans: c
14. Rankine cycle efficiency of a good steam
power plant may be in the range of
(a)
15 to 20 percent
(6) 35 to 45 percent
(c) 70 to 80 percent
(d) 90 to 95 percent
Ans: b
15. Rankine cycle operating on low pressure
limit of pi an 1 high pressure limit of p2
(a)
has higher thermal efficiency than the carnot cycle operating between
same pressure limits
(b) has lower thermal efficiency than carnot cycle
operating between same pressure limit?
(c) has same thermal efficiency as carnot cycle operating
between same pressure limits
(d) may be more or less depending upon the magnitude ofpi
and/>2
Ans: a
16. Rankine efficiency of a steam power plant
(a)
improves in summer as compared to that in winter
(6) improves in winter as compared to that in summer
(c) is unaffected by climatic conditions
(d) none of the above
Ans: b
17. Carnot cycle comprises of
(a)
two isotropic processes and two constant volume processes
(b) two isentropic processes and two constant pressure processes
(e) two isothermel processes and three constant pressure processes
(d) none of the above
Ans: b
18. In Rankine cycle the work output from the turbine is
given by
(a)
change of internal energy between inlet and outlet
(b) change of enthalpy between inlet and outlet
(c) change of entropy between inlet and outlet
(d) change of temperature between inlet and outlet
Ans: b
19. Regenerative cycle thermal efficiency
(a)
is always greater than simple Rankine thermal efficiency
(b) is greater than simple Rankine cycle
thermal efficiency only when steam is bled at particular pressure
(c) is same as simple Rankine cycle thermal efficiency
(d) is always less than simple Rankine cycle thermal
efficiency
Ans: a
20. In a regenerative feed heating cycle, the
optimum value of the fraction of steam extracted for feed heating
(a)
decreases with increase in Rankine cycle efficiency
(b) increases with increase in Rankine cycle efficiency
(c) is unaffected by increase in Rankine cycle efficiency
(d) none of the above
Ans: b
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