Generation-01:
1) Turbo alternators run at speeds
a. Constant speed of 3000 rpm.
b. Constant speed of 1000 rpm.
c. A variable speed of above 1000 rpm.
d. None of the above
2) A steam turbine with no nozzle is ________________.
a. Reaction turbine
b. Impulse turbine
c. Both (a) and (b)
d. None of these
3) The pipes carrying the steam are made of _________.
a. Steel
b. Cast iron
c. Aluminium
d. Cobalt
4) The governing principle of steam turbines are ________________.
a. Nozzle control governing
b. Throttle governing
c. Bypass governing
d. All of these
5) The reheat factor in a steam turbine depends on
a. Stage efficiency.
b. Initial pressure and temperature.
c. Exit pressure.
d. All of the above.
6) The use of air preheater increase the temp of the air by about______________.
a. 50°
b. 20°
c. 5°
d. 30°
7) Air- preheater in a steam power plant_____________.
a. Recovers the heat from the flue gases leaving the economiser.
b. Improves combustion rate.
c. Raises the temperature of the furnace gases.
d. All of these.
8) The definition of the draught system is
a. A device used to pull in air.
b. The difference between absolute gas pressure at any point in a gas flow and the ambient atmospheric pressure.
c. The sum of the absolute gas pressure at any point in a gas flow and the ambient atmospheric pressure.
d. A device used to pull out air.
9) The draught produced by the chimney is________________.
a. Forced draught
b. Natural draught
c. Induced draught
d. Balanced draught
10) A condenser condenses the steam coming out from___________.
a. Boiler
b. Turbine
c. Economiser
d. Super heater
11) Water used in the steam plant is used for cooling in_______________.
a. Condenser
b. Turbine only
c. Boiler tube
d. Boiler tubes and turbines
12) What is use of the air pumps in the condenser?
a. Remove water
b. Air leaking in the condenser and to maintain the vacuum
c. Maintain atmospheric pressure and the condenser
d. Both (a) & (b)
13) Spray ponds are used to cool the warm water coming from the condenser in ________.
a. Large power plants
b. Small power plants
c. Medium power plants
d. Both medium and large power plants.
14) Evaporative type of condenser has
a. Water in pipes surrounded by steam outside.
b. Steam and cooling water mixed to give the condensate.
c. Steam in pipes surrounded by water.
d. None of the above.
15) The best coal suitable for the production of energy is_________________.
a. Lignite
b. Bituminous
c. Anthracite
d. Peat
16) Name the system that is mainly employed for the disposal of fly ash.
a. Pneumatic
b. Hydraulic
c. Both (a) & (b)
d. Steam jet system
17) What is the superior quality of coal called?
a. Anthracite
b. Coke
c. Bituminous
d. Peat
18) The coal with highest ash content is ________.
a. Lignite
b. Steam coal
c. Coking coal
d. Bituminous coal
19) On which factor does the calorific value of coal depend?
a. Ash content.
b. Size of coal particles
c. Moisture content.
d. Volatile material.
20) The elements that are combustible in the fuel are
a. Carbon and hydrogen.
b. Carbon, hydrogen and ash.
c. Carbon, hydrogen and sulphur.
d. Carbon, nitrogen and ash.
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1 Comments
nice for study
ReplyDeletevery helpful..