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Economics Of Power Generation
Quiz 3
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Q.1
Annual operating expenditure of a power plant consists of
fixed charges
semi-fixed charges
running charges
all of the above
Q.2
A pilot exciter is provided on generators for which of the following reasons ?
To excite the poles of main exciter
To provide requisite starting torque to main exciter
To provide requisite starting torque to generator
None of the above
Q.3
Which of the following source of power is least reliable ?
Solar energy
Geothermal power
Wind power
MHD
Q.4
For a power plant which of the following constitutes running cost?
Cost of wages
Cost of fuel
Cost of lubricants
All of the above
Q.5
Annual depreciation of the plant it proportional to the earning capacity of the plant vide
sinking fund depreciation
straight line depreciation
reducing balances depreciation
none of the above
Q.6
Which of the following is not a source of power ?
Thermocouple
Photovoltaic cell
Solar cell
Photoelectric cell
Q.7
A company can raise funds through
fixed deposits
shares
bonds
any of the above
Q.8
Load curve of a power plant has always
zero slope
positive slope
negative slope
any combination of (A), (B) and (C)
Q.9
For a diesel generating station the useful life is expected to be around
15 to 20 years
20 to 50 years
50 to 75 years
75 to 100 years
Q.10
Which lightening stroke is most dangerous ?
Direct stroke on line conductor
Indirect stroke on conductor
Direct stroke on tower top
Direct stroke on ground wire
Q.11
Direct conversion of heat into electric power is possible through
fuel cell
batteries
thermionic converter
all of the above
Q.12
Is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order,
Hot reserve
Cold reserve
Spinning reserve
Firm power
Q.13
Load curve helps in deciding
total installed capacity of the plant
sizes of the generating units
operating schedule of generating units
all of the above
Q.14
Depreciation charges are high in case of
thermal plant
diesel plant
hydroelectric plant
none of the above
Q.15
_______ is invariably used as base load plant.
Diesel engine plant
Nuclear power plant
Gas turbine plant
Pumped storage plant
Q.16
An alternator coupled to a _____ runs at slow speed, as compared to as compared to others.
diesel engine
hydraulic turbine
steam turbine
gas turbine
Q.17
________ is invariably used for peak load
Nuclear power plant
Steam turbine plant
Pumped storage plant
None of the above
Q.18
________ will be least affected due to charge in supply voltage frequency.
Electric clock
Mixer grinder
Ceiling fan
Room heater
Q.19
Direct conversion of heat into electrical energy is possible through
fuel cells
solar cells
MHD generators
none of the above
Q.20
Power plant is expected to have the longest life.
Steam
Diesel
Hydroelectric
Any of the above
Q.21
Load factor of a power station is defined as
maximum demand/average load
average load x maximum demand
average load/maximum demand
(average load x maximum demand)172
Q.22
Generating capacity connected to the bus bars and ready to take load when switched on is known as
firm power
cold reserve
hot reserve
spinning reserve
Q.23
For a consumer the most economical power factor is generally
0.5 lagging
0.5 leading
0.95 lagging
0.95 leading
Q.24
public sector undertaking is associated with erection and sometimes running of thermal power plants
NTPC
SAIL
BEL
BHEL
Q.25
Which of the following is not necessarily an advantage of interconnecting various power stations?
Improved frequency of power supplied
Reduction in total installed capacity
Increased reliability
Economy in operation of plants
Q.26
In a power plant if the maximum demand on the plant is equal to the plant capacity, then
Plant reserve capacity will be zero
Diversity factor will be unity
Load factor will be unity
Load factor will be nearly 60%
Q.27
An over excited synchronous motor on noload is known as
synchronous condenser
generator
induction motor
alternator
Q.28
With reference to a power station which of the following is not a fixed cost?
Fuel cost
Interest on capital
Insurance charges
Depreciation
Q.29
Incase of ______ fuel transportation is the major problem.
diesel power plants
nuclear power plants
hydro-electric power plants
thermal power plants
Q.30
A low utilization factor for a plant indicates that
plant is used for stand by purpose only
plant is under maintenance
plant is used for base load only
plant is used for peak load as well as base load
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