Mcqs or Objective Questions On power systems | only4electrical | Electrical Objective Questions and answers
1). What is the approximate efficiency of a normal thermal power station ?
a)
30-40%
30-40%
b)
45-55%
45-55%
c)
20-25%
20-25%
d)
60-70%
60-70%
2). The advantage of hydro electric power station over thermal power station is
a)
The initial cost of hydro electric power station is low
The initial cost of hydro electric power station is low
b)
The operation cost of hydro electric power station is low
The operation cost of hydro electric power station is low
c)
Hydro electric power station can supply the power throughout the year
Hydro electric power station can supply the power throughout the year
d)
Hydro electric station can be constructed at the place where the energy is required
Hydro electric station can be constructed at the place where the energy is required
3). In which of the following frequency control method tie line may be overloaded
a)
Flat frequency control
Flat frequency control
b)
Flat tie line control
Flat tie line control
c)
Parallel frequency
Parallel frequency
d)
All of the above
All of the above
4).Which of the following
statements is/are true ?
statements is/are true ?
a)
A thermal reactor needs a moderator materiel
A thermal reactor needs a moderator materiel
b)
In nuclear reactor, mltiplication factor is kept almost equal to one
In nuclear reactor, mltiplication factor is kept almost equal to one
c)
Nuclear power plants are used as peak load plants only
Nuclear power plants are used as peak load plants only
d)
Both 1 and 2
Both 1 and 2
5) A power station has a maximum demand of 15 MW. The plant capacity is 20 MW. Find the reserve capacity of the plant?
a)
5 MW
5 MW
b)
15 MW
15 MW
c)
20 MW
20 MW
d)
10 MW
10 MW
6) When a pumped storage power plant is operated in conjunction with a steam power plant
a)
The operating cost of the steam plant become optimum
The operating cost of the steam plant become optimum
b)
load factor of the steam plant is increased
load factor of the steam plant is increased
c)
Chances of the tripping of the system decreas
Chances of the tripping of the system decreas
d)
All of the above
All of the above
7).Demand factor of a plant is
a)
0
0
b)
1
1
c)
Less then 1
Less then 1
d)
Greater then 1
Greater then 1
8).The economics of power plant is greatly influenced by
a)
Load factor
Load factor
b)
Diversity factor
Diversity factor
c)
Both 1 and 2
Both 1 and 2
d)
Nether 1 nor 2
Nether 1 nor 2
9).Pelton turbine is a…….turbine
a)
Axial flow
Axial flow
b)
Inword radial flow
Inword radial flow
c)
Impulsive
Impulsive
d)
any of the above
any of the above
10). Which of the following is low specific speed turbine ?
a)
Pelton
Pelton
b)
Kaplan
Kaplan
c)
Francis
Francis
d)
Non of the above
Non of the above
Keys
Mcqs on electrical power systems
Mcqs on power system pdf
j.b guptha electrical objective questions
power system objective questions and answers pdf
electrical mcqs questions and answers
