WorksheetsD40 QUIZ OF THE DAY
Total questions: 30
Worksheet time: 30mins
Name
Class
Date
1.
What is the function of a surge tank in a hydroelectric project?
a)
To increase water velocity
b)
To reduce water hammer pressure
c)
To store energy
d)
To purify water
2.
Which turbine is best suited for high head and low discharge?
a)
Francis turbine
b)
Kaplan turbine
c)
Pelton turbine
d)
Propeller turbine
3.
Which part conveys water from the reservoir to the power house?
a)
Draft tube
b)
Penstock
c)
Forebay
d)
Spillway
4.
What type of energy conversion takes place in the turbine of a hydroelectric power plant?
a)
Mechanical to Electrical
b)
Hydraulic to Mechanical
c)
Thermal to Mechanical
d)
Hydraulic to Thermal
5.
Which of the following is NOT an impulse turbine?
a)
Pelton
b)
Turgo
c)
Kaplan
d)
Crossflow
6.
If the gross head is 100 m and net head is 80 m, what is the hydraulic efficiency?
a)
80%
b)
100%
c)
60%
d)
20%
7.
A plant has a turbine efficiency of 90% and generator efficiency of 95%. What is the overall plant efficiency?
a)
85.5%
b)
90%
c)
95%
d)
80%
8.
Which component connects the turbine to the tailrace and increases fluid pressure?
a)
Forebay
b)
Penstock
c)
Draft Tube
d)
Surge Tank
9.
Which turbine is suitable for low head and high discharge?
a)
Pelton
b)
Turgo
c)
Francis
d)
Kaplan
10.
What does the capacity factor of a hydroelectric plant represent?
a)
Installed capacity only
b)
Ratio of actual to maximum potential energy
c)
Overall efficiency
d)
Head loss
11.
Assertion (A): Surge tanks are provided in hydroelectric schemes.
Reason (R): Surge tanks reduce water hammer pressure.
a)
Both A and R are true, and R is the correct explanation
b)
Both A and R are true, but R is not the correct explanation
c)
A is true but R is false
d)
Both A and R are false
12.
Assertion (A): Pelton turbines are used in low head plants.
Reason (R): Pelton turbines operate effectively at high velocity and low discharge.
a)
Both A and R are true, and R is the correct explanation
b)
Both A and R are true, but R is not the correct explanation
c)
A is false but R is true
d)
Both A and R are false
13.
What is the purpose of a forebay in a hydroelectric scheme?
a)
Store sediment
b)
Control voltage
c)
Regulate water before penstock
d)
House generators
14.
Which part of a hydroelectric plant is directly coupled to the generator?
a)
Forebay
b)
Surge tank
c)
Turbine
d)
Draft tube
15.
Which turbine is most efficient under varying load conditions and low heads?
a)
Pelton
b)
Kaplan
c)
Francis
d)
Turgo
16.
The term 'installed capacity' refers to:
a)
Average power produced
b)
Maximum possible power
c)
Minimum operating power
d)
Net energy used
17.
The flume in a hydropower project is:
a)
A storage reservoir
b)
An open channel waterway
c)
A turbine part
d)
A measuring device
18.
Which of the following is a reaction turbine?
a)
Pelton
b)
Crossflow
c)
Kaplan
d)
Turgo
19.
Why are draft tubes diverging in shape?
a)
Reduce head loss
b)
Increase kinetic energy
c)
Recover pressure
d)
Avoid cavitation
20.
Net head is defined as:
a)
Difference between forebay and tailrace levels
b)
Gross head minus losses
c)
Static head
d)
None of the above
21.
Which of these is NOT a component of hydroelectric power scheme?
a)
Penstock
b)
Forebay
c)
Compressor
d)
Surge tank
22.
The life expectancy of a hydropower plant is typically:
a)
20 years
b)
30 years
c)
50 years
d)
10 years
23.
Impulse turbines work on the principle of:
a)
Pressure change
b)
Velocity change
c)
Steam pressure
d)
Air suction
24.
Hydraulic efficiency increases when:
a)
Gross head increases
b)
Net head increases
c)
Friction increases
d)
Turbine efficiency decreases
25.
In hydroelectric plants, load fluctuation leads to:
a)
Thermal cracks
b)
Water hammer
c)
Reverse flow
d)
None of the above
26.
Why are Pelton turbines not used for low head plants?
a)
They are inefficient at low velocity
b)
They are too expensive
c)
They need submerged operation
d)
They rotate slowly
27.
What is the function of the tail race?
a)
Store sediment
b)
Raise water pressure
c)
Discharge water from turbine
d)
Prevent cavitation
28.
If net head is 60 m and overall efficiency is 80%, what is power output for 10 cumecs discharge?
a)
4.7 MW
b)
5.8 MW
c)
6.2 MW
d)
3.9 MW
29.
Assertion (A): Flumes are used to divert water in canals.
Reason (R): They are open channels constructed for controlled water flow.
a)
Both A and R are true, and R is the correct explanation
b)
Both A and R are true, but R is not the correct explanation
c)
A is true but R is false
d)
Both A and R are false
30.
Assertion (A): Surge tanks are always placed downstream of turbines.
Reason (R): They control water pressure before it enters the turbine.
a)
Both A and R are true, and R is the correct explanation
b)
Both A and R are true, but R is not the correct explanation
c)
A is false but R is true
d)
Both A and R are false
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