Heads in a Turbine multiple choice questions

 Heads in a Turbine

1. Under what head is Pelton turbine operated?
a) 20-50 meters
b) 15-2000 meters
c) 60-200 meters
d) 50-500 meters
Answer: 15-2000 meters
2. Head under which Kaplan turbine is operated______
a) 10-70 meters
b) 70 -100 meters
c) 100-200 meters
d) Above 200 meters
Answer: 10-70 meters
3. Total head of turbines is_______
a) Pressure head + Static head
b) Kinetic head + Static head
c) Static head + Pressure head
d) Pressure head + Kinetic head + Static head
Answer: Pressure head + Kinetic head + Static head
4. The turbine is preferred for 0 to 25 m head of water?
a) Pelton wheel
b) Kaplan turbine
c) Tube turbine
d) Francis turbine
Answer: Kaplan turbine
5. The difference between gross head and friction losses is ____________
a) Net head
b) Gross head
c) Manometric head
d) Net positive suction head
Answer: Net head
6. Among the following which turbine requires more head?
a) Pelton Turbine
b) Kaplan Turbine
c) Francis turbine
d) Tube Turbine
Answer: Pelton Turbine
10. Head lost due to friction is given by k*f*L*v*v/D*2g where f- friction coefficient, L- length of pen stock, D- diameter of penstock and” k” is constant and its value is ____________
a) 2
b) 3
c) 4
d) 5
Answer: 4
11. The head available at inlet of turbine is ____________
a) Net positive suction head
b) Gross head
c) Net head
d) Manometric head
Answer: Net head
12. _____________ is difference between head race and tail race.
a) Gross head
b) Net head
c) Net positive suction head
d) Manometric head
Answer: Gross head
13. Head under which Francis turbine is operated?
a) 10-70 meters
b) 70-100 meters
c) 100-200 meters
d) 40-600 meters
Answer: 40-600 meters
14. The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.
a) Sum
b) Difference
c) Product
d) None of these
Answer: Difference
15. Francis turbine is best suited for ___________
a) Medium head application from 24 to 180 m
b) Low head installation up to 30 m
c) High head installation above 180 m
d) All types of heads
Answer: Medium head application from 24 to 180 m