1. The output power of the centrifugal pump is proportional to the _________ of the speed.
A. Square
B. Cube
C. Square-root
D. Cube-root
Answer: B
The output power of the centrifugal pump is proportional to the cube of the speed. They require a small torque to start.
2. There are four types of Water pumps.
A. True
B. False
Answer: B
There are two types of Water pumps. Centrifugal and reciprocating are the major types of water pumps.
3. The output of the Solar panel is DC.
A. True
B. False
Answer: A
The output of the solar panel is DC. Inverters are used at the output terminals of the solar panel in order to convert DC into AC.
4. Which of the relationship is correct in a Permanent magnet DC motor?
A. T ∝ (Ia)2
B. T ∝ (Ia)0
C. T ∝ Ia
D. T2 ∝ Ia
Answer: C
The value of flux remains constant in the Permanent magnet DC motor. The torque in the PMMC motor is directly proportional to the armature current.
5. Calculate the Fill factor using the data: Pmax=5 W, Voc=5 V, Isc=1 A.
A. 5
B. 3
C. 2
D. 1
Answer: D
The fill factor is the ratio of the maximum obtainable power to the product of the open-circuit voltage and short circuit current.
F.F=Pmax÷(Voc×Isc)=5/5=1.
6. Full form of ICE is ____________
A. Internal Combustion Engine
B. International Combustion Engine
C. Iterative Combustion Engine
D. Iterative Commercial Engine
Answer: A
The full form of ICE is International Combustion Engine. It consists of pistons inside the closed chamber in order to drive the machine.
7. Which of the relationship is correct in a Permanent magnet DC motor?
A. E ∝ (N)2
B. E ∝ (N)0
C. E ∝ N
D. E2 ∝ N
Answer: C
The value of flux remains constant in the Permanent magnet DC motor. The back e.m.f in the PMMC motor is directly proportional to the speed.
8. Full form of SSS is ____________
A. Saur Sujala Yojana
B. Saur Solar Yojana
C. Solar Sun Yojana
D. Sun Sujala Yojana
Answer: A
Full form of SSS is Saur Sujala Yojana. It is an initiative by the Government of India to encourage people to use solar energy as an energy source.
9. Who made the first solar cell?
A. Gerald Pearson
B. Tim Bell
C. Tim Cook
D. Nicola Tesla
Answer: A
The first solar cell was made by Gerald Pearson in 1954 in Bell laboratories. It was a lithium-silicon photovoltaic cell.
10. When was the first solar cell invented?
A. 1950
B. 1954
C. 1965
D. 1952
Answer: B
The first solar cell was made by Gerald Pearson in 1954 in Bell laboratories. It was a lithium-silicon photovoltaic cell.
