Power Plants

JKSSB Junior Engineer (Mechanical) · Technical Subjects (Mechanical) · 11 practice questions with answers and explanations: 4 Easy, 7 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Which of these is a water-tube boiler?

  1. Cochran boiler
  2. Lancashire boiler
  3. Locomotive boiler
  4. Babcock and Wilcox boiler
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Answer: D. Water flows inside the tubes and hot gases pass outside.

Sample Easy question 2

The function of a boiler in a steam power plant is to:

  1. Generate steam at high pressure
  2. Pump the water
  3. Condense steam
  4. Drive the generator
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Answer: A. It converts feed water to steam by burning fuel.

Sample Easy question 3

The function of a condenser is to:

  1. Superheat steam
  2. Remove ash
  3. Increase boiler pressure
  4. Condense exhaust steam into water
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Answer: D. A lower condenser pressure increases turbine work.

Sample Medium question 4

The Brayton cycle is the ideal cycle for a:

  1. Refrigerator
  2. Diesel engine
  3. Petrol engine
  4. Gas turbine
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Answer: D. It has two isentropic and two constant-pressure processes.

Sample Medium question 5

Nuclear power plants use fission of:

  1. Uranium (U-235) or plutonium
  2. Carbon
  3. Hydrogen
  4. Helium
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Answer: A. A moderator and control rods are used to manage the chain reaction.

Sample Medium question 6

In a nuclear reactor, control rods are made of a material that:

  1. Conducts heat
  2. Produces neutrons
  3. Absorbs neutrons, such as cadmium or boron
  4. Slows neutrons by collision
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Answer: C. They control the rate of the chain reaction.

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