An atom bomb utilises uncontrolled nuclear fission. True False

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Home ‣ Mechanical Engineering ‣ IC Engines and Nuclear Power Plants Comments

Question
An atom bomb utilises uncontrolled nuclear fission.
Options
A. True
B. False

Correct Answer

True

IC Engines and Nuclear Power Plants problems

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1. In qualitative governing, the quantity of fuel is varied to suit the load on the engine and the total charge of air is altered.
Options
A. Correct
B. Incorrect

Discuss

Correct Answer: Incorrect

2. In a four stroke cycle diesel engine, the exhaust valve
Options
A. opens at 30� before bottom dead cnetre and closes at 10� after top dead centre
B. opens at 30� after bottom dead centre and closes at 10� before top dead centre
C. opens at bottom dead centre and closes at top dead centre
D. may open and close anywhere

Discuss

Correct Answer: opens at 30� before bottom dead cnetre and closes at 10� after top dead centre

3. The maximum propulsive efficiency of a turbo-jet engine is at a speed of
Options
A. 1000 km/h
B. 2000 km/h
C. 2400 km/h
D. 3000 km/h

Discuss

Correct Answer: 2400 km/h

4. Uranium has isotopes
Options
A. U₂₃₄
B. U₂₃₅
C. U₂₃₈
D. all of these

Discuss

Correct Answer: all of these

5. The advancing of spark timing in spark ignition engines will __________ knocking tendency.
Options
A. increase
B. reduce
C. not effect

Discuss

Correct Answer: increase

6. A two stroke cycle engine gives __________ mechanical efficiency than a four stroke cycle engine.
Options
A. higher
B. lower

Discuss

Correct Answer: higher

7. Light weight substances can not be effective moderators.
Options
A. True
B. False

Discuss

Correct Answer: False

8. Morse test is used to determine the I.P. of a
Options
A. single cylinder petrol engine
B. four stroke engine
C. single cylinder diesel engine
D. multi-cylinder engine

Discuss

Correct Answer: multi-cylinder engine

9. The unit million electron volts (Mev) is commonly used to measure the nuclear energy.
Options
A. True
B. False

Discuss

Correct Answer: True

10. The compression ratio in petrol engines is kept low as compared to diesel engines because higher compression ratio in petrol engines would lead to pre-ignition of fuel.
Options
A. Agree
B. Disagree

Discuss

Correct Answer: Agree

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IC Engines and Nuclear Power Plants problems

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