Q1. As a result of detonation in an I.C. engine, following parameter attains very high value
(A) peak pressure
(B) rate of rise of pressure
(C) rate of rise of temperature
(D) peak temperature

Q2. Which of the following statements is correct?
(A) All the irreversible engines have same efficiency
(B) All the reversible engines have same efficiency
(C) Both Rankine and Caront cycles have same efficiency between same temperature limits
(D) All reversible engines working between same temperature limits have same-efficiency

Q3. Most high speed compression engines operate on
(A) Diesel cycle
(B) Otto cycle
(C) Dual combustion cycle
(D) Special type of air cycle

Q4. The accumulation of carbon in a cylinder results in increase of
(A) clearance volume
(B) volumetric efficiency
(C) ignition time
(D) effective compression ratio

Q5. Which of the following medium is compressed in a Diesel engine cylinder
(A) air alone
(B) air and fuel
(C) air and lubricant oil
(D) fuel alone

Q6. The air-fuel ratio of the petrol engine is controlled by
(A) fuel pump
(B) governor
(C) injector
(D) carburettor

Q7. In a typical medium speed, 4-stroke cycle diesel engine
(A) fuel injection starts at 10° before to dead center and ends at 20° after tor dead center
(B) fuel injection starts at top dead center and ends at 20° after top dead center
(C) fuel injection starts at just before top dead center and ends just after top deac center
(D) may start and end anywhere

Q8. Diesel fuel, compared to petrol is
(A) less difficult to ignite
(B) just about the same difficult to ignite
(C) more difficult to ignite
(D) highly ignitable

Q9. diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of
(A) 250°C
(B) 500°C
(C) 1000°C
(D) 150CPC

Q10. When crude oil is heated, then which of the following hydrocarbon is given off first.
(A) kerosene
(B) gasoline
(C) diesel
(D) natural gas

Q11. The rating of a diesel engine, with increase in air intlet temperature, will
(A) increase linearly
(B) decrease linearly
(C) increase parabolically
(D) decrease parabolically

Q12. A 75 cc engine has following parameter as 75 cc
(A) fuel tank capacity
(B) swept volume
(C) cylinder volume
(D) clearance volume.

Q13. A heat engine utilises the
(A) calorific value of oil
(B) low heat value of
(C) high heat value of oil
(D) mean heat value of oil

Q14. Gaseous-fuel guarantees are based on
(A) calorific value of oil
(B) low heat value of oil
(C) high heat value of oil
(D) mean heat value of oil

Q15. Fuel consumption of diesef engines is not guaranteed at one quarter load because at such low loads
(A) the friction is high
(B) the friction is unpredictable
(C) the small difference in cooling water temperature or in internal friction has a disproportionate effect
(D) the engine is rarely operated

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