Which of the following fuel has little tendency towards detonation?

Question

Which of the following fuel has little tendency towards detonation?

A. Benzene

B. Iso-octane

C. Normal heptane

D. Alcohol

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Morse test is used to determine the I.P. of a

A. Single cylinder petrol engine

B. Four stroke engine

C. Single cylinder diesel engine

D. Multi cylinder engine

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Which of the following medium is compressed in a Diesel engine cylinder?

A. Air alone

B. Air and fuel

C. Air and lub oil

D. Fuel alone

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Most high speed compression engines operate on

A. Otto cycle

B. Diesel cycle

C. Dual cycle

D. Carnot cycle

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In a typical medium speed 4-stroke cycle diesel engine the inlet valve

A. Opens at 20° before top dead center and closes at 35° after the bottom dead center

B. Opens at top dead center and closes at bottom dead center

C. Opens at 10° after top dead center and closes 20° before the bottom dead center

D. May open or close anywhere

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The increase in intake temperature of internal combustion engines will _________ efficiency.

A. Have no effect on

B. Increase

C. Decrease

D. None of these

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In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

A. Fuel pump

B. Fuel injector

C. Spark plug

D. None of these

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The theoretically correct mixture of air and petrol is

A. 10 : 1

B. 15 : 1

C. 20 : 1

D. 25 : 1

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For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

A. 9 : 1

B. 12 : 1

C. 15 : 1

D. 18 : 1

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The air-fuel ratio of the petrol engine is controlled by

A. Fuel pump

B. Governor

C. Injector

D. Carburettor

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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

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Which of the following fuel detonates readily?

A. Benzene

B. Iso-octane

C. Normal heptane

D. Alcohol

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For the same power developed in I.C. engines, the cheaper system is

A. Naturally aspirated

B. Supercharged

C. Centrifugal pump

D. Turbo charger

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Which of the following is the lightest and most volatile liquid fuel?

A. Diesel

B. Kerosene

C. Fuel oil

D. Gasoline

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In 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. 2000°C

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The mechanical efficiency (ηm) of the engine is given by

A. η_m = B.P/I.P

B. η_m = I.P/B.P

C. η_m = (B.P × I.P)/100

D. None of these

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Number of working strokes per min. for a two stroke cycle engine is _________ the speed of the engine in r.p.m.

A. Equal to

B. One-half

C. Twice

D. Four-times

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The thermal efficiency of diesel engines is about

A. 15 %

B. 30 %

C. 50 %

D. 70 %

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Which of the following statement is wrong?

A. A four stroke cycle engine develops twice the power as that of a two stroke cycle engine

B. For the same power developed, a four stroke cycle engine is lighter, less bulky and occupies less floor area

C. The petrol engines are costly than diesel engines

D. All of the above

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The function of a distributor in a coil ignition system of I.C. engines is

A. To distribute spark

B. To distribute power

C. To distribute current

D. To time the spark

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The normal heptane (C₇H₁₆) is given a rating of ________ octane number.

A. 0

B. 50

C. 100

D. 120

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The thermal efficiency of diesel engines on weak mixtures is

A. Unaffected

B. Lower

C. Higher

D. Dependent on other factors

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The rating of a diesel engine, with increase in air inlet temperature, will

A. Increase linearly

B. Decrease linearly

C. Increase parabolically

D. Decrease parabolically

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In loop scavenging, the top of the piston is

A. Flat

B. Contoured

C. Slanted

D. Depressed

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For the same compression ratio

A. Otto cycle is more efficient than the Diesel

B. Diesel cycle is more efficient than Otto

C. Both Otto and Diesel cycles are, equally efficient

D. Compression ratio has nothing to do with efficiency

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Which of the following fuel has little tendency towards detonation?

A. Benzene

B. Iso-octane

C. Normal heptane

D. Alcohol

Discuss this answer

The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

A. Same

B. Less

C. More

D. None of these

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Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.

A. Half

B. Same

C. Double

D. Four times

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If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

A. Exhaust will be smoky

B. Piston rings would stick into piston grooves

C. Engine starts overheating

D. Scavenging occurs

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The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S = Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

A. B.P = (Wl × 2πN)/60 watts

B. B.P = [(W - S) πDN]/60 watts

C. B.P = [(W - S) π (D + d) N]/60 watts

D. All of these

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The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called

A. Mechanical efficiency

B. Overall efficiency

C. Indicated thermal efficiency

D. Volumetric efficiency

Discuss this answer

Accepted Answer

B. Iso-octane

Which of the following fuel has little tendency towards detonation?

Correct Answer :

Show all Internal Combustion MCQ

Related Questions

Morse test is used to determine the I.P. of a

Which of the following medium is compressed in a Diesel engine cylinder?

Most high speed compression engines operate on

In a typical medium speed 4-stroke cycle diesel engine the inlet valve

The increase in intake temperature of internal combustion engines will _________ efficiency.

In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

The theoretically correct mixture of air and petrol is

For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

The air-fuel ratio of the petrol engine is controlled by

Gaseous fuel guarantees are based on

Which of the following fuel detonates readily?

For the same power developed in I.C. engines, the cheaper system is

Which of the following is the lightest and most volatile liquid fuel?

In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

The mechanical efficiency (ηm) of the engine is given by

Number of working strokes per min. for a two stroke cycle engine is _________ the speed of the engine in r.p.m.

The thermal efficiency of diesel engines is about

Which of the following statement is wrong?

The function of a distributor in a coil ignition system of I.C. engines is

The normal heptane (C₇H₁₆) is given a rating of ________ octane number.

The thermal efficiency of diesel engines on weak mixtures is

The rating of a diesel engine, with increase in air inlet temperature, will

In loop scavenging, the top of the piston is

For the same compression ratio

Which of the following fuel has little tendency towards detonation?

The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.

If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S = Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called

Also checkout

Which of the following fuel has little tendency towards detonation?

Correct Answer :

Show all Internal Combustion MCQ

Related Questions

Morse test is used to determine the I.P. of a

Which of the following medium is compressed in a Diesel engine cylinder?

Most high speed compression engines operate on

In a typical medium speed 4-stroke cycle diesel engine the inlet valve

The increase in intake temperature of internal combustion engines will _________ efficiency.

In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

The theoretically correct mixture of air and petrol is

For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

The air-fuel ratio of the petrol engine is controlled by

Gaseous fuel guarantees are based on

Which of the following fuel detonates readily?

For the same power developed in I.C. engines, the cheaper system is

Which of the following is the lightest and most volatile liquid fuel?

In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

The mechanical efficiency (ηm) of the engine is given by

Number of working strokes per min. for a two stroke cycle engine is _________ the speed of the engine in r.p.m.

The thermal efficiency of diesel engines is about

Which of the following statement is wrong?

The function of a distributor in a coil ignition system of I.C. engines is

The normal heptane (C7H16) is given a rating of ________ octane number.

The thermal efficiency of diesel engines on weak mixtures is

The rating of a diesel engine, with increase in air inlet temperature, will

In loop scavenging, the top of the piston is

For the same compression ratio

Which of the following fuel has little tendency towards detonation?

The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.

If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S = Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called

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The normal heptane (C₇H₁₆) is given a rating of ________ octane number.