I.C. Engines

Ignition quailty of petrol is expressed by___________________?

Byadmin January 27, 2019August 16, 2021

Ignition quailty of petrol is expressed by___________________?

A. octane number
B. cetane number
C. calorific value
D. self ignition temperature
E. distillation temperature

I.C. Engines

Piston rings are plated with chromium,cadmium or phosphate in order to__________________?

Piston rings are plated with chromium,cadmium or phosphate in order to__________________?

A. reduce cost
B. improve surface finish
C. prevent clogging
D. reduce wear and eliminate scuffing
E. improve heat transfer

Read More Piston rings are plated with chromium,cadmium or phosphate in order to__________________?
I.C. Engines

The firing order in a six stroke I.C. engine is_________________?

The firing order in a six stroke I.C. engine is_________________?

A. 1-3-6-5-2-4
B. 1-4-2-5-6-3
C. 1-6-2-5-4-3
D. 1-5-2-6-3-4
E. 1-5-3-4-2-6

Read More The firing order in a six stroke I.C. engine is_________________?
I.C. Engines

The inlet value of a four stroke cycle I.C engine remains open for nearly___________________?

The inlet value of a four stroke cycle I.C engine remains open for nearly___________________?

A. 180°
B. 125°
C. 235°
D. 200°
E. 275°

Read More The inlet value of a four stroke cycle I.C engine remains open for nearly___________________?
I.C. Engines

Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

A. Lean mixture
B. Chemically correct fuel air ratio
C. Rich mixture
D. Unpredictable

Read More Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?
I.C. Engines

If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?

If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?

A. give lot of smoke
B. detonate
C. knock
D. not run
E. run for some time and then stop

Read More If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?
I.C. Engines

As a result of detonation in an I.C. engine, following parameter attains very high value _____________________?

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
E. rate of rise of horse-power

Read More As a result of detonation in an I.C. engine, following parameter attains very high value _____________________?

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