MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Molecular Mass

The compressi...

Question

The compression ratio of air is to fuel in a petrol engine varies from 4:1 to 10:1.

A

True

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

False

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A True
True.
It is the ratio of the volume above the piston when it is at the bottom-most position to the volume above the piston when it is at the topmost position. The compression ratio indicates the extent to which the air-fuel mixture is compressed in the engine. The compression ratio of air is to fuel in the diesel engine is 14:1 to 25:1, as compared to petrol engine ratio of 4:1 to 10:1.

Suggest Corrections

thumbs-up

2

Similar questions

Q. A ideal petrol engine consume 0.063 gm of fuel to produce 0.97 kJ of work. The fuel produces 43756 kJ/kg of heat. Assume specific heat for air to be constant. What can be the required compression ratio?

Q. A diesel engine is working with a compression ratio of 15 and expansion ratio of 10. The air standard efficiency of the cycle is

(Assume γ for air=1.4)

Q. Assertion :Fuels with a higher octane rating are used in high performance gasoline engines while fuels with lower octane numbers are ideal for diesel engines Reason: Gasoline engines require higher compression ratios whereas diesel engines do not compress the fuel, but rather compress only air and then inject fuel into the air which was heated by compression

Q. A four-cylinder, four stroke petrol engine is to develop 40 kW at 40 rev/s, when it is designed for a volumetric compression ratio of 10.0 to 1. The ambient air- conditions are 1 bar and

18^{\circ} C

, and the calorific value of the fuel is 44 MJ/kg. If the indicated overall efficiency is 50% of the corresponding air-standard Otto cycle, and the mechanical efficiency is 90%, then the specific fuel consumption ____ g/MJ of brake work. The specific heat capacity ratio for air is 1.4. (Correct upto one decimal place).

Q. An air standard diesel engine cycle with cut off ratio 1.2 and compression ratio 14:1 has air inlet at STP conditions. If the engine now operates first with hydrogen gas and then chlorine gas instead of air with arrange them in correct order of their efficiency.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Molecular Mass

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon