Freshers India

Engineering - Mechanical Engineering

You Are Here :: Home > Mechanical Engineering > I.C. Engines -General Questions

13.

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

14.

Engine pistons 'are usually made of aluminum alloy because it

A.	is lighter	B.	wears less
C.	absorbs shocks	D.	is stronger

15.

Flash point of fuel oil is

A.	minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame	B.	temperature at which it solidifies or congeals
C.	temperature at which it catches fire without external aid	D.	indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off

16.

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

17.

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

18.

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

A.	naturally aspirated	B.	supercharged
C.	centrifugal pump	D.	turbo charger

« prev

Catch Us on