Online Test-1, "IC Engines", I Year EIE (2023-27 Batch)

A 150 cc engine has following parameter as 150 cc

• fuel tank capacity

• swept volume

• cylinder volume

• clearance volume.

Compression ratio of LC. engines is

• The ratio of volumes of air in cylinder before compression stroke and after compression stroke

• volume displaced by piston per stroke and clearance volume in cylinder

• ratio of pressure after compression and before compression

• swept volume/cylinder volume

The operation of forcing additional air under pressure in the engine cylinder is known as

• Scavenging

• Turbulence

• Supercharging

• Pre-ignition

The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

• 1/2 (i.e. 0.5)

• 1

• 2

• 4

Which of the following is not an internal combustion engine?

• 2-stroke petrol engine

• 4-stroke petrol engine

• diesel engine

• steam turbine

In a diesel engine, the fuel is ignited by

• spark

• injected fuel

• heat resulting from compressing air that is supplied for combustion

• ignition

• combustion chamber.

A diesel engine has compression ratio from

• 6 to 10

• 10 to 15

• 16 to 20

• 25 to 40

For same compression ratio and for same heat added

• Otto cycle is more efficient than Diesel Cycle

• Diesel cycle is more efficient than Otto Cycle

• Efficiency depends on other factors

• None of the mentioned

The air fuel ratio of the petrol engine is controlled by

• fuel pump

• governor

• injector

• carburettor

A stoichiometric air fuel ratio is

• chemically correct mixture

• lean mixture

• rich mixture for idling

• rich mixture for over loads