Explain how the exhaust gases are discharged from the cylinder of a two stroke cycle spark ignition engine.

Explain how the exhaust gases are discharged from the cylinder of a two stroke cycle spark ignition engine.

Answer: At the bottom of the downward stroke the exhaust port is uncovered and the expanding gases are allowed to escape. At the same time the fuel air mixture entering the cylinder removes remaining exhaust gases (scavenging).

The cylinder walls of a four-stroke cycle internal combustion piston engine are often lubricated with oil splashed up from the _________. The oil is kept out of the combustion chamber by the _________.

The cylinder walls of a four-stroke cycle internal combustion piston engine are often lubricated with oil splashed up from the _________. The oil is kept out of the combustion chamber by the _________.

Answer: Crank case,Piston rings

In a four stroke cycle gasoline engine, each cylinder is fitted with two or more ___________ valves, held closely by _________.

In a four stroke cycle gasoline engine, each cylinder is fitted with two or more ___________ valves, held closely by _________.

Answer: poppet,springs

Ignition of the fuel in a diesel engine is achieved by means of:

Ignition of the fuel in a diesel engine is achieved by means of:

a) A precisely timed glow plug
b) The injector delivery valve pressure
c) The heat of compression
d) The fuel injector nozzle
e) A spark plug


Answer: c

Diesel engines require:

Diesel engines require:

a) A spark plug in each cylinder
b) A carburetor
c) A Magneto
d) A fuel injector
e) An ignition distributor


Answer: d

Four cycle engine lubrication is usually:

Four cycle engine lubrication is usually:

a) Forced by pump
b) By gravity oilers
c) By the scoop method
d) By the dip tube method
e) By grease fitting


Answer: a

Diesel engine governing is accomplished by:

Diesel engine governing is accomplished by:

a) Varying the fuel quality
b) Carburetion
c) Varying the fuel quantity
d) Fuel atomizing air quantity
e) Fuel atomizing air pressure


Answer: c