MECHANIC MOTOR VEHICLE THEORY SEMESTER – II MCQ JULY 2018 PART-4

      MECHANIC MOTOR VEHICLE THEORY            SEMESTER–II MCQ JULY 2018 PART-4

The air fuel ratio of the petrol engine is controlled by ……….

a. Fuel pump

b. Governor 

c. Injector

d. Carburettor

Answer : d. Carburettor

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In a diesei engine, the fuel is ignited by-

a. Spark

b. Injected fuel

c. Heat resulting from compressing air that is supplied for combustion

d. Ignition

Answer : c

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ECU enabled electronic injection system is used for -

a. Calculating the appropriate injection timing

b. Meeting only certain operating conditions

c. Closing the injection valve only

d. None of the above

Answer : . None of the above

Scavenging air in diesel engine means -

a. Air used for combustion sent under pressure

b. Forced air for cooling cylinder

c. Burnt air containing products of combustion

d. Air used for forcing burnt gases out of engines

cylinder during the exhaust period

Answer : d

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Fuel is injected in a four-stroke CI engine-

a. At the end of suction stroke

b. At the end of expansion stroke

c. At the end of compression stroke

d. At the end of exhaust stroke

Answer : c. At the end of compression stroke

……….. of fuel is independent of cranking speed and

therefore starting will be easier,
a. Ignition

b. Atomization

c. Condensation

d.  None of these

Answer : b. Atomization

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When the engine is cold, the  ………….. plate

will be in closed position.

a. Nozzle

b. Throttle

c. Air

d. None of these

Answer : b. Throttle

Fugitive emissions consist of-

a. Street dust

b. Dust from construction activities

c. Dust from farm cultivation

d. All of these

Answer : d. All of these

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The function of automobile catalytic converter is to

control emissions of-

a. Carbon dioxide and hydrogen

b. Carbon monoxide and hydrogen

c. Carbon monoxide and carbon dioxide

d. Carbon monoxide and nitrogen dioxide

Answer : d . Carbon monoxide and nitrogen dioxide

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Gaseous pollutants include-

a. Biological decay

b. Forest fires

c. Volcanic eruptions

d. All of these

Answer : d. All of these

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