Multiple Choice Questions (MCQ) on Internal Combustion (IC) Engines

Multiple Choice Questions (MCQ) on Internal Combustion (IC) Engines

 

Which of the following is not true for internal combustion engine as compare to external combustion engine?

  1. It has lower ratio of weight to output
  2. They are self starting
  3. Higher overall efficiency
  4. Mechanical simplicity

(Ans:b)

 

Heat engine uses ______ energy to produce mechanical work.

  1. Thermal
  2. Fluid
  3. Kinetic
  4. Electric

(Ans:a)

 

Which of the following is not an internal Combustion (IC) engine?

  1. Gas engine
  2. Wankel engine
  3. Jet engine
  4. Stirling engine

(Ans:d)

 

The energy of expanding gas is transferred by piston to connecting rod through

  1. Crank pin
  2. Gudgeon pin
  3. Bearing
  4. Crankcase

(Ans:b)

 

Which of the following is not used in four stroke compression-ignition (CI) engines?

  1. Fuel pump
  2. Spark plug
  3. Fuel injector
  4. Inlet and outlet Valves

(Ans:b)

 

In compression ignition (CI) engine, the compression ratio is

  1. Cylinder volume / Clearance volume
  2. Swept Volume / Cylinder Volume
  3. Clearance volume / Cylinder volume
  4. Cylinder volume / Swept volume

(Ans:a)

 

In two stroke engine there is one power stroke in _____ of crankshaft rotation.

  1. 90°
  2. 180°
  3. 270°
  4. 360°

(Ans:d)

 

In four stroke engine there is one power stroke in _____ of crankshaft rotation.

  1. 180°
  2. 360°
  3. 540°
  4. 720°

(Ans:d)

 

The ascending order of strokes in four stroke engine is

  1. Suction stroke – Expansion stroke – Compression stroke – Exhaust stroke
  2. Suction stroke – Compression stroke – Expansion stroke –Exhaust stroke
  3. Suction stroke – Expansion stroke – Exhaust stroke – Compression stroke
  4. Suction stroke – Compression stroke – Exhaust stroke – Expansion stroke

(Ans:b)

 

In four stroke engine which of the following is also known as power stroke

  1. Suction stroke
  2. Compression stroke
  3. Expansion stroke
  4. Exhaust stroke

(Ans:c)