Automobile Engineering(Mechanical Engineering ) Questions and Answers

Question 1. In a ventilated disc brake
  1.    A duct directs air towards the caliper for cooling while the vehicle is moving
  2.    Caliper is covered with cooling fins
  3.    Disc contains many small holes for optimum cooling performance
  4.    Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Explanation:-
Answer: Option D. -> Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
The "ventilated" disc design helps to dissipate the generated heat and is commonly used on the more-heavily loaded front discs.
Question 2. The most commonly used power plant in automobiles is
  1.    Gas turbine
  2.    I.C. engine
  3.    Battery
  4.    None of these
Explanation:-
Answer: Option B. -> I.C. engine
The most commonly used power plant in automobiles is I.C. engine
Question 3. A traction control system (TCS) in automobiles controls the
  1.    Vibrations on the steering wheel
  2.    Engine power during acceleration
  3.    Torque that is transmitted by the tyres to the road surface
  4.    Stopping distance in case of emergency
Explanation:-
Answer: Option C. -> Torque that is transmitted by the tyres to the road surface
A traction control system (TCS) in automobiles controls the torque that is transmitted by the tyres to the road surface
Question 4. The number of exhaust manifolds in a V6 engine is
  1.    One
  2.    Two
  3.    Four
  4.    Eight
Explanation:-
Answer: Option B. -> Two
The number of exhaust manifolds in a V6 engine is Two
Question 5. The commonly used antifreeze solution in automobiles is
  1.    Carbon disulphide
  2.    Ethylene glycol
  3.    Ammonium chloride
  4.    Freon-12
Explanation:-
Answer: Option B. -> Ethylene glycol
The commonly used antifreeze solution in automobiles is Ethylene glycol
Question 6. The operation of removing trapped air from the hydraulic braking system is known as
  1.    Trapping
  2.    Tapping
  3.    Bleeding
  4.    Cleaning
Explanation:-
Answer: Option C. -> Bleeding
The operation of removing trapped air from the hydraulic braking system is known as Bleeding.
Question 7. The ease with which petrol vaporizes is called its
  1.    Oxidation
  2.    Octane number
  3.    Volatility
  4.    Cetane number
Explanation:-
Answer: Option C. -> Volatility
The ease with which petrol vaporizes is called its Volatility
Question 8. If the engine coolant leaks into the engine oil, then engine oil
  1.    Appears milky
  2.    Become foamy
  3.    Turns black
  4.    None of these
Explanation:-
Answer: Option A. -> Appears milky
If the engine coolant leaks into the engine oil, then engine oil Appears milky
Question 9. A heat treated glass generally used in automobiles bursts into ________ upon cracking,
  1.    Sharp edged fragments
  2.    Small particles
  3.    Large particles
  4.    None of these
Explanation:-
Answer: Option B. -> Small particles
A heat treated glass generally used in automobiles bursts into Small particles upon cracking,
Question 10. The engine oil viscosity is defined by ___________ ratings.
  1.    Automatic transmission fluid (ATF)
  2.    Society of automotive engineers (SAE)
  3.    Gross vehicle weight (GVW)
  4.    American petroleum institute (API)
Explanation:-
Answer: Option B. -> Society of automotive engineers (SAE)
The engine oil viscosity is defined by Society of automotive engineers (SAE) ratings.
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