Automobile Engineering Mid - I, September - 2014

1.Which of the following is not an automobile?
  • Motor cycle
  • Passenger car
  • Aeroplane
  • Truck
Answer: C
2.The most commonly used power plant in automobiles is
  • gas turbine
  • I.C. engine
  • battery
  • none of these
Answer: B
3.A basic difference between the spark ignition engine and the diesel engine is that the
  • Diesel engine compresses air alone instead of an air-fuel mixture
  • air temperature ignites the fuel in the diesel engine
  • fuel is sprayed into the combustion chamber in the diesel engine as the piston nears T.D.C on the compression stroke
  • all of the above
Answer: D
4.The self ignition temperature of diesel as compared to petrol is
  • higher
  • lower
  • same
  • depends on fuel quality
Answer: B
5.The auto ignition in a spark ignition engine means
  • automatic ignition of the charge at the end of compression
  • ignition induced by the passage of a spark
  • ignition of the charge before the passage of flame front
  • ignition induced to supplement the process of normal combustion
Answer: C
6.The advantage of the fuel injection system over the carburetor system is
  • improved fuel efficiency
  • improved emission
  • improved power output
  • all of these
Answer: D
7.The ignition in a spark ignition engine takes place when the piston is
  • exactly at the T.D.C position on its compression stroke
  • approaching the T.D.C position on its compression stroke
  • leaving the T.D.C position on its compression stroke
  • approaching the T.D.C position on its exhaust stroke
Answer: B
8.In a Diesel engine, the function of a fuel injector is to
  • mix the fuel and air
  • ignite the air-fuel mixture
  • provide flame front for ignition
  • spray atomized fuel in the cylinder
Answer: D
9.Which of the following oil is more viscous?
  • SAE 30
  • SAE 40
  • SAE 70
  • SAE 80
Answer: D
10.Which of the following indicates a multigrade oil ?
  • SAE 30
  • API SF
  • SAE 20 W-50
  • API 50
Answer: C
11.The power actually developed inside the engine cylinder is called as ___________
Answer: Indicated power
12.In a Diesel engine, the fuel is ignited by ________________
Answer: Heat of compression
13.The Compression ratio in Diesel engines is ___________ than the petrol engine
Answer: More
14.The compression ratio of a petrol engine is nearly ________________
Answer: 8:1
15.In Petrol engines, during suction stroke, ______________ is drawn in the Cylinder
Answer: Air and fuel
16.In Petrol engines, during suction stroke, ______________ is drawn in the Cylinder
Answer: Pre-ignition
17.If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called _________________
Answer: Supercharging
18.The mechanical efficiency of an I.C engine is equal to ________________
Answer: Brake Power / Indicated power
19.The mechanical efficiency of an I.C engine is equal to ________________
Answer: Oil pan
20.The engine Oil is stored in ______________ when the engine is not running
Answer: Crankshaft