Q.1
Indicated power of a 4-stroke engine is equal to ___________
  • a) 4pLAN
  • b) pLAN/2
  • c) pLAN
  • d) 2pLAN
Q.2
The thermal efficiency of diesel engines is about ___________
  • a) 65%
  • b) 50%
  • c) 80%
  • d) 70%
Q.3
What is the combustion in spark ignition engine?
  • a) heterogeneous
  • b) laminar
  • c) homogeneous
  • d) none of the mentioned
Q.4
The following volume of air is required for consuming 1 litre of fuel by a four stroke engine is?
  • a) 5-6m3
  • b) 9-10m3
  • c) 2.5m3
  • d) 1m3
Q.5
The major loss in a S.I. engine is due to ____________
  • a) variation in specific heat and chemical equilibrium
  • b) pumping
  • c) exhaust blow down
  • d) incomplete combustion
Q.6
What is the firing order of a six stroke I.C. engine?
  • a) 1-5-3-4-2-6
  • b) 1-3-6-5-2-4
  • c) 1-4-2-5-6-3
  • d) 1-6-2-5-4-3
Q.7
Which of the following is the most preferred S.I. engines fuel?
  • a) napthenes
  • b) olefins
  • c) aromatics
  • d) paraffins
Q.8
Which of the following statement is not correct with respect to alcohols as alternate fuel in IC engines?
  • a) alcohol contains about half the heat energy of gasoline/litre
  • b) alcohol does not vaporize as easily as gasoline
  • c) alcohols are corrosive in nature
  • d) anti-knock characteristics of alcohol is poor
Q.9
Which of the following is the anti-knock for compression ignition engines?
  • a) amyl nitrate
  • b) naphthene
  • c) hexadecane
  • d) tetra ethyl lead
Q.10
Which of the following does not relate to spark ignition engine?
  • a) Spark plug
  • b) Carburetor
  • c) Fuel injector
  • d) Ignition coil
Q.11
Which is the most effective air cleaner in the case of diesel engines?
  • a) whirl type
  • b) oil bath type
  • c) wet type
  • d) dry type
Q.12
An SI engine sometimes continues to run for a very small period even after the ignition is switched off. This phenomenon is called?
  • a) throttling
  • b) idling
  • c) dieseling
  • d) none of the mentioned
Q.13
Which are the most important requirements of an automobile carburetor?
  • a) ensuring full torque at low speeds
  • b) good fuel economy
  • c) absence of racing of the engine under idling conditions
  • d) all of the mentioned
Q.14
The number of holes in a multi-hole nozzle, varies from ___________
  • a) 4 to 8
  • b) 4 to 18
  • c) 4 to 12
  • d) none of the mentioned
Q.15
Gasoline engines are _____________ than diesel engines.
  • a) lighter
  • b) unpredictable
  • c) heavier
  • d) none of the mentioned
Q.16
Formation of ice on the _____________ plate is eliminated in electronic fuel injection.
  • a) engine
  • b) throttle
  • c) nozzle
  • d) none of the mentioned
Q.17
The timing of injection has to be advanced as the speed _____________
  • a) increases
  • b) stables
  • c) decreases
  • d) none of the mentioned
Q.18
The ignition timing is affected by _____________
  • a) engine speed
  • b) mixture strength
  • c) compression ratio
  • d) all of the mentioned
Q.19
Which of the following factors affecting combustion in the CI engine?
  • a) intake temperature
  • b) jacket water temperature
  • c) compression ratio
  • d) all of the mentioned
Q.20
Blow by losses are reduced as the engine speed is ____________
  • a) reduced
  • b) unpredictable
  • c) increased
  • d) none of the mentioned
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