Q.1
The mechanical friction ___________ with increase in speed.
  • a) reduces
  • b) unpredictable
  • c) increases
  • d) none of the mentioned
Q.2
Which of the following is the outlet cooling water temperature for small engines?
  • a) 60 to 65ºC
  • b) 80ºC
  • c) about 50ºC
  • d) none of the mentioned
Q.3
The weight per B.P. of air-cooled engine is ___________ than that of water-cooled engine.
  • a) less
  • b) unpredictable
  • c) greater
  • d) none of the mentioned
Q.4
Which of the following is/are the correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines?
  • a) 4-stroke S.I. engine, 4-stroke C.I. engine, 2-stroke S.I. engine
  • b) 4-stroke C.I. engine, 4-stroke S.I. engine, 2-stroke S.I. engine
  • c) 4-stroke S.I. engine, 2-stroke S.I. engine, 4-stroke C.I. engine
  • d) 2-stroke C.I. engine, 4-stroke C.I. engine, 4-stroke S.I. engine
Q.5
For which of the following engines a prony brake is used to measure brake power?
  • a) low speed engine
  • b) variable speed engine
  • c) single cylinder engine
  • d) low power engine
Q.6
Which one of the following event would reduce the volumetric efficiency of a vertical compression ignition engine?
  • a) exhaust valve closing after top dead center
  • b) inlet valve closing after bottom dead center
  • c) inlet valve closing before bottom dead center
  • d) inlet valve opening before top dead center
Q.7
Which of the following is the main aim of an engine management system to achieve?
  • a) low levels of gaseous and particulate emissions
  • b) high reliability and durability with lowest possible initial cost
  • c) high power output and torque
  • d) all of the mentioned
Q.8
The ignition timings and thermal load on the engine affect the knock limit of _____________ engine.
  • a) CI
  • b) SI
  • c) Both SI & CI
  • d) None of the mentioned
Q.9
Which of the following engines will have a heavier flywheel than the remaining ones?
  • a) 30 kW four stroke diesel engine running at 750 r.p.m
  • b) 30 kW two stroke diesel engine running at 750 r.p.m
  • c) 30 kW four stroke petrol engine running at 1500 r.p.m
  • d) 30 kW two stroke petrol engine running at 1500 r.p.m
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