Diesel Engine Types and their Applications MCQ

Test your knowledge with important Diesel Engine Types and their Applications MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Diesel Engine Types and their Applications MCQs on Bissoy. Bissoy App

• Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?
  ক

  inlet valve closing before bottom dead centre

  খ

  inlet valve closing after bottom dead centre

  গ

  inlet valve opening before top dead centre

  ঘ

  exhaust valve closing after top dead centre
• A higher compression ratio causes __________
  ক

  increase in detonation

  খ

  pre-ignition

  গ

  an acceleration in the rate of combustion

  ঘ

  any one of the mentioned
• A diesel engine is __________ as compared to petrol engine, both running at rated load.
  ক

  equally efficient

  খ

  more efficient

  গ

  less efficient

  ঘ

  all of the mentioned
• Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of __________
  ক

  pallets

  খ

  plates

  গ

  pins

  ঘ

  all of the mentioned
• In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
  ক

  equal to

  খ

  below

  গ

  above

  ঘ

  middle
• The fuels in order of decreasing knock tendency for spark ignition engines are __________
  ক

  Paraffin, aromatic, napthene

  খ

  Paraffin, napthene, aromatic

  গ

  Napthene, aromatics, paraffin

  ঘ

  Napthene, paraffin, aromatic
• The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be __________
  ক

  20%

  খ

  25%

  গ

  50%

  ঘ

  55%
• Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to __________
  ক

  overheated spark plug points

  খ

  red hot carbon deposits on cylinder walls

  গ

  cylinder walls being too hot

  ঘ

  any of the mentioned
• What is the purpose of testing an internal combustion engine?
  ক

  to conform the data used in design, the validity of which may be doubtful

  খ

  to satisfy the customer regarding the performance of the engine

  গ

  to determine the information, which cannot be obtained by calculations

  ঘ

  all of the mentioned
• The reference fuels for knock rating of spark ignition engines would include __________
  ক

  normal octane and aniline

  খ

  iso-octane and normal hexane

  গ

  iso-octane and alpha-methyl naphthalene

  ঘ

  normal heptane and iso-octane
• The effective inhibitor of pre-ignition is __________
  ক

  alcohol

  খ

  lead

  গ

  water

  ঘ

  none of the mentioned
• In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the __________
  ক

  end of suction stroke

  খ

  beginning of exhaust stroke

  গ

  beginning of suction stroke

  ঘ

  end of exhaust stroke
• The brake power of a diesel engine, keeping other parameters constant, can be increased by __________
  ক

  increasing the pressure of intake air

  খ

  decreasing the density of intake air

  গ

  decreasing the pressure of intake air

  ঘ

  increasing the temperature of intake air
• The thermal efficiency of diesel engines is about __________
  ক

  30%

  খ

  15%

  গ

  50%

  ঘ

  70%
• The expansion of fuel in a four stroke cycle diesel engine __________
  ক

  starts at 15° after top dead centre and ends at 30° before bottom dead centre

  খ

  starts at top dead centre and ends at 30° after top dead centre

  গ

  may start and end anywhere

  ঘ

  starts at 15° before top dead centre and ends at 30° after top dead centre
• Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is?
  ক

  Carbon dioxide

  খ

  Heavy Water

  গ

  Graphite

  ঘ

  No moderator is needed
• Nuclear Reactors are used __________
  ক

  to produce heat for thermoelectric power

  খ

  to propel ships, submarines, aircrafts

  গ

  to produce fissionable material

  ঘ

  all of the mentioned