IC Engine MCQ

Test your knowledge with important IC Engine MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more IC Engine MCQs at Bissoy

• If the eccentricity is decreased, the supporting pressure must ____________
  ক

  increase

  খ

  decrease

  গ

  remains same

  ঘ

  none of the mentioned
• An increase in supporting pressure will ____________ the oil film thickness, and decreases the eccentricity.
  ক

  increases

  খ

  decreases

  গ

  remains same

  ঘ

  none of the mentioned
• ____________ is the speed of journal, more will be the oil pulled into the apex of the wedge of oil in the clearances space.
  ক

  Lower

  খ

  Higher

  গ

  Constant

  ঘ

  None of the mentioned
• A slippery bearing material is not desirable during starting and stopping, but once the oil film is established the bearing material is less important.
  ক

  True

  খ

  False
• The objective of lubrication is to reduce dirt and girt that might have crept between the rubbing parts.
  ক

  True

  খ

  False
• The objective of lubrication is to absorb shocks between bearings and other parts and consequently reduce noise.
  ক

  True

  খ

  False
• The objective of lubrication is to cool the surfaces by carrying away heat generated due to friction.
  ক

  True

  খ

  False
• The objective of lubrication is to reduce the wear of the moving parts.
  ক

  True

  খ

  False
• The objective of lubrication is to reduce friction between the parts having relative motion.
  ক

  True

  খ

  False
• Lubrication is the admittance of oil between two surfaces having relative motion.
  ক

  True

  খ

  False
• Calculate the diameter of the circular end of the rocker, when d=15mm?
  ক

  40mm

  খ

  30mm

  গ

  45mm

  ঘ

  7.5mm
• In the cross-section of the rocker arm, the bending moment is maximum at what point?
  ক

  Centre of the pivot

  খ

  Centre of gravity

  গ

  Centre of mass

  ঘ

  Centre of mass and pivot
• The maximum force exerted by the valve will determine which force on the rocker arm?
  ক

  Torsional moment

  খ

  Tangential moment

  গ

  Bending moment

  ঘ

  Both torsional and tangential moment
• The force on which valve is less compared to others?
  ক

  Non-return

  খ

  Inlet

  গ

  Ports

  ঘ

  Exhaust
• In a four-stroke engine, which valve is heavily loaded?
  ক

  Exhaust

  খ

  Inlet

  গ

  Non-return

  ঘ

  One way
• Which of the mentioned below is not the material of rocker arm?
  ক

  Grey-cast iron

  খ

  Malleable cast iron

  গ

  Chromium alloy

  ঘ

  Cast steel
• To reduce the weight and inertia force of the rocker arm, which cross-section is used?
  ক

  V-section

  খ

  L-section

  গ

  I-section

  ঘ

  T-section
• What is the basic function of the rocker arm, concerning the motion of the cam and follower?
  ক

  Only opening inlet and exhaust valve

  খ

  Open and close the inlet and exhaust ports

  গ

  Only closing inlet and exhaust valve

  ঘ

  Open or close the inlet or exhaust valve
• By which process valves are strengthened?
  ক

  Heat-treated

  খ

  Both heat treated and surface hardening

  গ

  Surface hardening

  ঘ

  Quenching
• Which material is used Exhaust valves?
  ক

  Hardened steel

  খ

  Silicon-Chromium steel

  গ

  Nickel-Chromium steel

  ঘ

  Chromium-vanadium steel
• Which material is used in the Inlet valves?
  ক

  Chromium-vanadium steel

  খ

  Nickel-Chromium steel

  গ

  Silicon-Chromium steel

  ঘ

  Hardened steel
• In heavy-duty engines, which material is used in the valves?
  ক

  Silicon-Chromium steel

  খ

  Nickel-Chromium steel

  গ

  Chromium-vanadium steel

  ঘ

  Hardened steel
• What is the small space between the head and the face is known as?
  ক

  Blank

  খ

  Space

  গ

  Stem

  ঘ

  Margin
• What is the small conical surface of the valve results in which property?
  ক

  Self-centering

  খ

  Increase in weight

  গ

  Hardness

  ঘ

  Strength
• What is the face angle range for a poppet valve?
  ক

  20° to 50°

  খ

  35° to 60°

  গ

  30° to 45°

  ঘ

  40° to 55°
• Which part of the valve is a conical surface that comes in contact with a valve seat?
  ক

  Head

  খ

  Face

  গ

  Stem

  ঘ

  shank
• What is the poppet valve head at the end of a rod is known as?
  ক

  Stem

  খ

  Face

  গ

  Head

  ঘ

  Shank
• What does the poppet valve consisting of a disk known as?
  ক

  Face

  খ

  Stem

  গ

  Head

  ঘ

  Shank
• What are the mushroom valves also known as?
  ক

  Tapper valve

  খ

  Sleeve valve

  গ

  Poppet valve

  ঘ

  Non-return valve
• Which are the two types of valves?
  ক

  Sleeve and tapper valve

  খ

  Mushroom and ball valve

  গ

  Tapper and ball valve

  ঘ

  Mushroom and sleeve valves