Properties of Lubrication MCQ

Test your knowledge with important Properties of Lubrication MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Properties of Lubrication MCQs on Bissoy. Bissoy App

• A high viscosity index is always desired for lubricating oils as it can be used in severe winter and summer conditions.
  ক

  True

  খ

  False
• The sludge formation takes place as a result of operation at low engine temperatures during starting, warming up, and idling periods.
  ক

  True

  খ

  False
• ____________ is the measure of density of oil.
  ক

  Specific gravity

  খ

  Film Strength

  গ

  Adhesiveness

  ঘ

  None of the mentioned
• ____________ is the property of a lubricating oil due to which the oil retains a thin film between the two surfaces.
  ক

  Oiliness

  খ

  Film Strength

  গ

  Adhesiveness

  ঘ

  None of the mentioned
• ____________ is the property of lubricating oil due to which the oil particles stick with the metal surfaces.
  ক

  Oiliness

  খ

  Pour point

  গ

  Adhesiveness

  ঘ

  None of the mentioned
• At the lowest temperature there should separation of solids, and at the highest temperature it should not vapourise beyond a certain limit.
  ক

  True

  খ

  False
• A lubricating oil need not be stable physically at the lowest and highest temperatures between which the oil is to be used.
  ক

  True

  খ

  False
• The emulsification number is an index of the tendency of an oil to emulsify with water.
  ক

  True

  খ

  False
• A lubricating oil, when mixed with water is emulsified and loses its lubricating property.
  ক

  True

  খ

  False
• A lubricant should not corrode the working parts and it must retain its properties even in the presence of foreign matter and additives.
  ক

  True

  খ

  False
• ____________ is the property which enables oil to spread over and adhere to the surface of the bearing.
  ক

  Oiliness

  খ

  Pour point

  গ

  Fire point

  ঘ

  None of the mentioned
• ____________ is the lowest temperature at which the lubricating oil will pour.
  ক

  Viscosity

  খ

  Pour point

  গ

  Fire point

  ঘ

  None of the mentioned
• ____________ is the lowest temperature at which the oil burns continuously.
  ক

  Viscosity

  খ

  Flash point

  গ

  Fire point

  ঘ

  None of the mentioned
• The flash point of the oil should be sufficiently high so as to avoid flashing of oil vapours at the temperatures occurring in common use.
  ক

  True

  খ

  False
• Pour point is the lowest temperature at which the lubricating oil will flash when a small flame is passed across its surface.
  ক

  True

  খ

  False
• A high viscosity index indicates relatively ____________ changes in viscosity of the oil with the temperature.
  ক

  larger

  খ

  smaller

  গ

  constant

  ঘ

  none of the mentioned
• The viscosity is measured by ____________
  ক

  barometer

  খ

  thermometer

  গ

  viscosimeter

  ঘ

  none of the mentioned
• Viscosity varies with the temperature and hence if a surface to be lubricated is normally at high temperature it should be supplied with oil of higher viscosity.
  ক

  True

  খ

  False
• A more viscous oil can carry a greater load, but it will offer great friction to sliding movement of the one bearing surface over the other.
  ক

  True

  খ

  False
• ____________ is the ability of the oil to resist internal deformation due to mechanical stresses.
  ক

  Viscosity

  খ

  Flash point

  গ

  Fire point

  ঘ

  None of the mentioned
• Which of the following are the properties of lubricants?
  ক

  viscosity

  খ

  flash point

  গ

  fire point

  ঘ

  all of the mentioned