LUBRICATION

The most important property of the lubricant is

• density

• viscosity

• thermal conductivity

• none of the above

The maximum pressure in the lubrication system is controlled by

• oil pump

• oil filter

• valve relief

• supply voltage

The lubricants commonly used in the automobiles are

• animal oils

• vegetable oils

• synthetic oils

• cooking oils

Mist lubrication system is mainly used in

• four-stroke petrol engine

• four-stroke diesel engine

• two-stroke petrol engine

• Wankle engine

Most commonly used lubrication system in automobiles is the

• splash system

• pressure system

• petrol system

• gravity system

Semi pressure system is a combination of splash and pressure systems.

• True

• False

____________ is the property of lubricating oil due to which the oil particles stick with the metal surfaces.

• Oiliness

• Pour point

• Adhesiveness

• None of the mentioned

Lubricating oil

• Minimizes wear in moving parts

• Helps in keeping the parts cool

• Washes away and carries away dirt

• All of the above

The lubricant in internal combustion is exposed to

• high temperature

• high pressure

• low temperature

• low pressure

Which one of the following is NOT the property of a good lubricant

• Takes up the surface pressure between sliding parts

• Becomes thicker after prolonged use

• No change in viscosity due to variation in temperature

• Reduces friction between machine parts