Top 50+ Solved Engine Lubrication ans Cooling MCQ Questions Answer
Q. Mechanical efficiency is the ratio of
a. brake power to heat input
b. indicated power to heat input
c. brake power to indicated power
d. friction loss to heat input
Q. Most commonly used lubrication system in automobiles is the
a. splash system
b. pressure system
c. petrol system
d. gravity system
Q. Friction that occurs between the layers of oil film is called
a. viscous friction
b. greasy friction
c. dry friction
d. boundary friction
Q. Crankcase ventilation, is provided
a. to cool cylinder
b. to cool crankcase
c. to cool piston
d. to remove blow by
Q. the most important property of the lubricant is
a. density
b. viscosity
c. thermal conductivity
d. none of the above
Q. The maximum pressure in the lubrication system is controlled by
a. oil pump
b. oil filter
c. valve relief
d. supply voltage
Q. The lubricants commonly used in the automobiles are
a. animal oils
b. vegetable oils
c. mineral oils
d. cooking oils
Q. Detergents are oil additives used to
a. reduce viscosity
b. increase fire point
c. prevent sludge formation
d. prevent foaming
Q. Oil pressure in the dry sump lubrication system is around
a. 5 bar - 10 bar
b. 11 bar 15 bar
c. 3 bar - 8 bar
d. 1 bar
Q. For mep decreases when using
a. single cylinder engine
b. smaller number of larger cylinders
c. larger number of smaller cylinders
d. none of the above
Q. Blow by losses are
a. directly proportional to the inlet pressure
b. inversely proportional to the inlet pressure
c. proportional to the square root of inlet pressure
d. none of the above
Q. Mist lubrication system is mainly used in
a. four-stroke petrol engine
b. four-stroke diesel engine
c. two-stroke petrol engine
d. Wankle engine
Q. Additives are added in lubricant to have
a. detergent-dispersant characteristics
b. pour point depression
c. antifoam characteristics
d. all of the above
Q. The principal surfaces requiring lubrication in an IC engine are
a. cylinder head
b. crankcase
c. inlet and exhaust manifold
d. none of the above