Assistant Motor Vehicle Inspector part 5

Subject: AUTOMOBILE ENGINEERING

001. The radiation in the sunlight that gives us the feeling of hotness is

Infra-red.

Infrared radiation has a wavelength from about 1000 nm to 1 mm

002.  The oil pump is driven by the

crankshaft directly

a shaft driven by a crank.

003. The unit of pressure in S.I. units is

pascal

One pascal equals 0.00015 pounds per square inch (PSI) or 0.02 pounds per square foot.

004. According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies

directly as

absolute temperature, if volume is kept constant

006. According to Clausius statement of second law of thermodynamics

heat can’t be transferred from low temperature to high temperature source without the aid of

external energy.

007. By which process is solar energy converted into chemical energy?

Photosynthesis.

  

008. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

high initial and maintenance cost.

009. Which of the following instrument can be used for measuring speed of an aeroplane?

Pitot tube.

010. Bernoulli equation deals with the law of conservation of

energy.

011. The battery is an electrochemical device, which means battery

Uses chemical action to provide electricity.

012. An over-inflated tyre will wear the tread most near the

Centre.

013. Two advantages of using helical gears rather than spur gears in a transmission system are

Noise level and strength.

014. The temperature at which tyre inflation pressure should be checked is

Ambient temperature

016. One effect of detonation is

Loss of power.

017. The effect of vapour locking on the brake performance is that the

Brakes fail completely.

018. Clutch facings are usually attached to the plate by

Brass rivets.

019. When the top of the wheel is tilted outward, then it is called

Positive camber.

020. The purpose of transmission in an automobile is

To vary the torque at the wheels.

021. The lower cylindrical portion of the piston which improves piston cooling performance is

called

Piston skirt.

Piston skirt is a cylindrical part of the piston below the pressure rings.

022. Damper in an automobile is used to

Dissipate the energy.

023. Inertia force acts

opposite to the direction of acceleration.

026. A stud

has both the ends threaded.

027. Mild steel belongs to the following category

low carbon steel.

028. Which of the following constituents of steels is softest and least strong?

ferrite.

029. Gamma iron exits at following temperature

between 910°C and 1400°C.

030. The unique property of cast iron is its high

damping characteristics.