A. reduce weight
B. conduct heat efficiently
C. reduce possibility of scoring
D. reduce friction
E. increase lubrication effect
Related Mcqs:
- Engine pistons ‘are usually made of aluminium alloy because it_________________?
A. is lighter
B. wears less
C. absorbs shocks
D. is stronger
E. does not react with fuel and lub oil - In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to________________?
A. sin 9
B. sin 9
C. cas 9
D. cos 9
E. tan 9 - Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________?
A. bismuth
B. copper
C. aluminium
D. nickel
E. iron - Pig iron is the name given to________________?
A. raw material for blast furnace
B. product of blast furnace made by reduction of iron ore
C. iron containing huge quantities of carbon
D. iron in molten form in the ladles
E. iron scrap - Carburretion is done to________________?
A. feed petrol into cylinder
B. govern the engine
C. break up and mix the petrol with air
D. heat up the charge to cylinder
E. scavenge the cylinder - The reason for supercharging in any engine is to________________?
A. increase efficiency
B. increase power
C. reduce weight and bulk for a given out-put
D. effect fuel economy
E. none of the above - Which is false statement about annealing. Annealing is done to________________?
A. relieve stresses
B. harden steel slightly
C. improve machining characteristic
D. soften material
E. permit further cold working - Large forgings, crank shafts, axles normally contain carbon up to________________?
A. 0.05 to 0.20%
B. 0.20 to 0.45%
C. 0.45 to 0.55%
D. 0.55 to 1.0%
E. 1.0 to 1.2%. - The function of injector used in small steam plants is to________________?
A. create vacuum in furnace
B. create vacuum at turbine exhaust
C. pump feed water
D. dose chemicals in feed water
E. control steam temperature by injecting water - Piston rings are usually made of___________________?
A. cast iron
B. aluminium
C. phosphor bronze
D. babbitt
E. carbon steel
