Mechanical Engineering - IC Engines and Nuclear Power Plants

36.
Detonation is harmful due to
increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine
excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls
high intensity of knock causes crankshaft vibration and the engine runs rough
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S - Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

38.
A power plant giving least running cost of production of electrical power is
steam power plant
gas turbine power plant
hydro electric power plant
nuclear power plant
Answer: Option
Explanation:
No answer description is available. Let's discuss.

39.
The thermal efficiency of petrol and gas engines is about
15%
30%
50%
70%
Answer: Option
Explanation:
No answer description is available. Let's discuss.

40.
The firing order in an I.C. engine depends upon
arrangement of the cylinders
design of crankshaft
number of cylinders
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.