Q. A petrol engine has compression ratio from

View solution

Q. Detonation is harmful due to

View solution

Q. 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)

View solution

Q. A power plant giving least running cost of production of electrical power is

View solution

Q. The thermal efficiency of petrol and gas engines is about

View solution

Q. The firing order in an I.C. engine depends upon

View solution

Q. The cetane number of diesel oil, generally available, is

View solution

Q. The object of providing masked inlet valve in the air passage of compression ignition engines is to

View solution

Q. During suction stroke of a four stroke petrol engine, the inlet valve opens and the charge is sucked into the cylinder as the piston moves upwards from the bottom dead centre.

View solution

Q. The power actually developed by the engine cylinder of an I.C. engine is known as

View solution

Q. A nuclear reactor is said to be critical when the neutron population in the reactor core is

View solution

Q. A long delay period in compression ignition engines gives a more rapid rise in pressure which causes knocking.

View solution

Q. A fission chain reaction in uranium can be developed

View solution

Q. Thermal efficiency of a two stroke cycle engine is __________ a four stroke cycle engine.

View solution

Q. A supercharged engine as compared to an ordinary engine

View solution

Q. Which one of the following engines will have heavier flywheel than the remaining ones?

View solution

Q. In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.

View solution

Q. Materials which make good moderators do not make good reflectors.

View solution

Q. The ignition of the charge by some hot surface within the engine before the passage of spark is called

View solution

Q. Special reactors, called breeder reactors, supply a net gain of fissionable material.

View solution