IC Engines and Nuclear Power Plants Questions

• If the compression ratio in I.C. engine increases, then its thermal efficiency will
• The ignition of the charge by some hot surface within the engine before the passage of spark is called
• A nuclear reactor is said to be critical when the neutron population in the reactor core is
• In diesel engines, the ignition takes place due to the heat produced in the engine cylinder at the end of compression.
• A power plant giving least running cost of production of electrical power is
• The loud pulsating noise heard within the cylinder of an internal combustion engine is known as
• The slowing down of fast neutrons is desirable because slow moving neutrons are more effective than fast neutrons in triggering fission.
• 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)
• A supercharged engine as compared to an ordinary engine
• The fuels in order of decreasing knock tendency for spark ignition engines are
• Thermal efficiency of a two stroke cycle engine is __________ a four stroke cycle engine.
• The object of providing masked inlet valve in the air passage of compression ignition engines is to
• 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.
• A petrol engine has compression ratio from
• The ratio of the indicated thermal efficiency to the air standard efficiency is known as
• The firing order in an I.C. engine depends upon
• The relative efficiency of an I.C. engine is the ratio of the indicated thermal efficiency to the air standard efficiency.
• A diesel engine has inlet valve, fuel injection valve and exhaust valve.
• The air-fuel ratio of the petrol engine is controlled by
• The power actually developed by the engine cylinder of an I.C. engine is known as