The object of providing masked inlet valve in the air passage of compression ignition engines is to Induce primary swirl Induce secondary turbulence Control air flow Enhance flow rate TRUE ANSWER : ? YOUR ANSWER : ?
Scavenging is usually done to increase Power output Thermal efficiency Fuel consumption Speed TRUE ANSWER : ? YOUR ANSWER : ?
Stoichiometric ratio is Chemically correct air-fuel ratio by weight Actual air-fuel ratio for maximum efficiency Chemically correct air-fuel ratio by volume None of these TRUE ANSWER : ? YOUR ANSWER : ?
The operation of forcing additional air under pressure into the engine cylinder is known as Turbulence Carburetion Supercharging Delay period TRUE ANSWER : ? YOUR ANSWER : ?
The knock in diesel engine occurs due to Delayed burning of the first part of the charge Instantaneous and rapid burning of the first part of the charge Instantaneous auto ignition of last part of charge Reduction of delay period TRUE ANSWER : ? YOUR ANSWER : ?
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed 80°C 180°C 240°C 120°C TRUE ANSWER : ? YOUR ANSWER : ?
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of Prony brake test Morse test Motoring test Heat balance test TRUE ANSWER : ? YOUR ANSWER : ?
In petrol engines, the delay period is of the order of 0.002 second 0.003 second 0.001 second 0.004 second TRUE ANSWER : ? YOUR ANSWER : ?
The two reference fuels used for cetane rating are Cetane and alpha-methyl naphthalene Cetane and iso-octane Cetane and normal heptane Cetane and tetra ethyl lead TRUE ANSWER : ? YOUR ANSWER : ?
In a four stroke cycle petrol engine, the compression May start and end anywhere Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre Starts at bottom dead centre and ends at top dead centre Starts at 40° after bottom dead centre and ends at 30° before top dead centre TRUE ANSWER : ? YOUR ANSWER : ?