Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads The friction is high The friction is unpredictable The engine is rarely operated The small difference in cooling water temperature or in internal friction has a disproportionate effect TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine? Inlet valve opening before top dead center Inlet valve closing before bottom dead center Inlet valve closing after bottom dead center Exhaust valve closing after top dead center TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following does not relate to a spark ignition engine? Spark plug Fuel injector Carburettor Ignition coil TRUE ANSWER : ? YOUR ANSWER : ?
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is 286 cm3 252 cm3 248 cm3 264 cm3 TRUE ANSWER : ? YOUR ANSWER : ?
The _________ engines can work on very lean mixture of fuel. None of these Spark ignition Both (A) and (B) Compression ignition TRUE ANSWER : ? YOUR ANSWER : ?
Antiknock for compression ignition engines is Napthene Amyl nitrate Tetra ethyl lead Hexadecane TRUE ANSWER : ? YOUR ANSWER : ?
A 5 BHP engine running at full load would consume diesel of the order of 5 kg/hr 3 kg/hr 1 kg/hr 0.3 kg/hr TRUE ANSWER : ? YOUR ANSWER : ?
The tangential velocity of the water element having a free vortex is Directly proportional to its (distance)2 from the centre Inversely proportional to its distance from the centre Inversely proportional to its (distance)2 from the centre Directly proportional to its distance from the centre TRUE ANSWER : ? YOUR ANSWER : ?
The air-fuel ratio in petrol engines is controlled by Injection Governing Controlling valve opening/closing Carburetion TRUE ANSWER : ? YOUR ANSWER : ?