The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to Inject fuel in a chamber of high pressure at the end of compression stroke Inject fuel at a high velocity to facilitate atomization Ensure that penetration is not high All of these TRUE ANSWER : ? YOUR ANSWER : ?
The pressure at the end of compression, in petrol engines, is approximately 25 bar 10 bar 20 bar 35 bar TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine? Inlet valve closing before bottom dead center Inlet valve opening before top dead center Exhaust valve closing after top dead center Inlet valve closing after bottom dead center TRUE ANSWER : ? YOUR ANSWER : ?
The advancing of spark timing in spark ignition engines will ___ knocking tendency. None of the listed here Not effect Reduce Increase TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is correct regarding normal cetane? It has long carbon chain structure Its chemical name is normal hexadecane It is a standard fuel used for knock rating of diesel engines All of these TRUE ANSWER : ? YOUR ANSWER : ?
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have All of these Low density Long ignition delay Low temperature TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is false statement?Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following Detonation Formation of hard coating on piston skirts Oil sludge in the engine crank case Piston ring and cylinder wear TRUE ANSWER : ? YOUR ANSWER : ?
Gaseous fuel guarantees are based on Calorific value of oil High heat value of oil Low heat value of oil Mean heat value of oil TRUE ANSWER : ? YOUR ANSWER : ?
In a four stroke cycle petrol engine, the charge is ignited at 30° after bottom dead center 30° before bottom dead center 30° after top dead center 30° before top dead center TRUE ANSWER : ? YOUR ANSWER : ?