The most popular firing order in case of four cylinder in-line I.C. engine is__________________?
(A) 1-2-3-4
(B) 1-3-2-4
(C) 1-4-2-3
(D) 1-2-4-3
(D) 1-3-4-
Freezing temperature of petrol is usually__________________?
(A) 0°C
(B) – 10°C
(C) 10°C
(D) less than – 30°C
(D) less than – 273°C
Ignition quality of diesel-fuel oil is expressed by an index called__________________?
(A) octane number
(B) cetane number
(C) calorific value
(D) carbon content
(D) ignition temperature
The ignition of charge by some hot surface in the engine cylinder before operation of spark plug is known as________________?
(A) auto ignition
(B) preignition
(C) retarded ignition
(D) accelerated ignition
(D) detonation
According to Recardo’s theory, detonation occurs due to______________________?
(A) instantaneous auto-ignition of last part of charge to be burnt
(B) improper mixing of air and fuel
(C) improper combustion
(D) self ignition temperature has nothing to do with detonation
(D) none of the above
The knocking in diesel engines for given fuel, will be__________________?
(A) enhanced by increasing compression ratio
(B) enhanced by decreasing compression ratio
(C) unaflected by compression ratio
(D) first enhanced by increasig compression ratio upto a limit beyond which it will be suppressed
(D) dependent on other factors
Pick up the wrong statement about supercharging __________________?
(A) supercharging reduces knocking in diesel engines
(B) there can be limited supercharging in petrol engines because of detonation
(C) supercharging at high altitudes is essential
(D) supercharging results in fuel economy
(D) supercharging is essential in aircraft engines
Pick up the correct statement from the following?
(A) programmer evaluation and review technique is event oriented
(B) programmer evaluation and review technique is not event oriented
(C) critical path method is event oriented
(D) critical.path method is not activity oriented
(D) none of the above