For low speed operation or for idling in petrol engines, the engine requirements are for_______________?
(A) lean mixture
(B) theoretically correct mixture
(C) rich mixture
(D) any type of mixture
(D) lean/rich mixture depending upon capacity of engine
Power impulses from an I.C. engine are somoothed out by__________________?
(A) governor
(B) crank shaft
(C) gear box
(D) flywheel
(D) timing spark properly
In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?
(A) same level
(B) slightly higher level
(C) slightly lower level
(D) may be anywhere
(D) varies from situation to situation
In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?
(A) 0.85
(B) 1
(C) 1.1 to 1.3
(D) 1.2 to 1.5
In petrol engine, increase of cooling water temperature will_________________?
(A) increase the knocking tendency
(B) decrease the knocking tendecny
(C) not affect the knocking tendency
(D) increase or decrease knocking tendency depedning on strength and time of spark
(D) unpredictable
The pour point of diesel oil must be_________________?
(A) lower than the coldest atmospheric temperature at which oil is to be pumped
(B) higher than above
(C) has no such relation
(D) more than 100°C
(D) none of the above
High carbon content in diesel oil used for diesel engine leads to_________________?
(A) production of highly corrosive gases corroding the cylinder walls and exhaust system
(B) excessive engine wear
(C) damaging of both the storage tank and the engine
(D) deposition on engine parts
(D) none of the above.
Ignition timing of a multicylider petrol engine can be adjusted by_________________?
(A) rotating the crank
(B) adjusting the spark plug gap
(C) adjusting ignition coil position
(D) rotating the distributor
(D) delaying the spark by increasing capacitor in ignition circuit
If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?
(A) give lot of smoke
(B) detonate
(C) knock
(D) not run
(D) run for some time and then stop
For the same size and weight, a two stroke engine as compared to four stroke engine will generate power_________________?
(A) about twice
(B) about 0.5 times
(C) nearly equal
(D) about 1.7 times
(D) about 5 times