WorksheetsFuel air exhaust lv2.2
Total questions: 10
Worksheet time: 5mins
What is the chemically correct air to fuel ratio for complete combustion?
10:1
14.7:1
20:1
25:1
Diesel engine speed is controlled by:
the amount of air entering the engine
the amount of fuel entering the engine
a bucket system
a butterfly valve
Typical fuel injection delivery pressure for a petrol engine is:
1 bar
2 bar
3 bar
5 bar
In a four-cylinder wasted spark ignition system, a spark occurs:
once every cylinder cycle
twice every cylinder cycle
four times every cylinder cycle
twice in the manifold chamber
Diesel is injected into:
the manifold just after the throttle body
the manifold just before the valve port
the combustion chamber
next to the spark plug, pointing towards the valve
Spark plugs with a long insulator nose:
need small plug gaps
need standard plug gaps
need large plug gaps
are used in diesel engines only
With sequential fuel injection:
all injectors pulse simultaneously
all injectors pulse in the correct firing order
all injectors pulse at the same time
injectors pulse as part of the intake stroke
Which of the following is a symptom caused by a blocked fuel injector?
high fuel consumption
poor performance
increased fuel economy
none of the above
A multi-point fuel injection system has:
an injector in place of each carburettor
an injector in place of the throttle body
an injector in each cylinder
an injector in the manifold just after the throttle body
With single-point fuel injection, the fuel is injected:
in the manifold just after the throttle body
in the manifold just before the valve port
in the combustion chamber
next to the spark plug, pointing towards the valve
