250+ TOP MCQs on Gasoline Injection and Answers

IC Engines Multiple Choice Questions on “Gasoline Injection”.

1. Multi-point fuel injection system uses ____________
a) manifold injection
b) direct injection
c) port injection and throttle body injection
d) none of the mentioned
Answer: c
Clarification: Multi-point fuel injection system uses port injection and throttle body injection.

2. L-MPFI system uses ___________
a) port injection
b) direct injection
c) manifold injection
d) throttle body injection
Answer: a
Clarification: L-MPFI system uses port injection while multi-point fuel injection system uses port injection and throttle body injection while D-MPFI system uses direct injection.

3. D-MPFI system uses ___________
a) port injection
b) direct injection
c) manifold injection
d) throttle body injection
Answer: b
Clarification: D-MPFI system uses direct injection and L-MPFI system uses port injection while multi-point fuel injection system uses port injection and throttle body injection.

4. Common rail injection system uses injection pressures of the order ___________
a) 100-200 bar
b) 200-400 bar
c) 400-600 bar
d) 1500 bar
Answer: d
Clarification: Generally, the common rail injection system uses injection pressures of the order 1500 bar.

5. Continuous injection system usually has ___________
a) plunger pump
b) rotary pump
c) gear pump
d) vane pump
Answer: b
Clarification: In common use continuous injection system usually has rotary pump.

6. What is the cold start injector?
a) maintains stoichiometric air-fuel ratio
b) provides lean air-fuel ratio
c) it gives rich air-fuel ratio
d) none of the mentioned
Answer: c
Clarification: Generally, the cold start injector gives rich air-fuel ratio.

7. ECU is an electronic injection system used for ___________
a) calculating the appropriate injection timing
b) meeting only certain operating conditions
c) closing the injection valve only
d) none of the mentioned
Answer: a
Clarification: For calculating the appropriate injection timing, an electronic injection system called ECU is used.

8. With EFI of diesel engines ___________
a) sharp start and stop is not possible
b) very high injection pressure can be obtained
c) sudden cylinder cut-off is impossible
d) diagnostic properties are poor
Answer: b
Clarification: Generally, with EFI of diesel engines very high injection pressure can be obtained.

9. EFI system can achieve ___________
a) proper injection timing
b) proper injection quantity
c) proper injection pressure
d) all of the mentioned
Answer: d
Clarification: EFI system can achieve:
i) proper injection timing
ii) proper injection quantity
iii) proper injection pressure.

10. Gasoline engines are _____________ than diesel engines.
a) heavier
b) lighter
c) unpredictable
d) none of the mentioned
Answer: a
Clarification: In comparison to diesel engine, gasoline engines are heavier.