250+ TOP MCQs on Injection Systems and Answers Pdf

IC Engines Multiple Choice Questions on “Injection Systems”.

1. Which of the following methods used on fuel injection?
a) air injection
b) mechanical injection
c) solid fuel injection
d) all of the mentioned

Answer: d
Clarification: The methods used on fuel injection are air injection, mechanical injection and solid fuel injection.

2. Removal of air from the pipeline is termed as ____________ in injection system.
a) bleeding
b) wound
c) sweating
d) none of the mentioned

Answer: a
Clarification: Generally, the removal of air from the pipeline is termed as bleeding in injection system.

3. What are the usual types of diesel injectors?
a) single hole injector
b) multi hole injector
c) long stem injector
d) all of the mentioned

Answer: d
Clarification: The types of diesel injectors are single hole injector, multi hole injector and long stem injector.

4. In pre-chamber and swirl type of combustion system ______________ is used.
a) single hole injector
b) multi hole injector
c) long stem injector
d) pintle nozzle

Answer: d
Clarification: In pre-chamber and swirl type of combustion system pintle nozzle is used and not the other nozzles.

5. _______________ is used to enable cold starting, with out the use of a heater plug.
a) Pintaux nozzle
b) Multi hole injector
c) Long stem injector
d) Pintle nozzle

Answer: a
Clarification: Generally, intaux nozzle is used to enable cold starting, with out the use of a heater plug.

6. If one or more nozzles are not spraying correctly then ________________ occurs.
a) dripping
b) misfiring
c) cold firing
d) none of the mentioned

Answer: b
Clarification: If one or more nozzles are not spraying correctly then misfiring occurs and not cold firing.

7. Solid injection is also called ________________
a) air injection
b) mechanical injection
c) compression fuel injection
d) none of the mentioned

Answer: b
Clarification: Generally, solid injection is also called mechanical injection.

8. Fuel is injected into the cylinder at the end of ______________ stroke.
a) suction
b) compression
c) expansion
d) exhaust

Answer: b
Clarification: Fuel is injected into the cylinder at the end of the compression stroke and not at suction or expansion stroke.

9. The beginning and end of the injection should be sharp.
a) True
b) False

Answer: a

10. In _____________ injection system only one pump is sufficient for multi-cylinder engine.
a) air
b) mechanical
c) compression fuel
d) common rail

Answer: d