Q.1
By adjusting which of the following we can vary the opening fuel line pressure?
  • a) Spring
  • b) Rocker arms
  • c) Rotor
  • d) Motor
Q.2
For what purpose a small quantity of fuel is purposely allowed to mean between the nozzle valve and its guide?
  • a) To control the temperature
  • b) To control the pressure
  • c) To lubricate
  • d) To keep a check-in entropy
Q.3
In which type of combustion chamber hole-type nozzle are preferred?
  • a) Pre-combustion
  • b) Open type
  • c) Both pre-combustion and self-cleaning
  • d) Self-cleaning
Q.4
What is the opening pressure range in MPa of a hole-type nozzle?
  • a) 5-7
  • b) 10-17
  • c) 17-34
  • d) 37-54
Q.5
Which of the following is not a property of a good fuel injector?
  • a) Good atomization
  • b) Fuel uniformity
  • c) Faulty spraying
  • d) Proper injection angle
Q.6
What is the shape of the lower pintle end in a throttling pintle type?
  • a) Rectangle
  • b) Truncated cone
  • c) Sphere
  • d) Circle
Q.7
What is the operating pressure in MPa of a pintle type nozzle?
  • a) 3-5
  • b) 5-7
  • c) 7-15
  • d) 17-25
Q.8
In which type of combustion chamber pintle type nozzle injectors are preferred?
  • a) Pre – combustion
  • b) Open type
  • c) Self-cleaning
  • d) Both open type and self-cleaning
Q.9
What is the hole angle degree in an upward direction in a multi-hole nozzle?
  • a) 10
  • b) 15
  • c) 17
  • d) 20
Q.10
Which among the following is not a part of the injector?
  • a) Nozzle
  • b) Nozzle holder
  • c) Spark plug
  • d) Adjusting screw
Q.11
Which among the following is an advantage of the pintle type nozzle?
  • a) Self-cleaning
  • b) Uneven atomization
  • c) Different injection angle
  • d) Fault spraying
Q.12
How much is the angle of spray cone in a single hole nozzle?
  • a) 10
  • b) 20
  • c) 15
  • d) 17
Q.13
What is the use of the additional hole present in a pintaux nozzle?
  • a) For self-cleaning
  • b) High-pressure relief
  • c) It injects a small amount of fuel
  • d) For temperature control
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