CHAPTER 5 IN NORA BOOK QUESTIONS WITH ANSWERS

CHAPTER 5 IN NORA BOOK
QUESTIONS WITH ANSWERS

Follow path of fuel through a fuel nozzle: - correct answer ✔✔ Oil enters through the strainer,
passes between the Outerwall of the insert and the inner wall of the nozzle adapter or body,
then enters the tangential slots, goes through the swirl chamber, and exits through the nozzle
orifice.



3 Functions of the fuel nozzle: - correct answer ✔✔ A) Atomizes the fuel

B) Meters the amount of fuel (GPH)

C) Sets the spray angle and pattern of the fuel



All fuel nozzles are manufactured based on what PSI pump pressure? - correct answer ✔✔ 100
PSI



Most common nozzle spray patterns: - correct answer ✔✔ A) Hollow

B) Semi Solid

C) Solid



Most common nozzle spray angles: - correct answer ✔✔ 30-45-60-70-80-90



Cold oil will cause problems with fuel nozzles: - correct answer ✔✔ As the viscosity of the fuel
entering the nozzle increases, the flow rate of the nozzle increases!



3 ways to combat problems with cold oil: - correct answer ✔✔ A) increase fuel pump pressure
to 140 PSI, and lower the fuel nozzle size

B) Preheat the fuel- (must use an approved nozzle line heater)