Millwright Level 4 Final Study Guide – Red Seal Industrial Mechanic Exam
Preparation
Pumps that generally have close tolerances and pump exact amounts of fluid are called - correct
answer ✔✔Metering pump or Dosing pump
To help eliminate cavitation reduce the _____ of the fluid. - correct answer ✔✔Vapor Pressure
The veins in a vein pump are made from ______ materials. - correct answer ✔✔Soft/non
sparking
The gear pump is the most common type of _____ pump. - correct answer ✔✔Rotary
The most common type of dynamic pump is the __________. - correct answer ✔✔Centrifugal
Having no motion being at a state of rest is ________. - correct answer ✔✔Static
__________ is speed expressed in distance over time. - correct answer ✔✔Velocity
What does NPSHR stand for? - correct answer ✔✔Net Positive Suction Head Required
Explain NPSHR - correct answer ✔✔Is the minimum amount of net positive suction head
required to have the pump run efficiently without cavitating.
What does NPSHA stand for? - correct answer ✔✔Net Positive Suction Head Available
Explain NPSHA - correct answer ✔✔is whatever pressure you have available
, What supports the impeller of a shaft? - correct answer ✔✔Bearings
When you set down indicators or lasers you look for _______? - correct answer ✔✔Pipe strain
________ is a low pressure contact seal used with rotary shafts. - correct answer ✔✔Lip Seal /
Simple oil seal
General purpose O-rings are made with a cross section that is ____ larger than nominal size. -
correct answer ✔✔10%
Magnetic drive pumps use magnets and ______ to seal the fluid inside the pump. - correct
answer ✔✔O-rings
As per your chapter the best pump for pumping liquids with particles in it is? - correct answer
✔✔Lobe pump
Explain Cavitation - correct answer ✔✔Low suction, splashing, bubbles. Formation and collapse
of vapor bubbles inside a liquid due to low pressure
When using a flexitallic gasket what type of finish is required? - correct answer ✔✔RMS 125
What type of seal is used when there is movement between two mating parts? - correct answer
✔✔Dynamic Seal
Oil seals are designed to keep oil in and keep _______ out. - correct answer
✔✔Contamination/Debris
Preparation
Pumps that generally have close tolerances and pump exact amounts of fluid are called - correct
answer ✔✔Metering pump or Dosing pump
To help eliminate cavitation reduce the _____ of the fluid. - correct answer ✔✔Vapor Pressure
The veins in a vein pump are made from ______ materials. - correct answer ✔✔Soft/non
sparking
The gear pump is the most common type of _____ pump. - correct answer ✔✔Rotary
The most common type of dynamic pump is the __________. - correct answer ✔✔Centrifugal
Having no motion being at a state of rest is ________. - correct answer ✔✔Static
__________ is speed expressed in distance over time. - correct answer ✔✔Velocity
What does NPSHR stand for? - correct answer ✔✔Net Positive Suction Head Required
Explain NPSHR - correct answer ✔✔Is the minimum amount of net positive suction head
required to have the pump run efficiently without cavitating.
What does NPSHA stand for? - correct answer ✔✔Net Positive Suction Head Available
Explain NPSHA - correct answer ✔✔is whatever pressure you have available
, What supports the impeller of a shaft? - correct answer ✔✔Bearings
When you set down indicators or lasers you look for _______? - correct answer ✔✔Pipe strain
________ is a low pressure contact seal used with rotary shafts. - correct answer ✔✔Lip Seal /
Simple oil seal
General purpose O-rings are made with a cross section that is ____ larger than nominal size. -
correct answer ✔✔10%
Magnetic drive pumps use magnets and ______ to seal the fluid inside the pump. - correct
answer ✔✔O-rings
As per your chapter the best pump for pumping liquids with particles in it is? - correct answer
✔✔Lobe pump
Explain Cavitation - correct answer ✔✔Low suction, splashing, bubbles. Formation and collapse
of vapor bubbles inside a liquid due to low pressure
When using a flexitallic gasket what type of finish is required? - correct answer ✔✔RMS 125
What type of seal is used when there is movement between two mating parts? - correct answer
✔✔Dynamic Seal
Oil seals are designed to keep oil in and keep _______ out. - correct answer
✔✔Contamination/Debris
