Millwright TEST #3 QUESTIONS AND
ANSWERS
TIR - Answer- Total Indicator Reading
Positive Displacment vs. Centrifugal Pump - Answer- Capacity is constant reguardless
of pressure
Flow does not decrease with increasing viscosity
Centrifugal Pump - Answer- Capacity decrease with increase in pressure
Flow rate decrease with viscosity
2 categories of postive displacment pumps - Answer- Reciprocals and Rotary
2 types of pistons - Answer- Single action and Double action
Similar to piston - Answer- pumping element iscylindrical solid move back and forth in a
cylindrical chamber.
Difference to piston - Answer- plunger moves into and withdrawls from the cylindrical
chamber.
Diaphragm Pump 3 types of operations - Answer- Mechanical linkage, compressed air,
and fluid from a pulsating, external force.
4 types of rotary Pumps - Answer- External, Internal, Vane, Lobe
External Gear pump ADVANTAGE - Answer- High speed and pressure
External Gear pump Applications - Answer- Chemical and polymer metering, industrial
and hydraulic application.
Internal Gear pump Advantage - Answer- High viscosity liquids
Operates well either direction
Internal Gear pump Applications - Answer- Asphalt, Bitumen, Tar
Food products such as corn syrup, chocolate.
