HYBN Operators Weekly Test

What are the advantages of centrifugal pump?

• narrow range of performance

• uniform flow

• complex structure

• easy to maintain

• reliable operation

The main performance parameters of a centrifugal pumps are?

Diagram shows a centrifugal pump. What is no.8 and no. 11?

• 8 - Pump Inlet Valve

  11-

• 8 - Pump Inlet Valve

  11 - Flowmeter

• 8- Pump Outlet Valve

  11-

• 8 - Pump Outlet Valve

  11 - Flowmeter

What type of impeller is this?

• semi-open impeller

• open impeller

• vortex impeller

• single suction impeller

What is the purpose of a sealing ring?

• prevent liquid from flowing out of the pump

• transmit torque

• prevent internal and external leakage of pump

• remove frictional heat and prevent build up of impurities

What is the accuracy that should not be exceeded in a metering pump?

• Less than 0.1%

• Less than 1%

• Less than 2%

• Less than 5%

Diagram shows a vacuum ring liquid pump. What is 4?

• Gas Inlet port

• Gas Outlet port

• Impeller

• Water Ring

Screw pump axial's position can be divided into two. What are they?

• Diagonal & Horizontal

• Diagonal & Vertical

• Vertical & Horizontal

What are the types of speed-type compressors?

• centrifugal

• mixed-flow

• reciprocating

• rotary

In this diagram, what type of seal is used in the centrifugal compressor?

• Labybrinth Seal

• Smooth-type labybrinth Seal

• Zig-zag type Labybrinth Seal

• Step-type Labybrinth Seal