WorksheetsHYBN Operators Weekly Test
Total questions: 20
Worksheet time: 17mins
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?
(a)
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
Other than labyrinth seal, what other type of seals are there?
Floating Ring Seal
Dry Gas Seal
Steam Seal
Nitrogen Seal
What is the main adjustment method for a centrifugal compressor?
Amount of pressure supplied
Outlet throttle adjustment
Inlet throttle adjustment
Amount of flowrate
Piston compressor can be classified into 4 types and they are?
(a)
Diagram shown is a piston compressor, what part is #12?
Piston Ring
Crosshead
Piston Rod
Crankshaft
What are the advantages of screw compressor?
Simple structure
Large in size
Few wearing parts
Does not leak
Why is screw compressor unique?
It can compress viscous liquid
It can compress both clean liquid and gas
It can compress liquid and dirty gas
It can compress dirty gas
What is the disadvantage of magnetic pump?
Prone to leakage
Causes cavitation
Low efficiency
Not resistant to high or low temperature
Diagram shows a canned motor pump. What is the name of part #6?
Flange
Hollow Shaft
Bushing
Thermal Relay
What type of pump is this?
Snake Pump
Magnetic Pump
Plunger Metering Pump
Centrifugal Pump
What are the 5 types of pump found in the chemical industries?
(a)
