Power Engineering ABSA 4B (Panglobal 4th Class ABSA study set) Questions With 100% Correct Answers.
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Power Engineering ABSA 4B (Panglobal 4th Class ABSA study set) Questions With 100% Correct Answers.
After a bearing has been removed for cleaning, it should be soaked for a period of _____ hours in clean solvent.
A) 12 to 16
B) 12 to 14
C) 14 to 16
D) 10 to 12
E) 15 to 16
A
If an oil'...
Power Engineering ABSA 4B (Panglobal 4th Class
ABSA study set) Questions With 100% Correct
Answers.
After a bearing has been removed for cleaning, it should be soaked for a period of _____ hours in
clean solvent.
A) 12 to 16
B) 12 to 14
C) 14 to 16
D) 10 to 12
E) 15 to 16
A
If an oil's viscosity changes a great deal with little temperature change, it will then have a:
A) High pour point
B) High carbon residue
C) High viscosity index
D) Low pour point
E) Low viscosity index
E
Oil additives:
A) Never lose their effect during use of the oil
B) Are not a component of most lubrication oil
C) Should be used as little as possible
D) Should not affect all other characteristics greatly
E) Will always affect the pour point greatly
D
In a bearing, the lubricant reduces the heat produced by:
A) Shock absorption
B) Wear reduction
C) Proper sealing
D) Friction reduction
E) Corrosion reduction
D
The kind of grease used for heavily loaded machinery operating at slow speeds is the:
A) Mixed base grease
B) Sodium base grease
C) Calcium base grease
D) Acid base grease
E) Specialty grease
E
A multi-stage pump would be used when:
A) A greater volume must be pumped
B) The lift is great
C) The head is great
,D) The temperature of the liquid is high
E) There is sufficient floor space
C
The name given to pumps that use gear teeth, vanes, lobes, or screws to move the fluid being
pumped is the _____ type.
A) Reciprocating
B) Rotary
C) Axial flow
D) Dynamic
E) Radial flow
B
New pump packing should be installed:
A) Every time prior to start up
B) Tight enough to stop leakage
C) Every shut down
D) Every year
E) Loose enough to allow leakage for lubrication
E
It is generally accurate to say that:
A) 9.8 kPa pressure results from every metre of water depth or height
B) 10.21 kPa will result from 1 metre of static water head
C) Atmospheric pressure has no bearing on static water head
D) A water height or depth of 10.34 m results in 1 kPa
E) 1 kPa will result from a water head of 9.8 m
A
The liquid to a lantern ring:
A) Should not enter the pump
B) Keeps the air out of the pump
C) Should always come from the same pump
D) Should be warm at all times
E) Keeps grease from leaking out
B
The purpose of "wear rings" in centrifugal pumps is to:
A) Eliminate the need for a relief valve
B) Prevent wear at the pump discharge
C) Prevent wear on the pump inlet
D) Increase the efficiency
E) Lower the pump pressure
D
What kind of principal driver is most commonly used to drive all sizes of compressors?
A) Gas turbine
B) Internal combustion engine
C) Hydraulic motor
D) Steam turbine
E) Electric motor
, E
The valves on a reciprocating compressor are opened by:
A) Hydraulic pressure
B) The eccentric
C) A pressure difference
D) A timing gear
E) The camshaft
C
What kind of shaft seal would be most appropriate to use where some leakage is acceptable?
A) Carbon rings
B) Mechanical
C) Dry gas
D) Liquid Film
E) Labyrinth
E
Air receivers must have a:
A) Thermometer
B) Gauge glass
C) Pressure relief valve
D) High water alarm
E) High pressure alarm
C
An air compressor that gives two compression strokes per crankshaft revolution is:
A) Multistage two cylinder
B) Multi-cylinder single acting
C) A compound unit
D) Single acting
E) Single cylinder double acting
E
The vertical distance from the liquid surface up to the pump center line plus the vertical distance from
the pump center line up to the surface of the liquid in the discharge tank is:
A) Total static head
B) Static suction head
C) Static discharge head
D) Suction lift
E) Total discharge head
A
To reduce air temperature between stages, we would use:
A) an intercooler
B) an aftercooler
C) a receiver
D) a chiller
E) a dryer
A
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