ABSA 4B Practice questions with answers
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In order to protect the driver, a start-stop air compressor should
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
be equipped with:
|\ |\
A) |\
Safety heads |\
B) |\
An intercooler
|\
C) |\
Manual cylinder bleed petcocks
|\ |\ |\
D) |\
Pre-start automatic unloading |\ |\
E) |\
An automatic blowdown system - CORRECT ANSWERS ✔✔D)
|\ |\ |\ |\ |\ |\ |\ |\
Pre-start automatic unloading |\ |\
When the supply is above the pump the total static head of the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pump will be the:
|\ |\ |\
,A) |\
Capacity of the pump |\ |\ |\
B) |\
Difference between the static suction head and the static
|\ |\ |\ |\ |\ |\ |\ |\ |\
discharge head |\
C) |\
Sum of the static suction head and the static discharge head
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
D) |\
Discharge pressure in metre |\ |\ |\
E) |\
Discharge head of the pump - CORRECT ANSWERS ✔✔B)
|\ |\ |\ |\ |\ |\ |\ |\ |\
Difference between the static suction head and the static
|\ |\ |\ |\ |\ |\ |\ |\ |\
discharge head |\
What kind of shaft seal would be most appropriate to use where
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
some leakage is acceptable?
|\ |\ |\
A) |\
,Mechanical
B) |\
Liquid Film |\
C) |\
Dry gas |\
D) |\
Carbon rings |\
E) |\
Labyrinth - CORRECT ANSWERS ✔✔E)
|\ |\ |\ |\ |\
Labyrinth
Sliding vane compressors:
|\ |\
A) |\
Use cylinder valves
|\ |\
B) |\
Are 100% efficient
|\ |\
, C) |\
Are double acting compressors
|\ |\ |\
D) |\
Are positive displacement compressors
|\ |\ |\
E) |\
Fall into the centrifugal compressor category - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔D) |\ |\
Are positive displacement compressors
|\ |\ |\
Each hot water heating boiler shall be equipped with stop valves
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in the supply and return connections to:
|\ |\ |\ |\ |\ |\
A) |\
Drain off the boiler without emptying the system
|\ |\ |\ |\ |\ |\ |\
B) |\
To drain the boiler
|\ |\ |\
C) |\
Prevent over pressure of the boiler
|\ |\ |\ |\ |\
D) |\
|\ |\ |\ |\ |\ |\
In order to protect the driver, a start-stop air compressor should
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
be equipped with:
|\ |\
A) |\
Safety heads |\
B) |\
An intercooler
|\
C) |\
Manual cylinder bleed petcocks
|\ |\ |\
D) |\
Pre-start automatic unloading |\ |\
E) |\
An automatic blowdown system - CORRECT ANSWERS ✔✔D)
|\ |\ |\ |\ |\ |\ |\ |\
Pre-start automatic unloading |\ |\
When the supply is above the pump the total static head of the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pump will be the:
|\ |\ |\
,A) |\
Capacity of the pump |\ |\ |\
B) |\
Difference between the static suction head and the static
|\ |\ |\ |\ |\ |\ |\ |\ |\
discharge head |\
C) |\
Sum of the static suction head and the static discharge head
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
D) |\
Discharge pressure in metre |\ |\ |\
E) |\
Discharge head of the pump - CORRECT ANSWERS ✔✔B)
|\ |\ |\ |\ |\ |\ |\ |\ |\
Difference between the static suction head and the static
|\ |\ |\ |\ |\ |\ |\ |\ |\
discharge head |\
What kind of shaft seal would be most appropriate to use where
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
some leakage is acceptable?
|\ |\ |\
A) |\
,Mechanical
B) |\
Liquid Film |\
C) |\
Dry gas |\
D) |\
Carbon rings |\
E) |\
Labyrinth - CORRECT ANSWERS ✔✔E)
|\ |\ |\ |\ |\
Labyrinth
Sliding vane compressors:
|\ |\
A) |\
Use cylinder valves
|\ |\
B) |\
Are 100% efficient
|\ |\
, C) |\
Are double acting compressors
|\ |\ |\
D) |\
Are positive displacement compressors
|\ |\ |\
E) |\
Fall into the centrifugal compressor category - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔D) |\ |\
Are positive displacement compressors
|\ |\ |\
Each hot water heating boiler shall be equipped with stop valves
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in the supply and return connections to:
|\ |\ |\ |\ |\ |\
A) |\
Drain off the boiler without emptying the system
|\ |\ |\ |\ |\ |\ |\
B) |\
To drain the boiler
|\ |\ |\
C) |\
Prevent over pressure of the boiler
|\ |\ |\ |\ |\
D) |\
