150Q ABSA 4B Practice Test 2 – Complete Power
Engineering Exam Prep & Answer Guide 2026
To check the pilot flame system on an automatically fired boiler:
A)
Remove and cover scanner during pilot operation
B)
Observe pilot during purge period
C)
Close fuel valves prior to start up
D)
Close fuel valves while boiler is operating
E)
Simulate a low water condition - correct answers -Close fuel valves prior to start up
A high gas pressure fuel cut-off switch:
A)
Is never a manual reset device
B)
1
,Is a normally open switch
C)
Closes when gas pressure is too high
D)
Opens when gas pressure is too high
E)
Must be located upstream of an automatic fuel valve - correct answers -Opens when gas pressure is too
high
If a safety valve is too small then the boiler pressure will
A)
remain at the MAWP
B)
rise more than 6% above the MAWP
C)
not rise more than 15% above the MAWP
D)
rise 5% above the maximum allowable working pressure (MAWP)
E)
rise to 6% above the MAWP - correct answers -rise more than 6% above the MAWP
2
, During warm up of a cold hot water boiler excessive pressure build up is prevented by:
A)
An expansion tank
B)
Opening the boiler outlet valve
C)
A very slow warm up
D)
A pressure relief valve
E)
Venting the system - correct answers -An expansion tank
A high water level in a boiler
A)
is usually the result of a boiler feedpump malfunction
B)
should cause a high water level shutdown switch to stop the fire
C)
3
Engineering Exam Prep & Answer Guide 2026
To check the pilot flame system on an automatically fired boiler:
A)
Remove and cover scanner during pilot operation
B)
Observe pilot during purge period
C)
Close fuel valves prior to start up
D)
Close fuel valves while boiler is operating
E)
Simulate a low water condition - correct answers -Close fuel valves prior to start up
A high gas pressure fuel cut-off switch:
A)
Is never a manual reset device
B)
1
,Is a normally open switch
C)
Closes when gas pressure is too high
D)
Opens when gas pressure is too high
E)
Must be located upstream of an automatic fuel valve - correct answers -Opens when gas pressure is too
high
If a safety valve is too small then the boiler pressure will
A)
remain at the MAWP
B)
rise more than 6% above the MAWP
C)
not rise more than 15% above the MAWP
D)
rise 5% above the maximum allowable working pressure (MAWP)
E)
rise to 6% above the MAWP - correct answers -rise more than 6% above the MAWP
2
, During warm up of a cold hot water boiler excessive pressure build up is prevented by:
A)
An expansion tank
B)
Opening the boiler outlet valve
C)
A very slow warm up
D)
A pressure relief valve
E)
Venting the system - correct answers -An expansion tank
A high water level in a boiler
A)
is usually the result of a boiler feedpump malfunction
B)
should cause a high water level shutdown switch to stop the fire
C)
3
