MARYLAND STATIONARY ENGINEER GRADE 5 EXAM /LATEST
MARYLAND STATIONARY ENGINEER GRADE 5 ACTUAL EXAM
2026/2027& PRACTICE QUESTIONS COMPLETE ACCURATE EXAM
APPROVED QUESTIONS WITH WELL ELABORATED ANSWERS WITH
RATIONALES (100% CORRECT VERIFIED SOLUTIONS) LATEST
UPDATED VERSION 2026 EDITION |GUARANTEED SUCCESS A+ |JUST
RELEASED
1. A Grade 5 stationary engineer in Maryland may operate boilers with a maximum
horsepower not exceeding:
A) 10 hp
B) 50 hp – CORRECT ANSWER – Grade 5 is an entry-level license for boilers up
to 50 hp high-pressure or low-pressure unlimited but with limitations.
C) 100 hp
D) 200 hp
2. The minimum temperature of feedwater entering a boiler to prevent thermal
shock is approximately:
A) 32°F
B) 140°F–160°F – CORRECT ANSWER – Cold water causes rapid thermal
contraction of metal, leading to stress cracking.
C) 212°F
D) 300°F
3. A boiler’s safety valve should be tested manually (try lever test) at a pressure of
at least:
A) 0 psig
B) 75% of set pressure – CORRECT ANSWER – Ensures sufficient back pressure
to prevent damage to valve seats during manual lift.
,C) 50% of set pressure
D) 100% of set pressure
4. The primary purpose of a boiler’s water column is to:
A) Store extra water
B) Reduce water turbulence for accurate level reading – CORRECT ANSWER –
Provides a stilling chamber so gauge glass reflects true drum level.
C) Add chemicals
D) Blow down sludge
5. A low water cutoff (LWCO) must be tested:
A) Monthly
B) Each shift or daily – CORRECT ANSWER – Maryland code requires frequent
testing to verify burner shuts off when water level drops.
C) Annually
D) Never
6. The ASME Code requires that every steam boiler have at least:
A) One feedwater pump
B) One safety valve – CORRECT ANSWER – Minimum one safety valve; two
required for larger boilers over 500 sq ft heating surface.
C) Two gauge glasses
D) An economizer
7. A steam pressure gauge must be connected to the boiler’s:
A) Blowdown line
, B) Steam space or water column – CORRECT ANSWER – Measures boiler
pressure accurately.
C) Feedwater line
D) Fuel line
8. When a boiler’s water level is not visible in the gauge glass, the operator should
FIRST:
A) Add water immediately
B) Shut down the boiler and blow down the gauge glass – CORRECT ANSWER –
Determines if glass is blocked or water truly low; never add water without
confirming level.
C) Increase firing rate
D) Open safety valve
9. The maximum allowable working pressure (MAWP) for a low-pressure steam
boiler is:
A) 5 psig
B) 15 psig – CORRECT ANSWER – Low-pressure steam boiler ≤ 15 psig per
ASME and Maryland code.
C) 30 psig
D) 100 psig
10. A boiler’s bottom blowdown valve is used primarily to:
A) Lower steam pressure
B) Remove sludge and sediment from the lowest point – CORRECT ANSWER –
Prevents buildup that could cause overheating or uneven water circulation.
C) Test safety valves
D) Fill the boiler
MARYLAND STATIONARY ENGINEER GRADE 5 ACTUAL EXAM
2026/2027& PRACTICE QUESTIONS COMPLETE ACCURATE EXAM
APPROVED QUESTIONS WITH WELL ELABORATED ANSWERS WITH
RATIONALES (100% CORRECT VERIFIED SOLUTIONS) LATEST
UPDATED VERSION 2026 EDITION |GUARANTEED SUCCESS A+ |JUST
RELEASED
1. A Grade 5 stationary engineer in Maryland may operate boilers with a maximum
horsepower not exceeding:
A) 10 hp
B) 50 hp – CORRECT ANSWER – Grade 5 is an entry-level license for boilers up
to 50 hp high-pressure or low-pressure unlimited but with limitations.
C) 100 hp
D) 200 hp
2. The minimum temperature of feedwater entering a boiler to prevent thermal
shock is approximately:
A) 32°F
B) 140°F–160°F – CORRECT ANSWER – Cold water causes rapid thermal
contraction of metal, leading to stress cracking.
C) 212°F
D) 300°F
3. A boiler’s safety valve should be tested manually (try lever test) at a pressure of
at least:
A) 0 psig
B) 75% of set pressure – CORRECT ANSWER – Ensures sufficient back pressure
to prevent damage to valve seats during manual lift.
,C) 50% of set pressure
D) 100% of set pressure
4. The primary purpose of a boiler’s water column is to:
A) Store extra water
B) Reduce water turbulence for accurate level reading – CORRECT ANSWER –
Provides a stilling chamber so gauge glass reflects true drum level.
C) Add chemicals
D) Blow down sludge
5. A low water cutoff (LWCO) must be tested:
A) Monthly
B) Each shift or daily – CORRECT ANSWER – Maryland code requires frequent
testing to verify burner shuts off when water level drops.
C) Annually
D) Never
6. The ASME Code requires that every steam boiler have at least:
A) One feedwater pump
B) One safety valve – CORRECT ANSWER – Minimum one safety valve; two
required for larger boilers over 500 sq ft heating surface.
C) Two gauge glasses
D) An economizer
7. A steam pressure gauge must be connected to the boiler’s:
A) Blowdown line
, B) Steam space or water column – CORRECT ANSWER – Measures boiler
pressure accurately.
C) Feedwater line
D) Fuel line
8. When a boiler’s water level is not visible in the gauge glass, the operator should
FIRST:
A) Add water immediately
B) Shut down the boiler and blow down the gauge glass – CORRECT ANSWER –
Determines if glass is blocked or water truly low; never add water without
confirming level.
C) Increase firing rate
D) Open safety valve
9. The maximum allowable working pressure (MAWP) for a low-pressure steam
boiler is:
A) 5 psig
B) 15 psig – CORRECT ANSWER – Low-pressure steam boiler ≤ 15 psig per
ASME and Maryland code.
C) 30 psig
D) 100 psig
10. A boiler’s bottom blowdown valve is used primarily to:
A) Lower steam pressure
B) Remove sludge and sediment from the lowest point – CORRECT ANSWER –
Prevents buildup that could cause overheating or uneven water circulation.
C) Test safety valves
D) Fill the boiler
