MD Stationary Engineer Grade 2
Practice Exam With Actual Questions
& Verified Answers ,Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of a boiler safety valve?
A. Regulate steam temperature
B. Maintain feedwater quality
C. Prevent excessive pressure
D. Control combustion air
C
Prevents catastrophic overpressure—if you missed this, start over.
2. A low-water cutoff should trip when:
A. Steam pressure drops
B. Water level becomes unsafe
C. Fuel supply increases
D. Draft decreases
B
Low water = boiler meltdown. It trips to save you from your own
negligence.
3. Blowdown is performed primarily to:
,A. Increase steam pressure
B. Remove sludge and solids
C. Reduce boiler fuel use
D. Increase water level
B
Bottom blow removes sediment that’ll wreck your tubes if you
ignore it.
4. Steam traps are used to:
A. Store condensate
B. Remove air from boiler
C. Discharge condensate, retain steam
D. Increase boiler efficiency
C
They stop live steam loss while dumping condensate—simple.
5. A hydrostatic test checks:
A. Combustion efficiency
B. Pressure-bearing integrity
C. Feedwater purity
D. Blowdown rate
B
You pump it full of water under pressure to catch leaks and
weaknesses.
6. Which device prevents backflow into the potable water system?
A. Check valve
B. Pressure switch
C. Thermostat
D. Steam trap
, A
One-way flow—basic.
7. A boiler furnace draft is typically:
A. Positive
B. Negative
C. Neutral
D. Variable only during shutdown
B
Negative draft pulls combustion gases toward the stack.
8. A deaerator removes:
A. Sediment
B. Oxygen and CO₂
C. Oil
D. Scale
B
Dissolved gases = corrosion. No excuses.
9. Scale in a boiler causes:
A. Higher efficiency
B. Tube overheating
C. Lower stack temperature
D. Longer boiler life
B
Scale insulates tubes—your boiler cooks itself from the inside out.
10. Draft gauges measure:
A. Water hardness
B. Air pressure difference
C. Fuel viscosity
D. CO₂ levels
Practice Exam With Actual Questions
& Verified Answers ,Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of a boiler safety valve?
A. Regulate steam temperature
B. Maintain feedwater quality
C. Prevent excessive pressure
D. Control combustion air
C
Prevents catastrophic overpressure—if you missed this, start over.
2. A low-water cutoff should trip when:
A. Steam pressure drops
B. Water level becomes unsafe
C. Fuel supply increases
D. Draft decreases
B
Low water = boiler meltdown. It trips to save you from your own
negligence.
3. Blowdown is performed primarily to:
,A. Increase steam pressure
B. Remove sludge and solids
C. Reduce boiler fuel use
D. Increase water level
B
Bottom blow removes sediment that’ll wreck your tubes if you
ignore it.
4. Steam traps are used to:
A. Store condensate
B. Remove air from boiler
C. Discharge condensate, retain steam
D. Increase boiler efficiency
C
They stop live steam loss while dumping condensate—simple.
5. A hydrostatic test checks:
A. Combustion efficiency
B. Pressure-bearing integrity
C. Feedwater purity
D. Blowdown rate
B
You pump it full of water under pressure to catch leaks and
weaknesses.
6. Which device prevents backflow into the potable water system?
A. Check valve
B. Pressure switch
C. Thermostat
D. Steam trap
, A
One-way flow—basic.
7. A boiler furnace draft is typically:
A. Positive
B. Negative
C. Neutral
D. Variable only during shutdown
B
Negative draft pulls combustion gases toward the stack.
8. A deaerator removes:
A. Sediment
B. Oxygen and CO₂
C. Oil
D. Scale
B
Dissolved gases = corrosion. No excuses.
9. Scale in a boiler causes:
A. Higher efficiency
B. Tube overheating
C. Lower stack temperature
D. Longer boiler life
B
Scale insulates tubes—your boiler cooks itself from the inside out.
10. Draft gauges measure:
A. Water hardness
B. Air pressure difference
C. Fuel viscosity
D. CO₂ levels
