MASSACHUSETTS STATIONARY ENGINEER
RECERTIFICATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. Feedwater enters a boiler at 212°F. What must occur to
increase steam pressure?
A. Increase water volume
B. Add fuel heat
C. Reduce combustion air
D. Decrease steam load
— B. Add fuel heat
Rationale: Adding heat raises water temperature and
pressure.
2. A boiler’s blowdown is performed primarily to:
A. Control water level
B. Remove dissolved solids
C. Increase steam output
D. Lubricate valves
— B. Remove dissolved solids
Rationale: Blowdown removes impurities to prevent scale.
3. What gauge indicates steam pressure?
A. Thermometer
B. Manometer
C. Pressure gauge
D. Flow meter
, — C. Pressure gauge
Rationale: Pressure gauges show steam pressure.
4. The function of a boiler economizer is to:
A. Burn less fuel
B. Preheat feedwater
C. Clean flue gases
D. Reduce steam velocity
— B. Preheat feedwater
Rationale: Preheating feedwater improves boiler
efficiency.
Heat Transfer and Thermodynamics
6. Conduction transfers heat by:
A. Waves
B. Fluid movement
C. Direct contact
D. Radiation only
— C. Direct contact
Rationale: Conduction is heat movement through touching
particles.
7. Convection heat transfer requires:
A. A vacuum
B. A solid wall
C. Fluid movement
D. Electromagnetic waves
, — C. Fluid movement
Rationale: Convection uses fluid motion to carry heat.
8. Which form of heat is emitted from the sun?
A. Conduction
B. Convection
C. Radiation
D. Advection
— C. Radiation
Rationale: Radiation travels through space.
9. BTU stands for:
A. British Thermal Unit
B. Boiler Transfer Unit
C. Basic Thermal Usage
D. Balanced Temperature Unit
— A. British Thermal Unit
Rationale: BTU measures heat energy.
10. A system at equilibrium has:
A. Increasing energy
B. No net change
C. Rising pressure
D. Zero temperature
— B. No net change
Rationale: Equilibrium means balanced conditions.
HVAC and Refrigeration
RECERTIFICATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. Feedwater enters a boiler at 212°F. What must occur to
increase steam pressure?
A. Increase water volume
B. Add fuel heat
C. Reduce combustion air
D. Decrease steam load
— B. Add fuel heat
Rationale: Adding heat raises water temperature and
pressure.
2. A boiler’s blowdown is performed primarily to:
A. Control water level
B. Remove dissolved solids
C. Increase steam output
D. Lubricate valves
— B. Remove dissolved solids
Rationale: Blowdown removes impurities to prevent scale.
3. What gauge indicates steam pressure?
A. Thermometer
B. Manometer
C. Pressure gauge
D. Flow meter
, — C. Pressure gauge
Rationale: Pressure gauges show steam pressure.
4. The function of a boiler economizer is to:
A. Burn less fuel
B. Preheat feedwater
C. Clean flue gases
D. Reduce steam velocity
— B. Preheat feedwater
Rationale: Preheating feedwater improves boiler
efficiency.
Heat Transfer and Thermodynamics
6. Conduction transfers heat by:
A. Waves
B. Fluid movement
C. Direct contact
D. Radiation only
— C. Direct contact
Rationale: Conduction is heat movement through touching
particles.
7. Convection heat transfer requires:
A. A vacuum
B. A solid wall
C. Fluid movement
D. Electromagnetic waves
, — C. Fluid movement
Rationale: Convection uses fluid motion to carry heat.
8. Which form of heat is emitted from the sun?
A. Conduction
B. Convection
C. Radiation
D. Advection
— C. Radiation
Rationale: Radiation travels through space.
9. BTU stands for:
A. British Thermal Unit
B. Boiler Transfer Unit
C. Basic Thermal Usage
D. Balanced Temperature Unit
— A. British Thermal Unit
Rationale: BTU measures heat energy.
10. A system at equilibrium has:
A. Increasing energy
B. No net change
C. Rising pressure
D. Zero temperature
— B. No net change
Rationale: Equilibrium means balanced conditions.
HVAC and Refrigeration
