1. A Michigan Boiler Installer 2B license primarily authorizes work on
which systems?
A. Power boilers only
B. High-pressure steam boilers
C. Low-pressure boilers and heating boilers
D. Nuclear steam generators
ANSWER : C
Explanation:
Class 2B licenses allow installation and repair of low-pressure steam and hot
water heating boilers, not power or high-pressure units.
2. Low-pressure steam boilers operate at pressures not exceeding:
A. 10 psi
B. 15 psi
C. 25 psi
D. 50 psi
ANSWER : B
Explanation:
Per ASME and Michigan rules, low-pressure steam boilers are limited to 15
psi.
3. Hot water heating boilers are limited to a maximum temperature of:
A. 180°F
B. 200°F
C. 212°F
D. 250°F
ANSWER : D
,Explanation:
Low-pressure hot water boilers may operate up to 250°F under code.
4. Which code governs the construction of heating boilers?
A. ASME Section I
B. ASME Section IV
C. ASME Section VIII
D. NFPA 85
ANSWER : B
Explanation:
ASME Section IV applies to heating boilers, both steam and hot water.
5. Which device prevents pressure from exceeding safe limits?
A. Feedwater regulator
B. Pressure gauge
C. Safety relief valve
D. Thermostat
ANSWER : C
Explanation:
The safety relief valve automatically opens to prevent dangerous over-pressure.
6. How often must safety valves be tested?
A. Daily
B. Monthly
C. Annually
D. Every 5 years
ANSWER : C
Explanation:
Michigan boiler rules require annual testing of safety relief valves.
7. What is the minimum number of safety valves required on a heating
boiler?
,A. One
B. Two
C. Three
D. Based on size only
ANSWER : A
Explanation:
At least one approved safety valve is required for each boiler.
8. The function of a low-water cutoff is to:
A. Increase boiler efficiency
B. Prevent dry-firing
C. Control fuel input
D. Maintain water chemistry
ANSWER : B
Explanation:
A low-water cutoff shuts down the burner when water level is unsafe.
9. A boiler operating above its MAWP is:
A. Normal operation
B. Acceptable temporarily
C. Unsafe and illegal
D. Only a concern during startup
ANSWER : C
Explanation:
Operating above Maximum Allowable Working Pressure is dangerous and
prohibited.
10. Expansion tanks are used to:
A. Store makeup water
B. Increase pressure
C. Absorb water expansion
D. Improve combustion
, ANSWER : C
Explanation:
Water expands when heated; expansion tanks prevent pressure damage.
11. What is the purpose of a pressure reducing valve?
A. Reduce steam temperature
B. Maintain system pressure
C. Remove air from system
D. Increase flow rate
ANSWER : B
Explanation:
PRVs regulate incoming water pressure to safe operating levels.
12. Which instrument shows boiler pressure?
A. Thermometer
B. Sight glass
C. Pressure gauge
D. Manometer only
ANSWER : C
Explanation:
A pressure gauge provides continuous pressure indication.
13. Sight glasses are used on steam boilers to indicate:
A. Steam temperature
B. Water level
C. Fuel flow
D. Pressure changes
ANSWER : B
Explanation:
Sight glasses allow operators to visually confirm safe water levels.
which systems?
A. Power boilers only
B. High-pressure steam boilers
C. Low-pressure boilers and heating boilers
D. Nuclear steam generators
ANSWER : C
Explanation:
Class 2B licenses allow installation and repair of low-pressure steam and hot
water heating boilers, not power or high-pressure units.
2. Low-pressure steam boilers operate at pressures not exceeding:
A. 10 psi
B. 15 psi
C. 25 psi
D. 50 psi
ANSWER : B
Explanation:
Per ASME and Michigan rules, low-pressure steam boilers are limited to 15
psi.
3. Hot water heating boilers are limited to a maximum temperature of:
A. 180°F
B. 200°F
C. 212°F
D. 250°F
ANSWER : D
,Explanation:
Low-pressure hot water boilers may operate up to 250°F under code.
4. Which code governs the construction of heating boilers?
A. ASME Section I
B. ASME Section IV
C. ASME Section VIII
D. NFPA 85
ANSWER : B
Explanation:
ASME Section IV applies to heating boilers, both steam and hot water.
5. Which device prevents pressure from exceeding safe limits?
A. Feedwater regulator
B. Pressure gauge
C. Safety relief valve
D. Thermostat
ANSWER : C
Explanation:
The safety relief valve automatically opens to prevent dangerous over-pressure.
6. How often must safety valves be tested?
A. Daily
B. Monthly
C. Annually
D. Every 5 years
ANSWER : C
Explanation:
Michigan boiler rules require annual testing of safety relief valves.
7. What is the minimum number of safety valves required on a heating
boiler?
,A. One
B. Two
C. Three
D. Based on size only
ANSWER : A
Explanation:
At least one approved safety valve is required for each boiler.
8. The function of a low-water cutoff is to:
A. Increase boiler efficiency
B. Prevent dry-firing
C. Control fuel input
D. Maintain water chemistry
ANSWER : B
Explanation:
A low-water cutoff shuts down the burner when water level is unsafe.
9. A boiler operating above its MAWP is:
A. Normal operation
B. Acceptable temporarily
C. Unsafe and illegal
D. Only a concern during startup
ANSWER : C
Explanation:
Operating above Maximum Allowable Working Pressure is dangerous and
prohibited.
10. Expansion tanks are used to:
A. Store makeup water
B. Increase pressure
C. Absorb water expansion
D. Improve combustion
, ANSWER : C
Explanation:
Water expands when heated; expansion tanks prevent pressure damage.
11. What is the purpose of a pressure reducing valve?
A. Reduce steam temperature
B. Maintain system pressure
C. Remove air from system
D. Increase flow rate
ANSWER : B
Explanation:
PRVs regulate incoming water pressure to safe operating levels.
12. Which instrument shows boiler pressure?
A. Thermometer
B. Sight glass
C. Pressure gauge
D. Manometer only
ANSWER : C
Explanation:
A pressure gauge provides continuous pressure indication.
13. Sight glasses are used on steam boilers to indicate:
A. Steam temperature
B. Water level
C. Fuel flow
D. Pressure changes
ANSWER : B
Explanation:
Sight glasses allow operators to visually confirm safe water levels.
