1|Page
MA 2ND CLASS FIREMAN’S EXAM AND PRACTICE
EXAM NEWEST 2026 COMPLETE EXAM 400
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED
A+||VERIFIED EXAM!!!
The heating surface of a boiler is the area
a) exposed to the flame and flue gases
b) in contact with steam
c) of the furnace
d) of the burner face in the furnace - ANSWER-a) exposed
to the flame and flue gases
The purpose of a superheater is to
a) heat steam above its saturation temperature
b) boost the steam pressure
c) add heat to the combustion air
d) add heat to the incoming feedwater - ANSWER-a) heat
steam above its saturation temperature
What is the formula for the factor of evaporation?
a) h-H/970.3 Btu
b) H-b/970.3 Btu
c) 970.3 Btu/H-h
,2|Page
d) 970.3 Btu/h-H - ANSWER-b) H-b/970.3 Btu
What can cause a superheater tube to overheat?
a) Not draining before starting
b) Overfiring
c) Poor boiler circulating
d) Dirty tube - ANSWER-d) Dirty tube
A boiler has a steaming capacity of 34,500 lb of steam per
hour. The evaporation rate is 10lb/ft^2 of heating surface
per hour. What is the boiler heating surface?
a) 100
b) 1,000
c) 3,450
d) 6,900 - ANSWER-c) 3,450
How many square feet of heating surface does a 3-inch
fire-tube 20 ft long with a 3/16-inch wall have?
a) 13.7
b) 14.7
c) 15.7
d) 16.7 - ANSWER-13.7
,3|Page
In a high-temperature hot water boiler, what would cause
a tube to overheat?
a) Dirty economizer tubes
b) High economizer feedwater outlet temperature
c) Feedwater temperature too high
d) Poor circulation (plugged tube) - ANSWER-d) Poor
circulation (plugged tube)
A downcomer is
a) located in a fire-tube boiler
b) one of the tubes that supports the furnace
c) used to circulate flue gas
d) found in a water-tube boiler - ANSWER-d) found in a
water-tube boiler
Extreme firebox temperature changes cause
a) spalling
b) lower stack temperatures
c) increased soot deposits
d) a rise in stack temperature - ANSWER-a) spalling
, 4|Page
The low-water cutoff
a) feeds the boiler when it is low on water
b) shuts off the burner when the boiler is low on water
c) dumps the boiler
d) cuts off the water supply when the level is too high -
ANSWER-b) shuts off the burner when the boiler is low on
water
Steam coming from the bottom try cock would indicate
a) normal water level
b) high water level
c) low water level
d) normal steam level - ANSWER-c) low water level
What type of valve has the most resistance to flow?
a) Globe
b) Gate
c) Ball
d) Butterfly - ANSWER-a) Globe
When checking the water level of a boiler,
a) ask the boiler operator
MA 2ND CLASS FIREMAN’S EXAM AND PRACTICE
EXAM NEWEST 2026 COMPLETE EXAM 400
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED
A+||VERIFIED EXAM!!!
The heating surface of a boiler is the area
a) exposed to the flame and flue gases
b) in contact with steam
c) of the furnace
d) of the burner face in the furnace - ANSWER-a) exposed
to the flame and flue gases
The purpose of a superheater is to
a) heat steam above its saturation temperature
b) boost the steam pressure
c) add heat to the combustion air
d) add heat to the incoming feedwater - ANSWER-a) heat
steam above its saturation temperature
What is the formula for the factor of evaporation?
a) h-H/970.3 Btu
b) H-b/970.3 Btu
c) 970.3 Btu/H-h
,2|Page
d) 970.3 Btu/h-H - ANSWER-b) H-b/970.3 Btu
What can cause a superheater tube to overheat?
a) Not draining before starting
b) Overfiring
c) Poor boiler circulating
d) Dirty tube - ANSWER-d) Dirty tube
A boiler has a steaming capacity of 34,500 lb of steam per
hour. The evaporation rate is 10lb/ft^2 of heating surface
per hour. What is the boiler heating surface?
a) 100
b) 1,000
c) 3,450
d) 6,900 - ANSWER-c) 3,450
How many square feet of heating surface does a 3-inch
fire-tube 20 ft long with a 3/16-inch wall have?
a) 13.7
b) 14.7
c) 15.7
d) 16.7 - ANSWER-13.7
,3|Page
In a high-temperature hot water boiler, what would cause
a tube to overheat?
a) Dirty economizer tubes
b) High economizer feedwater outlet temperature
c) Feedwater temperature too high
d) Poor circulation (plugged tube) - ANSWER-d) Poor
circulation (plugged tube)
A downcomer is
a) located in a fire-tube boiler
b) one of the tubes that supports the furnace
c) used to circulate flue gas
d) found in a water-tube boiler - ANSWER-d) found in a
water-tube boiler
Extreme firebox temperature changes cause
a) spalling
b) lower stack temperatures
c) increased soot deposits
d) a rise in stack temperature - ANSWER-a) spalling
, 4|Page
The low-water cutoff
a) feeds the boiler when it is low on water
b) shuts off the burner when the boiler is low on water
c) dumps the boiler
d) cuts off the water supply when the level is too high -
ANSWER-b) shuts off the burner when the boiler is low on
water
Steam coming from the bottom try cock would indicate
a) normal water level
b) high water level
c) low water level
d) normal steam level - ANSWER-c) low water level
What type of valve has the most resistance to flow?
a) Globe
b) Gate
c) Ball
d) Butterfly - ANSWER-a) Globe
When checking the water level of a boiler,
a) ask the boiler operator
