DC BOILER STATIONERY THIRD
TESTING ACTUAL EXAM 2026 WITH
QUESTIONS AND VERIFIED
CORRECT ANSWERS | ALREADY
GRADED A+ | GUARANTEED PASS |
DC BOILER STATIONERY LATEST
FINAL EXAM 2026
During a 24 hours operation how often should you check the water level? -
ANSWER- Once per shift
How often you checking the high limit switch? - ANSWER- Annually
What is the recommended time for a complete external inspection of a boiler? -
ANSWER- Once per shift
What is the first thing to do when shutting down a boiler? - ANSWER- Turn of the
fire
A flow control should be blown down when? - ANSWER- Once per shift
,How often should you check the Low Water Fuel Cut off? - ANSWER- Once per
shift
Why is oil added to the refrigerant? - ANSWER- To lubrication of the compressor
Keep refrigerant migrating
Recycled and filtered refrigerant can be used where? - ANSWER- By the same
owner in the same type of equipment
Data printed on the equipment nameplate would include manufacturer, model, and
serial number and ? - ANSWER- Stamp of approval from
commissioning authority
How many BTU does it take to raise 10 lbs of steam from 40 to 41 degrees? -
ANSWER- 1 BTU
When working on a boiler permits should be required? - ANSWER- For every shift
How many things do safety controls protect against? - ANSWER- Over pressure
Over Heating
Fire side explosions
What chemical compounds in water cause permanent hardness? - ANSWER-
Calcium Sulfate and Magnesium Silicate ( Page 531/534)
What chemicals are used to combat corrosion? - ANSWER- Sodium Sulfite and
Hydrazine
The component in which liquid vapor by absorbing heat is called? - ANSWER-
Evaporator
,Select the best answer electrical grounding method? - ANSWER- Metal stake drive
8 foot into the ground.
A valve should be used for throttling purpose? - ANSWER- The Globe
What is the acceptable range for residual sodium sulfite in the boiler maintenance?
- ANSWER- 30-70
What is the area of a steam engine cylinder reading 10 x 24, when the piston is
only travelling at 2/3 of the way? - ANSWER- 160 (10 x 24 x 2/3 ) =160
In a dual duct air handling system space thermostatic control building temperature
by? - ANSWER- Moving the air from the hot & cold duct in a molding box
serving the space
, A boiler is rated at (86,250 lbs, 88,250 lbs, 96,250 lbs) of steam per hour. What is
the equivalent boiler horsepower? - ANSWER- 2500 HP = 86,.5 = 2500
lbs
What is the area of a steam engine cylinder reading 10 x 24, when the piston is
only travelling at 2/3 of the way? - ANSWER- 160 (10 x 24 x 2/3 ) =160
What is the total force acting on a 4 inches diameter safety value disc with a boiler
pressure of 12 psi? - ANSWER- 150.79 TF = 150.79
The expansion tank on a closed loop system should be located? - ANSWER- On
the suction side of the pump
What is the primary purpose of a crank case heater on a reciprocating chiller? -
ANSWER- To prevent refrigeration migration
What is meant by the percent of (skip, step, and slip) in a pump? - ANSWER-
Percentage of flow compared minimum speed and full speed
e. The difference in theoretical capacity compared to the actual capacity
Which of the following types pump can be started with the discharge value closed?
- ANSWER- Centrifugal
The vertical distance from the center line of the pump up to top level of the supply
tank is called? - ANSWER- Static suction head
In a multi-zone air handling unit, the zone thermostat controls the zone temperature
by? - ANSWER- Dampers that control the air flow from the hot & cold deck
TESTING ACTUAL EXAM 2026 WITH
QUESTIONS AND VERIFIED
CORRECT ANSWERS | ALREADY
GRADED A+ | GUARANTEED PASS |
DC BOILER STATIONERY LATEST
FINAL EXAM 2026
During a 24 hours operation how often should you check the water level? -
ANSWER- Once per shift
How often you checking the high limit switch? - ANSWER- Annually
What is the recommended time for a complete external inspection of a boiler? -
ANSWER- Once per shift
What is the first thing to do when shutting down a boiler? - ANSWER- Turn of the
fire
A flow control should be blown down when? - ANSWER- Once per shift
,How often should you check the Low Water Fuel Cut off? - ANSWER- Once per
shift
Why is oil added to the refrigerant? - ANSWER- To lubrication of the compressor
Keep refrigerant migrating
Recycled and filtered refrigerant can be used where? - ANSWER- By the same
owner in the same type of equipment
Data printed on the equipment nameplate would include manufacturer, model, and
serial number and ? - ANSWER- Stamp of approval from
commissioning authority
How many BTU does it take to raise 10 lbs of steam from 40 to 41 degrees? -
ANSWER- 1 BTU
When working on a boiler permits should be required? - ANSWER- For every shift
How many things do safety controls protect against? - ANSWER- Over pressure
Over Heating
Fire side explosions
What chemical compounds in water cause permanent hardness? - ANSWER-
Calcium Sulfate and Magnesium Silicate ( Page 531/534)
What chemicals are used to combat corrosion? - ANSWER- Sodium Sulfite and
Hydrazine
The component in which liquid vapor by absorbing heat is called? - ANSWER-
Evaporator
,Select the best answer electrical grounding method? - ANSWER- Metal stake drive
8 foot into the ground.
A valve should be used for throttling purpose? - ANSWER- The Globe
What is the acceptable range for residual sodium sulfite in the boiler maintenance?
- ANSWER- 30-70
What is the area of a steam engine cylinder reading 10 x 24, when the piston is
only travelling at 2/3 of the way? - ANSWER- 160 (10 x 24 x 2/3 ) =160
In a dual duct air handling system space thermostatic control building temperature
by? - ANSWER- Moving the air from the hot & cold duct in a molding box
serving the space
, A boiler is rated at (86,250 lbs, 88,250 lbs, 96,250 lbs) of steam per hour. What is
the equivalent boiler horsepower? - ANSWER- 2500 HP = 86,.5 = 2500
lbs
What is the area of a steam engine cylinder reading 10 x 24, when the piston is
only travelling at 2/3 of the way? - ANSWER- 160 (10 x 24 x 2/3 ) =160
What is the total force acting on a 4 inches diameter safety value disc with a boiler
pressure of 12 psi? - ANSWER- 150.79 TF = 150.79
The expansion tank on a closed loop system should be located? - ANSWER- On
the suction side of the pump
What is the primary purpose of a crank case heater on a reciprocating chiller? -
ANSWER- To prevent refrigeration migration
What is meant by the percent of (skip, step, and slip) in a pump? - ANSWER-
Percentage of flow compared minimum speed and full speed
e. The difference in theoretical capacity compared to the actual capacity
Which of the following types pump can be started with the discharge value closed?
- ANSWER- Centrifugal
The vertical distance from the center line of the pump up to top level of the supply
tank is called? - ANSWER- Static suction head
In a multi-zone air handling unit, the zone thermostat controls the zone temperature
by? - ANSWER- Dampers that control the air flow from the hot & cold deck
