National Practice Exam 1 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS
1. Copper-tube boilers typically have: (b) Better heat transfer characteristics, but shorter lifespans than cast-iron boilers
(a) Better heat transfer characteristics, and longer
lifespans than cast-iron boilers
(b) Better heat transfer characteristics, but shorter
lifespans than cast-iron boilers
(c) Worse heat transfer characteristics, but longer
lifespans than cast-iron boilers
(d) Worse heat transfer characteristics, and shorter
lifespans than cast-iron boilers
2. Which of the following is a similarity between (c) High-temperature limit switches
furnaces and boilers?
(a) Piping
(b) A low-level safety device
(c) High-temperature limit switches
(d) Backflow preventers
List the four safety controls found on hydronic systems: (a) Pressure relief valve, high temperature limit, low-water cutout, backflow
(a) Pressure relief valve, high temperature limit, low-water preventer
cutout, backflow preventer
(b) Low temperature limit, high water cut out, backflow
preventer, pressure relief valve
(c) Pressure relief valve, high temperature limit, water
cutoff, back flow preventer
(d) Pressure relief, high temperature limit, low water
cutout, back flow preventer
, What is the normal operating pressure in a boiler? (c) 12 to 15 psi
(a) 2 to 5 psi
(b) 5 to 9 psi
(c) 12 to 15 psi
(d) 9 to 12 psi
(e) 15 to 18 psi
In a two-story Victorian home with a boiler in the (b) No
basement you find a pressure-reducing valve set to 12
psi. Is there a possibility that his valve is set too low?
(a) Yes
(b) No
Where is the expansion tank typically, in an open (b) Above the highest level radiator
system?
(a) Below the highest level radiator
(b) Above the highest level radiator
(c) Horizontal of the highest level radiator
(d) Inside of the highest level radiator
When a black steel pipe is extended with copper pipe, (a) The steel pipe may rust at the connection due to galvanic reaction
what can occur?
(a) The steel pipe may rust at the connection due to
galvanic reaction
(b) The circulator may not be able to overcome the
pressure change at the junction
(c) The copper pipe will wear through with the friction
force of the water
(d) The copper pipe will rust because of the galvanic
reaction
What is the purpose of the bleed valve near the top of (c) This allows the homeowner to remove trapped air from the radiator, letting the
the radiator? radiator fill with water and heat the room effectively
(a) It does not have a purpose
(b) This allows the homeowner to fill the radiator with
water
(c) This allows the homeowner to remove trapped air
from the radiator, letting the radiator fill with water and
heat the room effectively
(d) This allows the homeowner to seal trapped air from
the radiator, letting the radiator fill with water and heat
the room effectively
Which of the following BEST describes the report (a) Conclusion
statement shown below? "The roof is in good condition
for its age."
(a) Conclusion
(b) Recommendation
(c) Description
(d) Disclaimer
1. Copper-tube boilers typically have: (b) Better heat transfer characteristics, but shorter lifespans than cast-iron boilers
(a) Better heat transfer characteristics, and longer
lifespans than cast-iron boilers
(b) Better heat transfer characteristics, but shorter
lifespans than cast-iron boilers
(c) Worse heat transfer characteristics, but longer
lifespans than cast-iron boilers
(d) Worse heat transfer characteristics, and shorter
lifespans than cast-iron boilers
2. Which of the following is a similarity between (c) High-temperature limit switches
furnaces and boilers?
(a) Piping
(b) A low-level safety device
(c) High-temperature limit switches
(d) Backflow preventers
List the four safety controls found on hydronic systems: (a) Pressure relief valve, high temperature limit, low-water cutout, backflow
(a) Pressure relief valve, high temperature limit, low-water preventer
cutout, backflow preventer
(b) Low temperature limit, high water cut out, backflow
preventer, pressure relief valve
(c) Pressure relief valve, high temperature limit, water
cutoff, back flow preventer
(d) Pressure relief, high temperature limit, low water
cutout, back flow preventer
, What is the normal operating pressure in a boiler? (c) 12 to 15 psi
(a) 2 to 5 psi
(b) 5 to 9 psi
(c) 12 to 15 psi
(d) 9 to 12 psi
(e) 15 to 18 psi
In a two-story Victorian home with a boiler in the (b) No
basement you find a pressure-reducing valve set to 12
psi. Is there a possibility that his valve is set too low?
(a) Yes
(b) No
Where is the expansion tank typically, in an open (b) Above the highest level radiator
system?
(a) Below the highest level radiator
(b) Above the highest level radiator
(c) Horizontal of the highest level radiator
(d) Inside of the highest level radiator
When a black steel pipe is extended with copper pipe, (a) The steel pipe may rust at the connection due to galvanic reaction
what can occur?
(a) The steel pipe may rust at the connection due to
galvanic reaction
(b) The circulator may not be able to overcome the
pressure change at the junction
(c) The copper pipe will wear through with the friction
force of the water
(d) The copper pipe will rust because of the galvanic
reaction
What is the purpose of the bleed valve near the top of (c) This allows the homeowner to remove trapped air from the radiator, letting the
the radiator? radiator fill with water and heat the room effectively
(a) It does not have a purpose
(b) This allows the homeowner to fill the radiator with
water
(c) This allows the homeowner to remove trapped air
from the radiator, letting the radiator fill with water and
heat the room effectively
(d) This allows the homeowner to seal trapped air from
the radiator, letting the radiator fill with water and heat
the room effectively
Which of the following BEST describes the report (a) Conclusion
statement shown below? "The roof is in good condition
for its age."
(a) Conclusion
(b) Recommendation
(c) Description
(d) Disclaimer
