Exam (elaborations)
HVAC EXAM QUESTIONS AND ANSWERS
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HVAC EXAM QUESTIONS AND ANSWERS
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HVAC EXAM QUESTIONS AND ANSWERSSealing up even small openings in a building conserves energy because... - Answers -it
stops the infiltration of outside air or ex-filtration of comfortable conditioned inside air by
way of convection currents
Heat is easily transferred through windows and chimneys and not easily through
insulation - Answers -True
Which of the following items would not be a part of a gas furnace forced air perimeter
heating system? - Answers -Boiler
In a forced air heating system, a(n)... is a system of ducts that brings cold air back to the
furnace from various rooms of the building - Answers -Air return
Select all the types of material that are satisfactory for duct work in a warm air perimeter
system - Answers -Sheet Metal
Vitrified tile
concrete pipe
plastic pipe
Which of the following is (are) included in heating calculations? - Answers -Heat
transferred through walls
Heat transferred through windows
Heat transferred through doors
Heat transferred through ceilings
Heat transferred through foundation
You don't need to provide extra humidity during winter months because improved air-
sealing techniques preserve indoor humidity. - Answers -True
Select the true statement about registers. - Answers -Supply registers control the
direction and throw of air into a room.
What is the preferred material for supply ducts in conditioned spaces? - Answers -Sheet
metal
A manifold, found in many hydronic heating systems, is used only if... - Answers -the
building has zoned heating
In an air cooling system, there are two coils through which refrigerant is circulated. One,
called a ___(1)___ , absorbs heat from the warm air passing over it. The heated
refrigerant is then pumped through another coil called a ___(2)___, where the
refrigerant passes its collected heat to the atmosphere. - Answers -1. evaporator
2. condenser
, Testing has shown that in a modern home, indoor air should be exchanged with fresh
outdoor air... - Answers -every two to three hours
A voluntary labeling program called ______ Star offered marketing advantages to
manufacturers while alerting consumers to what products could save them money in
operating costs. - Answers -Energy
(BAH) The author recommends that you do which of the following. - Answers -Engage
your HVAC subcontractor early in the design process.
Make sure your design includes a central spot for the air-handling equipment
Make sure there is plenty of room to run ducts.
Even the best windows create conduction losses more than ____ times higher than
walls. - Answers -10
The _____ furnace costs more, but you can use one over a crawl space or where ducts
run under the slab. - Answers -down-flow
Selects the statements that are true about a horizontal furnace. - Answers -Used
primarily for attic and crawl space applications
A larger and more efficient unit is required to offset energy losses that come with
placing your furnace in an unconditioned space.
Today, most residential cooling is supplied by a "_________" which consists of an
outdoor condensing coil and compressor connected to an indoor evaporative coil with
refrigerant tubing. - Answers -split system
Although heat pumps cost a few hundred dollars more than a standard air conditioner,
they can save money when used in ______ climates. - Answers -temperate
Which of the following is (are) included in a package unit? - Answers -Compressor
Blower
Coils
Heater
A _____ system has a spiderweb-like distribution network of supply ducts running
straight from the furnace to each outlet. This provides a direct method of air delivery that
maintains balanced pressure throughout the system. - Answers -radial
It is both illegal and unwise to conceal ductwork in a bulkhead or chase. - Answers -
False
Returns can work either actively or passively - Answers -True
_______-room returns generally run more quietly and afford more privacy. - Answers -
Multiple
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