TEST BANK| COMPLETE 450 ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+|| BRAND NEW!!
Question 1
What is a Dual Duct System?
A. A system that uses a single duct for both heating and cooling
with reheat coils
B. A system in which hot air and cold air are supplied by
separate ducts and mixed at each controlled space to provide
the desired supply air temperature
C. A system that only supplies cold air and relies on electric
resistance heating
D. A system that uses water pipes instead of air ducts
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,Answer: B. A system in which hot air and cold air are supplied
by separate ducts and mixed at each controlled space
Rationale: Dual duct systems provide both heated and cooled
air through separate ducts to mixing boxes at each zone. This
method allows precise temperature control but consumes
significant energy due to simultaneous heating and cooling.
Question 2
What is a Multizone System?
A. An HVAC system with a single thermostat for the entire
building
B. An A/C system in which zone control is obtained by mixing hot
and cold air at the unit in response to a room thermostat
C. A system with multiple outdoor units and one indoor unit
D. A system that uses only radiant heating
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,Answer: B. An A/C system in which zone control is obtained by
mixing hot and cold air at the unit in response to a room
thermostat
Rationale: Multizone systems mix hot and cold air directly at the
air handling unit to satisfy different zone requirements. Each
zone has its own thermostat that controls dampers at the unit.
Question 3
What do load calculations take into consideration?
A. Only the square footage of the building
B. Sensible heat AND latent heat
C. Only the number of windows in the building
D. The age of the HVAC equipment only
Answer: B. Sensible heat AND latent heat
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, Rationale: Load calculations must account for both sensible heat
(temperature change) and latent heat (moisture/humidity) to
properly size HVAC equipment. Ignoring either leads to
improper system sizing and poor performance.
Question 4
Which of the following does NOT provide sensible heat gain?
A. Heat from sunlight through windows
B. Heat from cooking or hot baths
C. Heat from building occupants
D. Heat from electrical equipment
Answer: B. Heat from cooking or hot baths
Rationale: Heat from cooking or hot baths primarily contributes
latent heat (moisture-related) rather than sensible heat
(temperature-related). Sensible heat gain is from sources that
raise air temperature directly.
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