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Ac333 Practice Questions

47 Questions  I  By Azortex
AC333 Practice Questions
AC333 Practice Questions

  
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1.  The resistance wire often used in an electric heating element is made of:
A.
B.
C.
D.
2.  Radiant heat is transferred by:
A.
B.
C.
D.
3.  Most electric baseboards units are _________
A.
B.
C.
D.
4.  Central forced-air electric furnaces frequently use _________ to start and stop multiple heating circuits.
A.
B.
C.
D.
5.  A sequencer utilizes a _________ to initiate its operation.
A.
B.
C.
D.
6.  The component located in the thermostat that shuts the electric furnace down prematurely so that the space will not be overheated is the:
A.
B.
C.
D.
7.  The disadvantage in using a contactor to open and close the circuit to the electric heating elements is the:
A.
B.
C.
D.
8.  A limit switch or control is used to:
A.
B.
C.
D.
9.  Electric unit heaters are usually installed:
A.
B.
C.
D.
10.  Electric ceiling panel heat:
A.
B.
C.
D.
11.  The _____________ thermostat is commonly used for forced-air electric furnace installations.
A.
B.
C.
D.
12.  The _____________ thermostat is commonly used for baseboard electric heat installations.
A.
B.
C.
D.
13.  The control voltage for the controls on a sequencer are typically:
A.
B.
C.
D.
14.  An electric furnace is operating on 225 V and is drawing 83 amps.  What heat capacity is this furnace putting out?
A.
B.
C.
D.
15.  Radon is a(an):
A.
B.
C.
D.
16.  Formaldehyde byproducts may be found in:
A.
B.
C.
D.
17.  Dust mites are:
A.
B.
C.
D.
18.  Mold:
A.
B.
C.
D.
19.  The first step with regard to mold cleanup should be:
A.
B.
C.
D.
20.  Carbon monoxide:
A.
B.
C.
D.
21.  Auto exhaust produces carbon monoxide.
A.
B.
22.  Wood smoke may contain:
A.
B.
C.
D.
23.  Disturbed materials containing asbestos:
A.
B.
C.
D.
24.  Ventilation is:
A.
B.
C.
D.
25.  Duct cleaning is accomplished by:
A.
B.
C.
D.
26.  All humidifiers must:
A.
B.
C.
D.
27.  Air in homes tend to be drier in the:
A.
B.
28.  If the relative humidity is 60%, it means that:
A.
B.
C.
D.
29.  Humidification generally relates to a process of causing water to ________ into the air:
A.
B.
C.
D.
30.  Infrared humidifiers reflect infrared energy:
A.
B.
C.
D.
31.  A humidistat has ________ element and is generally used to control a humidifier.
A.
B.
C.
D.
32.  Atomizing humidifiers discharge ________ into the air.
A.
B.
C.
D.
33.  Two types of atomizing humidifiers are the:
A.
B.
C.
D.
34.  If reservoir-type humidifiers are not properly maintained, which of the following may collect and be discharged into the air?
A.
B.
C.
D.
35.  In the ionizing section of an electronic air cleaner, the particles in the air are:
A.
B.
C.
D.
36.  Extended surface filters often use ________, which provides air cleaning efficiencies up to three times greater than those of fiberglass.
A.
B.
C.
D.
37.  Typically, air-conditioning (cooling) systems require an airflow of ________ cfm per ton.
A.
B.
C.
D.
38.  If air conditioning is added to a heating system, the supply duct should be insulated to keep it from sweating and to keep the air in the duct from ________ in the cooling season.
A.
B.
C.
39.  A heating system typically requires ________ a cooling system.
A.
B.
C.
40.  In evaluating an air distribution system, the terminal units called the ________ are an important factor.
A.
B.
C.
D.
41.  When two low-voltage transformers are wired in parallel, care must be taken to ensure that they are wired:
A.
B.
C.
42.  When adding an air-conditioning system to an existing furnace, frequently a ________ must be added to the control circuits.
A.
B.
C.
D.
43.  When designing an all-weather system, the ductwork is designed around ________ system.
A.
B.
C.
44.  Too much airflow across the heat exchanger in a gas or oil heating system can cause ________ problems.
A.
B.
C.
D.
45.  When adding a control transformer for air conditioning to an existing heating system, the second transformer can be wired in parallel with the original or:
A.
B.
C.
D.
46.  You need to install a 3-ton air-conditioning system on an existing furnace.  Using the chart in the text, Figure 42-4, which of the following will meet the fan needs?
A.
B.
C.
D.
47.  A 2½-ton cooling system must circulate approximately __________ cfm of air.
A.
B.
C.
D.
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