Question 1

How would you check the calibration of a humidistat?

Accepted Answer

The calibration of a humidistat can be checked by using a sling psychrometer.

Question 2

A fiberglass media air filter contains a dust-holding adhesive that helps prevent particulates from ____.

Accepted Answer

A)  migrating downstream 
B)  migrating upstream 
C)  absorbing odors 
D)  releasing spores 
A)  migrating downstream 
B)  migrating upstream 
C)  absorbing odors 
D)  releasing spores A

Question 3

How can the installation of a humidifier help to reduce heating costs?

Accepted Answer

Dry air causes the person to feel cold, due to water evaporation from the skin, and to set the thermostat a few degrees higher to become comfortable, thus consuming more heating energy.

Question 4

How can humidification be provided in residences that do not have heating equipment with ductwork?

Accepted Answer

Self-conta

Question 5

Caution must be used with changing from one air-cleaning filter type to another. If a technician replaces a low-density filter with a high-density filter it is very likely that the airflow will be reduced.

Accepted Answer

A) True 
 B)False

Question 6

What is the major objection to using an atomizing humidifier with hard water?

Accepted Answer

Hard water contains minerals t

Question 7

What are the relative humidity limits recommended for residences?

Accepted Answer

A)  20% to 40%. 
B)  30% to 50%. 
C)  40% to 60%. 
D)  50% to 70%. 
A)  20% to 40%. 
B)  30% to 50%. 
C)  40% to 60%. 
D)  50% to 70%.

Question 8

Describe atomizing humidification.

Accepted Answer

It is based on the discharge o

Question 9

Because humidifiers use water, the evaporative surfaces and water reservoir must be cleaned and sanitized regularly to prevent the distributions of ____ by the moving airstream.

Accepted Answer

A)  fungi 
B)  bacteria 
C)  algae 
D)  All of the above. 
A)  fungi 
B)  bacteria 
C)  algae 
D)  All of the above.

Question 10

Define relative humidity.

Accepted Answer

The percent of moist

Question 11

The air in the home feels dry when it is heated because it expands, spreading out the moisture.

Accepted Answer

A) True 
 B)False

Question 12

Humidification generally relates to the process of causing water to ____ into the air.

Accepted Answer

A)  condense 
B)  evaporate 
C)  be ionized 
D)  be filtered 
A)  condense 
B)  evaporate 
C)  be ionized 
D)  be filtered

Question 13

In the ionizing section of an electronic air cleaner, the particles in the air are given a positive ____________________.

Accepted Answer

The answer of In the ionizing section of an electronic...

Question 14

One of the most common substances used as an absorber is ____.

Accepted Answer

A)  charcoal 
B)  silica gel 
C)  fiberglass 
D)  foam rubber 
A)  charcoal 
B)  silica gel 
C)  fiberglass 
D)  foam rubber

Question 15

Environmental tobacco smoke (ETS) is often referred to as ____________________.

Accepted Answer

The answer of Environmental tobacco smoke (ETS) is often referred...

Question 16

A house is built on property whose soil is rich in uranium. The occupants of the house may ____.

Accepted Answer

A)  be exposed to radon gas 
B)  be more susceptible to lung cancer 
C)  smell the pungent odor of the radon 
D)  Both a and b. 
A)  be exposed to radon gas 
B)  be more susceptible to lung cancer 
C)  smell the pungent odor of the radon 
D)  Both a and b.

Question 17

An atomizing humidifier should not operate when the furnace and blower are not operating.

Accepted Answer

A) True 
 B)False

Question 18

A supplemental photocatalytic oxidation filter (PCO) is often included with ____________________ air purifiers.

Accepted Answer

The answer of A supplemental photocatalytic oxidation filter (PCO) is...

Question 19

In electric furnace as well as heat pump systems, the recommended humidifier would be a(n) ____________________ type.

Accepted Answer

The answer of In electric furnace as well as heat...

Question 20

HEPA filters can filter to a very high efficiency, down to a(n) ____________________ micrometers-sized particle or lower.

Accepted Answer

The answer of HEPA filters can filter to a very...

Exam 34: Indoor Air Quality

How would you check the calibration of a humidistat?

A fiberglass media air filter contains a dust-holding adhesive that helps prevent particulates from ____.

How can the installation of a humidifier help to reduce heating costs?

How can humidification be provided in residences that do not have heating equipment with ductwork?

Caution must be used with changing from one air-cleaning filter type to another. If a technician replaces a low-density filter with a high-density filter it is very likely that the airflow will be reduced.

What is the major objection to using an atomizing humidifier with hard water?

What are the relative humidity limits recommended for residences?

Describe atomizing humidification.

Because humidifiers use water, the evaporative surfaces and water reservoir must be cleaned and sanitized regularly to prevent the distributions of ____ by the moving airstream.

Define relative humidity.

The air in the home feels dry when it is heated because it expands, spreading out the moisture.

Humidification generally relates to the process of causing water to ____ into the air.

In the ionizing section of an electronic air cleaner, the particles in the air are given a positive ____________________.

One of the most common substances used as an absorber is ____.

Environmental tobacco smoke (ETS) is often referred to as ____________________.

A house is built on property whose soil is rich in uranium. The occupants of the house may ____.

An atomizing humidifier should not operate when the furnace and blower are not operating.

A supplemental photocatalytic oxidation filter (PCO) is often included with ____________________ air purifiers.

In electric furnace as well as heat pump systems, the recommended humidifier would be a(n) ____________________ type.

HEPA filters can filter to a very high efficiency, down to a(n) ____________________ micrometers-sized particle or lower.

Heat and Pressure

Matter and Energy

Refrigeration and Refrigerants

General Safety Practices

Tools and Equipment

Fasteners

Tubing and Piping

Leak Detection, System Evacuation and System Clean-Up

Refrigerant and Oil Chemistry and Managementrecovery, Recycling, Reclaiming, and Retrofitting

System Charging

Calibrating Instruments

Basic Electricity and Magnetism

Introduction to Automatic Controls

Automatic Control Components and Applications

Troubleshooting Basic Controls

Advanced Automatic Controlsdirect Digital Controls Ddc and Pneumatics

Types of Electric Motors

Application of Motors

Motor Controls

Troubleshooting Electric Motors

Evaporators and the Refrigeration System

Condensers

Compressors

Expansion Devices

Special Refrigeration System Components

Application of Refrigeration Systems

Commercial Ice Machines

Special Refrigeration Applications

Troubleshooting and Typical Operating Conditions for Commercial Refrigeration

Electric Heat

Gas Heat

Oil Heat

Hydronic Heat

Comfort and Psychrometrics

Refrigeration Applied to Air Conditioning

Air Distribution and Balance

Installation

Residential Energy Auditing

Typical Operating Conditions

Troubleshooting

Heat Gain and Heat Loss in Buildings

Air Source Heat Pumps

Geothermal Heat Pumps

Domestic Refrigerators and Freezers

Room Air Conditioners

High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems

Cooling Towers and Pumps

Operation, Maintenance, and Troubleshooting of Chilled-Water Air Conditioning Systems

Commercial Rooftop, Packaged, Variable Refrigerant Flow, and Variable Air Volume Systems

Filters