1 || |P | a | g | e
BOMA HVAC ACTUAL EXAM TEST
PREPARATION QUESTIONS WITH VERIFIED
SOLUTIONS
What happens when room temperature soda is poured into a glass of ice ? -
| | | | | | | | | | | | | |
ANSWER :The ice melts because it is absorbing heat from the soda .
| | | | | | | | | | | | |
The compressor in a refrigeration system - ANSWER :pumps the refrigerant throughout
| | | | | | | | | | |
the system
| |
What is the first step in troubleshooting procedures? - ANSWER :Analyze the
| | | | | | | | | | |
complaint
|
If the complaint is too little heat and the burner is short cycling the most likely cause
| | | | | | | | | | | | | | | |
is - ANSWER :Thermostat out of adjustment
| | | | | | |
What causes excessive combustion noise ? - ANSWER :Improper burner adjustment
| | | | | | | | | |
When the complaint is too much heat and the burner is running continuously the
| | | | | | | | | | | | |
cause is - ANSWER :Faulty wiring
| | | | | |
failure of a burner to start can be caused by - ANSWER :Blown fuse
| | | | | | | | | | | | |
What's the most probable cause of a burner to not start ? - ANSWER :Power failure
| | | | | | | | | | | | | | |
,2 || |P | a | g | e
Too much heat and the electrical wiring short cycling the cause is - ANSWER
| | | | | | | | | | | | |
:Thermostat heat anticipator set too low | | | | |
Most likely cause of a heating system not to start - ANSWER :Blown fuse
| | | | | | | | | | | | |
A psychrometric chart is a graphic representation of - ANSWER :Thermodynamic
| | | | | | | | | |
properties
|
Yea flows in one direction from - ANSWER :High temperature to low temperature
| | | | | | | | | | | |
Three main ways of heat transfer are - ANSWER :Convection conduction and
| | | | | | | | | | |
radiation
|
What is the best conductor of heat? - ANSWER :Metal
| | | | | | | | |
Heat will continue to flow between two bodies until they have become the same -
| | | | | | | | | | | | | |
ANSWER :Temperature
| |
T/F Enthalpy refers to the heat content of refrigerant - ANSWER :True
| | | | | | | | | | |
Psychrometric is the science of dealing with the relationship between - ANSWER | | | | | | | | | | |
:Humidity and the atmosphere | | |
Which of the following is not one of the four environmental qualities provided by ac
| | | | | | | | | | | | | |
systems - ANSWER :Electrostatic suppression
| | | | |
,3 || |P | a | g | e
Translated to Fahrenheit what is the value of absolute zero - ANSWER :-460 Fahrenheit
| | | | | | | | | | | | |
T/F mixing air on a mechanical bases causes a humid condition - ANSWER :True
| | | | | | | | | | | | |
Specific humidity may be defined as - ANSWER :Weight of water mixed with a
| | | | | | | | | | | | |
pound of dry air
| | | |
What is wet bulb depression - ANSWER :difference between wet-bulb and dry- bulb
| | | | | | | | | | | |
The active element of a humidity meter used in a humidistat is - ANSWER :Horse hair
| | | | | | | | | | | | | | |
T/F evaporative cooling is a variable heat process - ANSWER :False
| | | | | | | | | |
How to find volume of air through a duct - ANSWER :Size of duct (axb) / 144 x FPM
| | | | | | | | | | | | | | | | | |
The element that makes up most volume of air is - ANSWER :Nitrogen
| | | | | | | | | | | |
The pressure of a fluid varies directly with - ANSWER :It's height and density
| | | | | | | | | | | | |
Air flow through a duct has highest velocity near - ANSWER :The center of the duct
| | | | | | | | | | | | | | |
Quantity of air through a fan is expressed in - ANSWER :CFM
| | | | | | | | | | |
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Effective temperature takes into consideration the affect of - ANSWER :Air velocity
| | | | | | | | | | |
and humidity
| |
Velocity of air flowing through a duct is calculated in - ANSWER :Feet per min
| | | | | | | | | | | | | |
A fluid is anything that - ANSWER :Flows
| | | | | | |
T/F matter in a liquid state retains its size and quantity but not it's shape - ANSWER
| | | | | | | | | | | | | | | |
:True
|
T/F refrigeration Can be defined as the transfer of heat - ANSWER :True
| | | | | | | | | | | |
To calculate the required cfm for cooling applications - ANSWER :Multiply the
| | | | | | | | | | |
total cooling loads x 400 cfm per ton
| | | | | | | |
T/F 10% increase in fan speed will cause 33%increase in power - ANSWER :True
| | | | | | | | | | | | |
Can the performance of a fan at various speeds and air densities be predicted ? -
| | | | | | | | | | | | | | |
ANSWER :Yea through fan curve calculations
| | | | | |
T/F closing off dampers downstream of the dam will decrease the horsepower -
| | | | | | | | | | | |
ANSWER :True
| |
Two types of fan classifications are - ANSWER :Centrifugal and axial
| | | | | | | | | |
BOMA HVAC ACTUAL EXAM TEST
PREPARATION QUESTIONS WITH VERIFIED
SOLUTIONS
What happens when room temperature soda is poured into a glass of ice ? -
| | | | | | | | | | | | | |
ANSWER :The ice melts because it is absorbing heat from the soda .
| | | | | | | | | | | | |
The compressor in a refrigeration system - ANSWER :pumps the refrigerant throughout
| | | | | | | | | | |
the system
| |
What is the first step in troubleshooting procedures? - ANSWER :Analyze the
| | | | | | | | | | |
complaint
|
If the complaint is too little heat and the burner is short cycling the most likely cause
| | | | | | | | | | | | | | | |
is - ANSWER :Thermostat out of adjustment
| | | | | | |
What causes excessive combustion noise ? - ANSWER :Improper burner adjustment
| | | | | | | | | |
When the complaint is too much heat and the burner is running continuously the
| | | | | | | | | | | | |
cause is - ANSWER :Faulty wiring
| | | | | |
failure of a burner to start can be caused by - ANSWER :Blown fuse
| | | | | | | | | | | | |
What's the most probable cause of a burner to not start ? - ANSWER :Power failure
| | | | | | | | | | | | | | |
,2 || |P | a | g | e
Too much heat and the electrical wiring short cycling the cause is - ANSWER
| | | | | | | | | | | | |
:Thermostat heat anticipator set too low | | | | |
Most likely cause of a heating system not to start - ANSWER :Blown fuse
| | | | | | | | | | | | |
A psychrometric chart is a graphic representation of - ANSWER :Thermodynamic
| | | | | | | | | |
properties
|
Yea flows in one direction from - ANSWER :High temperature to low temperature
| | | | | | | | | | | |
Three main ways of heat transfer are - ANSWER :Convection conduction and
| | | | | | | | | | |
radiation
|
What is the best conductor of heat? - ANSWER :Metal
| | | | | | | | |
Heat will continue to flow between two bodies until they have become the same -
| | | | | | | | | | | | | |
ANSWER :Temperature
| |
T/F Enthalpy refers to the heat content of refrigerant - ANSWER :True
| | | | | | | | | | |
Psychrometric is the science of dealing with the relationship between - ANSWER | | | | | | | | | | |
:Humidity and the atmosphere | | |
Which of the following is not one of the four environmental qualities provided by ac
| | | | | | | | | | | | | |
systems - ANSWER :Electrostatic suppression
| | | | |
,3 || |P | a | g | e
Translated to Fahrenheit what is the value of absolute zero - ANSWER :-460 Fahrenheit
| | | | | | | | | | | | |
T/F mixing air on a mechanical bases causes a humid condition - ANSWER :True
| | | | | | | | | | | | |
Specific humidity may be defined as - ANSWER :Weight of water mixed with a
| | | | | | | | | | | | |
pound of dry air
| | | |
What is wet bulb depression - ANSWER :difference between wet-bulb and dry- bulb
| | | | | | | | | | | |
The active element of a humidity meter used in a humidistat is - ANSWER :Horse hair
| | | | | | | | | | | | | | |
T/F evaporative cooling is a variable heat process - ANSWER :False
| | | | | | | | | |
How to find volume of air through a duct - ANSWER :Size of duct (axb) / 144 x FPM
| | | | | | | | | | | | | | | | | |
The element that makes up most volume of air is - ANSWER :Nitrogen
| | | | | | | | | | | |
The pressure of a fluid varies directly with - ANSWER :It's height and density
| | | | | | | | | | | | |
Air flow through a duct has highest velocity near - ANSWER :The center of the duct
| | | | | | | | | | | | | | |
Quantity of air through a fan is expressed in - ANSWER :CFM
| | | | | | | | | | |
, 4 || |P | a | g | e
Effective temperature takes into consideration the affect of - ANSWER :Air velocity
| | | | | | | | | | |
and humidity
| |
Velocity of air flowing through a duct is calculated in - ANSWER :Feet per min
| | | | | | | | | | | | | |
A fluid is anything that - ANSWER :Flows
| | | | | | |
T/F matter in a liquid state retains its size and quantity but not it's shape - ANSWER
| | | | | | | | | | | | | | | |
:True
|
T/F refrigeration Can be defined as the transfer of heat - ANSWER :True
| | | | | | | | | | | |
To calculate the required cfm for cooling applications - ANSWER :Multiply the
| | | | | | | | | | |
total cooling loads x 400 cfm per ton
| | | | | | | |
T/F 10% increase in fan speed will cause 33%increase in power - ANSWER :True
| | | | | | | | | | | | |
Can the performance of a fan at various speeds and air densities be predicted ? -
| | | | | | | | | | | | | | |
ANSWER :Yea through fan curve calculations
| | | | | |
T/F closing off dampers downstream of the dam will decrease the horsepower -
| | | | | | | | | | | |
ANSWER :True
| |
Two types of fan classifications are - ANSWER :Centrifugal and axial
| | | | | | | | | |
