Question 1

The curb's cross braces are intended to support the duct connections to the unit, but not the entire air distribution system.

Accepted Answer

A) True 
 B)False  True

Question 2

With both fists in front of the body, pointing the thumbs outward tell the crane operator to ____ the boom.

Accepted Answer

A)   retract
B)   rotate
C)   extend
D)   lower C

Question 3

Name the four common types of VAV boxes.

Accepted Answer

Cooling and heating, cooling only, parallel blower-assisted, and series blower-assisted.

Question 4

When multiple rooftop units are used to condition the air in a building, it is common practice to label the units and their corresponding ____________________.

Accepted Answer

The answer of When multiple rooftop units are used to...

Question 5

Improper clearances do not affect the ability of service personnel to perform their jobs adequately.

Accepted Answer

A) True 
 B)False

Question 6

Gasketing materials and foam panels that are shipped with the curb are not part of the curb and should be discarded.

Accepted Answer

A) True 
 B)False

Question 7

A frame that is used to mount HVAC equipment is called a(n) ____________________.

Accepted Answer

The answer of A frame that is used to mount...

Question 8

Be sure to provide proper and adequate support for the duct system according to ____.

Accepted Answer

A)   installation instructions
B)   local building codes
C)   state building rules
D)   environmental regulations

Question 9

Rooftop units are often positioned ____ the space that is to be served by the equipment.

Accepted Answer

A)   directly below
B)   directly behind
C)   directly adjacent
D)   directly above

Question 10

In order to deliver different volumes of air to various areas in an occupied space, the blowers used on VAV systems must be able to modulate their openings to accommodate the changing needs of the system.

Accepted Answer

A) True 
 B)False

Question 11

Package units are factory-assembled, factory-charged, self-contained systems that have all of the major system components contained in a single housing.

Accepted Answer

A) True 
 B)False

Question 12

By raising the forearm in the air, index finger pointing upward and holding the hands straight, the operator will know to raise the cable on the crane.

Accepted Answer

A) True 
 B)False

Question 13

It should be noted that, in most cases, the supply and return ductwork must be attached to the ____ before the unit is set in place.

Accepted Answer

A)   boom
B)   package
C)   load
D)   curb

Question 14

Curbs can be prefabricated, but many larger curbs are shipped unassembled.

Accepted Answer

A) True 
 B)False

Question 15

An enthalpy sensor includes solid state temperature and ____ sensors.

Accepted Answer

A)   entropy
B)   barometer
C)   pressure
D)   humidity

Question 16

The fans that move air through the air-cooled condensers are of the ____-type.

Accepted Answer

A)   propeller
B)   squirrel
C)   cage
D)   push

Question 17

Explain the term "free cooling."

Accepted Answer

The answer of Explain the term "free cooling."...

Question 18

The temperature sensor used in chilled-water VAV systems to detect when the outside air is cold enough to cause freezing, is typically called a(n) ____________________.

Accepted Answer

The answer of The temperature sensor used in chilled-water VAV...

Question 19

It is good field practice to double-check and possibly triple-check the ____ decision, since the cost of repairing an improperly cut roof can be very high.

Accepted Answer

A)   location
B)   size
C)   capacity
D)   operational

Question 20

What are some drawbacks of adding more antifreeze than needed to prevent freezing in the chilled water piping system?

Accepted Answer

The answer of What are some drawbacks of adding more...

Exam 50: Commercial Rooftop, Packaged, Variable Refrigerant Flow, and Variable Air Volume Systems

The curb's cross braces are intended to support the duct connections to the unit, but not the entire air distribution system.

With both fists in front of the body, pointing the thumbs outward tell the crane operator to ____ the boom.

Name the four common types of VAV boxes.

When multiple rooftop units are used to condition the air in a building, it is common practice to label the units and their corresponding ____________________.

Improper clearances do not affect the ability of service personnel to perform their jobs adequately.

Gasketing materials and foam panels that are shipped with the curb are not part of the curb and should be discarded.

A frame that is used to mount HVAC equipment is called a(n) ____________________.

Be sure to provide proper and adequate support for the duct system according to ____.

Rooftop units are often positioned ____ the space that is to be served by the equipment.

In order to deliver different volumes of air to various areas in an occupied space, the blowers used on VAV systems must be able to modulate their openings to accommodate the changing needs of the system.

Package units are factory-assembled, factory-charged, self-contained systems that have all of the major system components contained in a single housing.

By raising the forearm in the air, index finger pointing upward and holding the hands straight, the operator will know to raise the cable on the crane.

It should be noted that, in most cases, the supply and return ductwork must be attached to the ____ before the unit is set in place.

Curbs can be prefabricated, but many larger curbs are shipped unassembled.

An enthalpy sensor includes solid state temperature and ____ sensors.

The fans that move air through the air-cooled condensers are of the ____-type.

Explain the term "free cooling."

The temperature sensor used in chilled-water VAV systems to detect when the outside air is cold enough to cause freezing, is typically called a(n) ____________________.

It is good field practice to double-check and possibly triple-check the ____ decision, since the cost of repairing an improperly cut roof can be very high.

What are some drawbacks of adding more antifreeze than needed to prevent freezing in the chilled water piping system?