What is the device that removes heat from a mechanical refrigeration system?

• condensor
• evaporator
• compressor
• metering device

The total heat load consists of the amount of heat to be removed from a cabinet during certain period, and is the sum of various heat loads per what unit of time?

• 3 hours
• 8 hours
• 24 hours
• 48 hours

Select the statement NOT RELATED to a chilled water air conditioning system:

• they commonly use water towers
• the chiller is located on the low side of the system
• they are primarily used in residential system
• they use water as a secondary refrigerant

Which component is NOT a part of an absorption system?

• generator
• absorber
• evaporator
• compressor

Mechanical ventilation topic: Ventilation air shall NOT be ____ from one dwelling to another or to dissimilar occupancies.

• required
• exhausted
• contaminated
• re-circulated

A steel piping in a hydronic system needs to be installed. Indicate the Maximum vertical spacing in accordance with MSS.

• 18 feet.
• 15 feet.
• 12 feet.
• 9 feet.

Stud wall cavities:

• can be used as part of the fire-rated assembly
• can be used as a return duct if properly fitted
• can be used as a plenum for supply air
• can convey air up to two floor levels

The pipe size of each section of gas piping shall be determined by using the longest length of piping from the ____.

• branch point to the appliance
• point of delivery to most remote appliance
• the mean of all piping
• branch point to the appliance

In a refrigeration system, superheat does NOT normally occur in the

• suction line
• liquid line accumulator
• compressor
• top part of the condenser

The access door for a fire damper shall be labeled with letters NOT less than ___ in height.

• 1/2 inch
• 3/4 inch
• 1 inch
• 1 1/2 inch