HVAC State Test Prep 09

According to the International Mechanical Code, heating and air-conditioning systems of the central type must be provided with approved filters. Filters must be installed in the return air system,

• midstream
• away
• upstream
• downstream

According to the Code, liquid adhesive coatings used on filters must have a flash point not lower than

• 175
• 325
• 425
• 575

Stratification is the separation of air into _________ having different temperatures.

• stratus
• streams
• units
• layers

Air filters used in hospitals, laboratories, and clean rooms are used for absolute filtration where

• 90
• 99
• 80
• 50

It is possible to obtain very high-efficiency filters. HEPA filters are capable of obtaining an efficiency of _________ percent.

• 99.99
• 90
• 95
• 97

All HVAC systems should include the capability for the introduction of some _________ air.

• polluted
• clean
• outside
• inside

Heat always passes from a warmer to a _________ object or space.

• colder
• moving
• stable
• warmer

Convection is heat transfer that takes place in liquids and _________.

• gases
• solids
• water
• metal

Conduction is heat transfer that takes place chiefly in _________.

• metals
• liquids
• solids
• gases

The surface temperature of the average adult’s skin is _________ degrees F.

• 100
• 80
• 97.5
• 96.8