Mechanical Engineering Quiz # 19

What season is it that the outdoor coil is refrozen?

Heating

Spring

Cooling

Winter

What does the term freeze cycle mean?

The process of completing an auction by placing a bid that is below the current price

The natural cooling of the Earth's atmosphere

The process of removing ice or frost buildup from the outdoor coil during the heating season

The delaying of various medical procedures to a later time

The time it takes for a computer to complete one cycle through its memory

What is the reduction of water vapor in air by cooling the air below the dew point?

Dehumidification

Evaporation

Condensation

What does dehumidification reduce the water vapor in air by?

Reducing water vapor

Changing the water vapor into another gas

Cooling the air

Making the air dry

What is the other type of basic cooling media?

Freon

Chilled water

A liquid refrigerant

A compressor

What is used to cool a direct expansion system?

Freon

A water coil

A fan

Water

How many types of cooling media are there?

Two

Three

Four

What type of air does a furnace pull into the combustion process?

Outside

Inside

What does a furnace "vent"?

Combustion gases directly outside

Hot air from the stove being vented

Heat produced by the burning of fuel

Warm air drawn in from the outdoors

Downflow air conditioning systems discharge air downward, directly beneath what?

A door

A window

A raised floor

A porch

What does a downflow furnace do at the bottom?

Expels warm air

Reduces temperature

Relieves pressure

Extracts heat from the furnace

Burns coal to produce heat

Which type of furnace does the return air come from the top of?

Upflow Furnace

Downflow Furnace

Wall Furnace

Both Downflow and Upflow Furnaces

Updraft Furnace

What is an air handling unit?

Fan

A/C unit

Filter

Duct

Heater

What type of material is used to construct duct?

Copper, aluminum, or other metal

Plastic sheeting, foam, or other insulating material

Sheet metal, fiberglass board, or other suitable material

What are channels or ductwork that carry air throughout a building?

Pipes or channels that carry air throughout a building

Walls

Electrical wiring

HVAC systems

What are Ductwork used to carry?

Water

Gas

Air

What are another name for channels or pipes?

Pipes

Canals

Ductwork

Tubes

Wires

What is the name of the device that filters out large particles and contaminants?

Electronic Air Cleaner

Vacuum cleaner

Dustbuster

What kind of contaminants does an electronic air cleaner filter out?

Pollutants and bacteria

All types of contaminants

All particles and contaminants

Pollutants and contaminants

Large particles and contaminants

The EER is the ratio of the cooling capacity of the air conditioner in what unit, to the total electrical input in watts under ARI-specified test conditions?

The wattage of the electrical input

Kilowatts

The number of BTUs in an hour

British Thermal Units

Watts

What is the name of the test that EER was based on?

Cambridge English Examination

ARI-specified test conditions

The Stanford-Binet Intelligence Scale

The Wechsler Adult Intelligence Scale-III

Dallas Theological Seminary Graduate Exam

What type of coil absorbs heat from the surrounding air and moves it outside the refrigerated area?

Condenser

Compressor

Evaporator

Heater

What is another name for the evaporator?

Fan, compressor or motor

Cooling coil, blower coil, chilling unit or indoor coil

Condenser, evaporator or cooling tower

Chiller

Condenser

What does a evaporator do?

Produces steam

Turns water into steam to produce power

Produces cold air

Absorbs heat from the surrounding air or liquid

Frees up liquid so it can evaporate

What is the purpose of the evaporator coil?

Remove moisture and pollutants from indoor air

Remove CO2 from indoor air

Take heat and moisture out of indoor air

Convert outdoor air into indoor air

Condense vapor from liquid products like shampoo

Which scale temperature measurement is most common in the US?

Kelvin

Fahrenheit

Celsius

Filters vary greatly in what?

Size

Flow rate

Pressure drop

Efficiency

Particle arrestance

What type of filter can be used to protect HVAC equipment?

Moisture filters

Foam

Carbon filters

Air Purifiers

Filters

A water cooled or glycol cooled system with an additional coil that provides chilled water cooling when the what is cold?

Outdoor ambient

Indoor ambient

A refrigerator

A computer

What are the units installed in the field without if needed?

Tiles

Sockets

Meters

Pipes

Ducts