Air Conditioning Repair Heat Load Calculations and System Sizing 2

Question 1

What type of heat gain is caused by heat transferring through walls, roofs, and floors due to a temperature difference?

Accepted Answer

Conductive heat gain

Answer

Solar heat gain

Answer

Latent heat gain

Answer

Internal heat gain

Question 2

In the northern hemisphere, windows facing which direction typically contribute the greatest solar heat gain during summer afternoons?

Accepted Answer

West

Answer

North

Answer

East

Answer

South

Question 3

What does the latent heat load in an air conditioning system represent?

Accepted Answer

Moisture that must be removed from the air

Answer

Heat generated by lighting and appliances

Answer

Heat that must be removed to lower air temperature

Answer

Heat transferred through the building envelope

Question 4

ASHRAE design outdoor conditions used in load calculations are based on which statistical criteria?

Accepted Answer

A temperature exceeded only 1% of annual hours

Answer

The absolute hottest temperature ever recorded locally

Answer

The average high temperature in the hottest month

Answer

The temperature at solar noon on the summer solstice

Question 5

How does uncontrolled air infiltration affect a building's cooling load?

Accepted Answer

It adds both sensible and latent load by introducing unconditioned outdoor air

Answer

It has no measurable effect on the cooling load

Answer

It only affects the heating load, not the cooling load

Answer

It reduces the load by diluting indoor heat sources

Question 6

What is the primary purpose of an ACCA Manual D calculation?

Accepted Answer

Designing and sizing the duct distribution system

Answer

Determining residential heating and cooling loads

Answer

Calculating the correct refrigerant charge

Answer

Selecting thermostat setpoints for efficiency

Question 7

In a residential load calculation, what category includes heat generated by occupants, lighting, and household appliances?

Accepted Answer

Internal heat gain

Answer

Conductive heat gain

Answer

Solar heat gain

Answer

Infiltration heat gain