HVAC 50 QUESTION ESCO TEST

To determine weather a unit has an airflow and/or refrigerant flow problem, what should the tech look for?

• Air temp split of the evap coil and determine if it is higher or lower than it should be.

• Air temp split of the condenser coil and determine if it is higher or lower than it should be.

• Frozen Coil

• Check the pressure of the coils

The tech must obtain the _ entering and leaving the coil to determine the required temp difference across the evap coil.

• wet-bulb temps of the air

• pressures

• dry-bulb temps of the air

• AMPS

The correct sequential order steps in the vapor compression process is:

• Compression, Condensation, Expansion, Evaporation

• Evaporation, Expansion, Compression, Condensation

• Expansion, Compression, Evaporation, Condensation

• Condensation, Expansion, Compression, Evaporation

If the temp reading across the coil is greater than the required reading for the system, what is the problem?

• Refrigeration Problem

• Airflow Isusse

• Electrical Issue

Airflow problems are caused by?

• Dirty Evap

• Restriction in Duct

• Dirty Filters

• All of the above

If there is a low temp drop across the Evap coil the problem is?

• Airflow Problem

• Refrigerant Flow Problem

• Electrical Problem

Air-cooled type condensers are always larger than the _ .

• Compressor

• Evap

• Condenser

• Metering Device

A commercial forced-air condenser with a receiver should have _ degree of subcooling.

• 12-20

• 5-10

• 21-30

• 30-35

A system with an overcharge of refrigerant will have?

• A higher than normal condensing temp

• A lower than normal condensing temp

• A higher than normal evaporating temp

• A lower than normal evaporating temp

An ineffective compressor will cause?

• Higher than normal suction pressure

• Lower than normal discharge pressure

• Low AMP draw

• All of the above