HVAC 50 QUESTION ESCO TEST

Front

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

Back

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

Front

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

Back

wet-bulb temps of the air

Front

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

Back

Compression, Condensation, Expansion, Evaporation

Front

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

Back

Airflow Isusse

Front

Airflow problems are caused by? Dirty Evap, Restriction in Duct, Dirty Filters

Back

All of the above

Front

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

Back

Refrigerant Flow Problem

Front

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

Back

Evap

Front

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

Back

12-20

Front

A system with an overcharge of refrigerant will have?

Back

A higher than normal condensing temp

Front

An ineffective compressor will cause?

Back

All of the above