RSES Condenser Systems 3

Question 1

When a technician observes a high condenser approach temperature on a water-cooled unit, what is the most likely cause?

Accepted Answer

Fouled condenser tubes or inadequate water flow

Answer

Fouled tubes or restricted water flow reduce heat transfer, causing the condensing temperature to rise well above the leaving water temperature.

Question 2

What is the correct sequence for purging non-condensable gases from a condenser?

Accepted Answer

Run system to high head pressure, then vent from highest point

Answer

Non-condensables migrate to the top of the condenser; with the system running, venting slowly from the highest point releases trapped gases while minimizing refrigerant loss.

Question 3

A flooded condenser control valve modulates to:

Accepted Answer

Flood the condenser with liquid to raise head pressure in cold weather

Answer

In cold ambient conditions, a flooded condenser control valve backs liquid refrigerant into the condenser to reduce effective surface area and maintain adequate head pressure.

Question 4

Which measurement best confirms adequate airflow through an air-cooled condenser?

Accepted Answer

Static pressure drop across the coil

Answer

Measuring static pressure drop across the condenser coil indicates whether airflow is within the design range for that coil.

Question 5

In an evaporative condenser, Legionella risk is primarily controlled by:

Accepted Answer

Proper biocide treatment and water management program

Answer

Legionella thrives in warm stagnant water, so a proper biocide treatment and water management plan is the primary control measure in evaporative condensers.

(RSES) Refrigeration Service Engineers Society Certification Practice Test

(RSES) Refrigeration Service Engineers Society Certification Practice Test

RSES Condenser Systems 3