CPI Pump, Motor & Heater Inspection 2

Question 1

What does a high-pitched squealing noise from a pool pump motor most commonly indicate?

Accepted Answer

Worn or failing bearings

Answer

High-pitched squealing from a pool pump motor is a classic symptom of worn or failing bearings that require replacement.

Question 2

When inspecting a gas pool heater, what is the purpose of the pressure switch?

Accepted Answer

It ensures adequate water flow before allowing ignition

Answer

The pressure switch on a gas pool heater verifies that sufficient water flow is present before permitting ignition, preventing dry-fire damage.

Question 3

A pool pump is losing prime repeatedly. Which condition should an inspector check FIRST?

Accepted Answer

Suction-side fittings and lid O-ring for air leaks

Answer

Repeated loss of prime is most commonly caused by air infiltration on the suction side, including a deteriorated strainer lid O-ring.

Question 4

What is the standard maximum temperature setting for a residential pool heater thermostat per most safety guidelines?

Accepted Answer

104°F

Answer

Most safety guidelines and codes limit residential pool/spa heater thermostats to a maximum of 104°F to prevent scalding.

Question 5

During a CPI inspection, you observe white calcium deposits inside a gas heater's heat exchanger tubes. This condition primarily indicates:

Accepted Answer

High calcium hardness and scale buildup reducing heat transfer

Answer

White calcium scale inside heat exchanger tubes results from high calcium hardness and restricts water flow and heat transfer efficiency.

(CPI) Certified Pool & Spa Inspector Practice Test