EGSA Load Bank Testing 3

Question 1

What parameter must be verified before connecting a load bank to a generator to confirm compatibility?

Accepted Answer

The load bank's voltage and frequency rating match the generator output

Answer

The load bank voltage and frequency ratings must match generator output to prevent equipment damage and ensure accurate testing.

Question 2

During a 2-hour full-load test, the coolant temperature gradually rises above the normal operating range. The most likely cause is:

Accepted Answer

A restricted cooling system or low coolant level

Answer

Rising coolant temperature under sustained load typically indicates a coolant system restriction, low coolant level, or failing thermostat.

Question 3

What is the purpose of recording generator data at regular intervals (e.g., every 15 minutes) during a load bank test?

Accepted Answer

To track parameter trends that may indicate developing problems

Answer

Interval data logging captures trending parameters that reveal degradation or instability not visible at a single snapshot in time.

Question 4

Which NFPA standard governs the testing requirements for emergency standby generators in healthcare facilities?

Accepted Answer

NFPA 110

Answer

NFPA 110 sets the standard for Emergency and Standby Power Systems, including load testing intervals and acceptance criteria.

Question 5

A load bank test reveals the generator frequency drops from 60 Hz to 57 Hz under full load and does not recover. This most likely indicates:

Accepted Answer

A governor or fuel delivery problem

Answer

Frequency is controlled by engine speed; a persistent drop under load points to governor malfunction or inadequate fuel delivery.

(EGSA) Electrical Generating Systems Association Certified Practice Test