Author Question: When changing a low-voltage transformer, the service technician should: A) Use a replacement ... (Read 116 times)

panfilo · **on:** Jul 24, 2018

When changing a low-voltage transformer, the service technician should:

A) Use a replacement transformer with a higher VA rating to make it last longer.
B) Check all low-voltage controls for shorts and grounds.
C) Use a replacement transformer with a higher-voltage primary winding to make it last longer.
D) Temporarily short across the secondary side of the transformer to test its output.

Question 2

What kind of expansion tank must be installed above the highest terminal unit?

A) Diaphragm type B) Closed type
C) Pressure-relief type D) Open type