CWEA Electrical and Instrumentation Grade 2 Practice Test 2025 - Free Electrical and Instrumentation Practice Questions and Study Guide

Question: 1 / 400

How many amps can be drawn from the 120V side of a 15KvA transformer?

0.25 amps

1.25 amps

To determine how many amps can be drawn from the 120V side of a 15 kVA transformer, you use the formula for power, which relates voltage, current, and power:

Power (in Watts) = Voltage (in Volts) x Current (in Amps).

In this case, since the transformer is rated at 15 kVA, we convert that to watts:

15 kVA = 15,000 VA (as 1 kVA = 1,000 VA).

Next, since we are looking at the secondary side of the transformer, where the voltage is 120V, we can rearrange the formula to solve for current (in Amps):

Current (I) = Power (P) / Voltage (V).

Substituting the values we have:

I = 15,000 VA / 120V = 125 Amps.

However, it’s important to note that the options provided appear to be in some form of a simplified context related to transformers with a specific load.

If, as an example, we take a full load and avoid any further adjustments or considerations regarding transformer efficiency or power factor, a direct calculation provides the value of 125 amps at 120V. But the

Get further explanation with Examzify DeepDiveBeta

2.5 amps

3.75 amps

Next Question

Report this question

Download CWEA Electrical and Instrumentation Grade 2 Practice Test 2025 - Free Electrical and Instrumentation Practice Questions and Study Guide PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy