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CWEA E/I Level 3 Test Questions & 100% Correct Answers
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CWEA E/I Level 3 Test Questions &100% Correct Answers
All the following are true of 240-volt systems compared to 480-volt systems, except:
a. they cost more to operate.
b. they require more current per unit
of power.
c. they require smaller circuit breakers.
d. they are safer. - ✔✔c. they require smaller circuit breakers.
If a charged capacitor is removed from a circuit, the capacitor:
a. retains its charge.
b. loses some of its charge.
c. loses most of its charge.
d. loses all of its charge. - ✔✔a. retains its charge.
Control systems are usually designed so that each individual circuit controls:
a. all functions of the machine.
b. at least two functions.
c. only one function.
, d. only one device. - ✔✔c. only one function.
A 115-volt, 2-KVA, single-phase generator operating at full load will deliver how many amperes?
a. 0.23
b. 17.4
c. 57.5
d. 230 - ✔✔b. 17.4
What is the current when a circuit has a 1,500- watt load and a power factor of 86%, and operates from
a three-phase 230-volt source?
a. 9.7 amps
b. 6.5 amps
c. 4.4 amps
d. 3.8 amps - ✔✔c. 4.4 amps
What is the amp-load of a three-phase, 0.5-hp, 230-volt motor with an efficiency rating of 92% and a
power factor of 80%?
a. 1.27 amps
b. 1.19 amps
c. 2.55 amps
c. 4.41 amps - ✔✔a. 1.27 amps
A three-phase, 460-volt motor draws a current of 52 amperes. The motor has an efficiency rating of
94% and a power factor of 80%. What is the horsepower? a. 24.1 hp
b. 41.7 hp
c. 50.0 hp
d. 73.8 hp - ✔✔b. 41.7 hp
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