Construction Electrical Systems in Construction 2

Question 1

What is the purpose of a load center (electrical panel) in a building?

Accepted Answer

To distribute electrical power to branch circuits and provide overcurrent protection

Answer

To step down utility voltage to usable levels

Answer

To convert AC power to DC power for appliances

Answer

To monitor and record electrical usage for billing

Question 2

When pulling wire through conduit, what material is commonly used to reduce friction?

Accepted Answer

Wire pulling lubricant (wire pulling gel)

Answer

Motor oil

Answer

WD-40

Answer

Silicone spray

Question 3

What is the minimum clearance required between the top of a residential electrical panel and the ceiling?

Accepted Answer

6.5 feet

Answer

3 feet

Answer

6 feet

Answer

No minimum required

Question 4

What does the term 'ampacity' refer to in electrical construction?

Accepted Answer

The maximum current a conductor can carry continuously without exceeding its temperature rating

Answer

The voltage capacity of a conductor

Answer

The total wattage a circuit can handle

Answer

The resistance of a conductor per foot

Question 5

Which AWG wire size is commonly used for a 20-amp, 120-volt branch circuit?

Accepted Answer

12 AWG

Answer

14 AWG

Answer

10 AWG

Answer

8 AWG

Question 6

What is a 'home run' in electrical construction terminology?

Accepted Answer

The cable that runs from the last device on a circuit back to the panel

Answer

The main service entrance cable from the utility

Answer

The feeder from the panel to a subpanel

Answer

The ground wire routed to the grounding electrode system

Question 7

Under OSHA 1926 Subpart K, what is the required assured equipment grounding conductor program (AEGCP) used as an alternative to?

Accepted Answer

GFCI protection on construction sites

Answer

Lockout/Tagout procedures

Answer

Arc flash labeling requirements

Answer

Low-voltage equipment exemptions