1st Year 1st Semester Final 25-26 — Worksheet Questions

Point ___ on the drawing shown in Figure 112.211 is the point where the grounded conductor is connected.

• II

• I

• III

Answer explanation

Point I is where the grounded conductor is connected, as indicated in Figure 112.211. The other points, II and III, do not represent the connection for the grounded conductor.

Point ___ on the drawing shown in Figure 112.211 is the point where the ungrounded conductor is connected.

• II

• I

• III

• none of these

Answer explanation

Point II is where the ungrounded conductor is connected, as indicated in the drawing. The other points do not represent the connection for the ungrounded conductor.

Refer to Figure 116.102. Which of the connection diagrams is correctly drawn? The receptacle is to be constantly "hot," the light should operate from one location, and the fan should operate from two locations.

• Neither I nor II

• II only

• Both I and II

• I only

Answer explanation

Connection diagram II is correct as it ensures the receptacle is always hot, the light is controlled from one location, and the fan operates from two locations. Diagram I does not meet these requirements.

Refer to Figure 112.31. The receptacle is ___.

• switched

• constantly "hot"

Answer explanation

The receptacle is constantly "hot" because it receives power at all times, regardless of any switches. This means it is always ready to supply electricity, unlike a switched receptacle that only provides power when activated.

Refer to Figure 116.103. Which of the connection diagrams is correctly drawn? The receptacle is to be constantly "hot," the light should operate from one location, and the fan should operate from two locations.

• Neither I nor II

• II only

• Both I and II

• I only

Answer explanation

Choice I is correct because it ensures the receptacle is always hot, the light is controlled from one location, and the fan operates from two locations. Choice II does not meet these requirements.

What conductor in a circuit can be marked with a green color? I. grounded II. equipment grounding III. ungrounded

• I only

• II & III only

• I & II only

• II only

• III only

Answer explanation

In electrical circuits, the green color is specifically used for equipment grounding conductors (II). Grounded conductors (I) are typically not marked green, and ungrounded conductors (III) should not be marked green either.

Is it permitted to control a 120-volt incandescent (tungsten filament) lighting circuit with a switch rated for 15 A and 120-277 V? The circuit has 14 fixtures and each fixture will have a 150 W, 120-V lamp installed in it.

• Yes

• No

Answer explanation

No, the total load is 2,250 W (150 W x 15 fixtures), which exceeds the 15 A switch rating at 120 V (1,800 W). This could lead to overheating and failure of the switch, making it unsafe.

Tags

NGSS.HS-ETS1-3

Is it permitted to control a 120-volt incandescent (tungsten filament) lighting circuit with a switch rated for 15 A and 120-277 V? The circuit has 9 fixtures and each fixture will have a 200 W, 120-V lamp installed in it.

• Yes

• No

Answer explanation

Yes, it is permitted. The total load is 1800 W (9 fixtures x 200 W), which equals 15 A at 120 V. The switch rated for 15 A and 120-277 V can handle this load safely.

Tags

NGSS.HS-ETS1-3

Refer to Figure 112.512. The lamp on the right is to be ON constantly (as a night light) and the lamp on the left is to be controlled from the switch. Which of the connection diagrams is wired to operate correctly and does not violate 200.7 in the NEC®? Type AC 12-2 and 12-3 cables are used between the outlet boxes. Future wall access is available as required in NEC® 404.2(C)(2).

• I

• II

• III

• IV

• none of these

Answer explanation

Diagram III correctly connects the lamps, ensuring the right lamp is always ON while allowing the left lamp to be controlled by the switch. This setup complies with NEC® 200.7, making it the appropriate choice.

Refer to Figure 112.513. The lamp on the right is to be ON constantly (as a night light) and the lamp on the left is to be controlled from the switch. Which of the connection diagrams is wired to operate correctly and does not violate 200.7 in the NEC®? Type AC 12-2 and 12-3 cables are used between the outlet boxes. Future wall access is available as required in NEC® 404.2(C)(2).

• neither I nor II

• II only

• both I & II

• I only

Answer explanation

Choice I is correct because it allows the lamp on the right to remain ON while controlling the left lamp with the switch, complying with NEC® 200.7. Choice II does not meet the requirements for constant power to the night light.