CHAPTER 2, UTILIZATION EQUIPMENT DEVICES

Question 1

end-use piece of utilization equipment designed to perform a specific function such as cooking, cleaning, cooling, or heating

Answer 1

APPLIANCE

Question 2

permanently attached installations such as a built-in electric cook top or oven

Answer 2

FIXED APPLIANCES

Question 3

situated and used at a specific location but can be moved to another outlet such as a refrigerator, clothes washer, or clothes dryer.

Answer 3

STATIONARY APPLIANCES

Question 4

appliances that can be easily carried or moved such as a hair dryer or toaster.

Answer 4

PORTABLE APPLIANCES

Question 5

____________is a component in an electrical system that is designed to carry but not use electricity.

Answer 5

electrical device

Question 6

Electrical device includes components such as _________, ________, and _______.

Answer 6

switches, relays, receptacles

Question 7

the location in a branch circuit where electricity is used.

Answer 7

outlet

Question 8

a male connecting device that has two or more prongs

Answer 8

plug

Question 9

typically connected to a flexible cord that is attached to a portable appliance, light, or equipment.

Answer 9

plug

Question 10

_____________ and ________ offer a simple way to attach or detach an appliance or piece of equipment to/from an electrical outlet.

Answer 10

receptacles, plugs

Question 11

nema

Answer 11

national electrical manufacturing association

Question 12

_______ colored screws are for connection to the ungrounded conductor;

Answer 12

brass

Question 13

____________ colored screws are for the grounded or neutral conductor

Answer 13

silver

Question 14

________ colored screws are for the equipment grounding conductor.

Answer 14

green

Question 15

Receptacles marked “CO/ALR” can be connected to copper, aluminum or _________ conductors.

Answer 15

copper-clad aluminum

Question 16

Those marked “CU/AL” were formerly allowed for use with copper or aluminum conductors, but can only be connected to copper conductors. They are no longer deemed acceptable for use with _________ conductors.

Answer 16

aluminum

Question 17

A ________________ is a device placed between two or more electrical conductors in a circuit to safely and intentionally open or close the circuit or to redirect the path of current in a circuit.

Answer 17

simple switch

Question 18

Switches are rated by ________, _________, and _________,

Answer 18

purpose, voltage, amperage

Question 19

_______________ are used in building electrical systems. They are designed to reduce the possibility of contact with BARE ELECTRICAL CONDUCTORS and have current interrupting capability.

Answer 19

safety switches

Question 20

designed for heavy industry, commercial, and institutional applications where SAFETY, PERFORMANCE, and CONTINUITY of service are required. These are enclosed and may be fused or unfused. They are used extensively as motor circuit switches, service entrance switches, and feeder disconnects, as well as for industrial furnaces, capacitors, transformers, and welders. Ratings up to 1200 A, 600 V are available.

Answer 20

heavy-duty safety switches

Question 21

intended for industrial, general commercial and residential loads where ECONOMY IS IMPORTANT and requirements are less stringent. They are used on lighting, heating, appliance, and intermittent motor loads. Ratings up to 600 V are available.

Answer 21

general duty safety switches

Question 22

refers to the number of conductors the switch is opening and closing

Answer 22

pole

Question 23

refers to the number of operations a switch can perform

Answer 23

throw

Question 24

• It opens or closes a single ungrounded conductor in a circuit.

• It is the most commonly used switch found in buildings, where it is typically used to control a lighting installation from a single location.

Answer 24

SPST

Question 25

•  diverts current from one conductor path to another. •  A special type of SPDT switch is known as a three-way switch (S3), which allows the control of an installation from two locations (for instance, turning a light on or off from either end of a flight of stairs).

Answer 25

SPDT

Question 26

•  opens or closes two conductors in a circuit. •  It is equivalent to two SPST switches controlled by a single mechanism. •  It can be used to switch off the ungrounded and grounded conductors in a single lighting circuit that is serving a paint spray booth containing explosive vapors.

Answer 26

DPST

Question 27

used to provide control from one point by opening or

Answer 27

SPST

Question 28

used when multiple control points are needed.

Answer 28

S3 and S4 9 Three way and Four way

Question 29

control from one point

Answer 29

SPST

Question 30

control from three poibts

Answer 30

2 S3 and a S4

Question 31

control fro four or more points

Answer 31

2 s3 AND 2 OR OR MORE S4

Question 32

•                     generally control operation of lighting installations.

Answer 32

Single-pole, single-throw (S), Three-way (S3) and Fourway (S4) switches

Question 33

•                     can used to adjust brightness of a lighting installation by adjusting the current flowing through the circuit.

Answer 33

DIMMER SWITCHES

Question 34

•                     require a key to operate the switch. These are used where operation of a lighting installation or other piece of equipment must be further controlled by limiting operation to personnel holding a key such as in lighting in a high school gymnasium or large meeting room and equipment in a manufacturing plant.

Answer 34

KEY OPERATED SWITCHES

Question 35

deactivate a circuit after a preset time period has lapsed.

Answer 35

automatic switcheS

Question 36

•                     Available as a twist-turn device where the operator determines the operating time interval by how far the switch is twisted or as an electronic device that looks like a normal on/off switch but is designed to automatically switch off after a PRESET time.

Answer 36

automatic switcheS

Question 37

•   is a device in the electrical circuit for varying power to a circuit. •  are usually included in a lighting installation to vary the intensity of light emitted by the Lights 

Answer 37

dimmer switcheS

Question 38

can be used to CONTROL THE TIME period that a piece of equipment or a lighting installation operates.

Answer 38

time clocks

Question 39

•  allow greater flexibility as they can easily be set for 7day cycles. •  They do require relay switching on large loads.

Answer 39

electronic timerS

Question 40

•                     sense light and open or close a circuit with the presence of light. •                     They can be used to control night lighting in lieu of a time clock. •                     Recent advancements in photocell technology allow them to be used effectively to control illumination levels in spaces that have daylight available.

Answer 40

photocell controlS

Question 41

control a lighting or equipment installation by sensing occupants in a space. These are usually mounted on the wall or ceiling. 

Answer 41

occupancy sensorS

Question 42

respond to the motion of an infrared heat source, such as a person or animal.

Answer 42

infrared sensorS

Question 43

•                     emit a high-frequency sound that is in the range of "25" to "40" kilohertz and well above the capacity of normal human hearing. •                     they do not require a direct line of sight to the occupant.

Answer 43

ultrasonic sensorS

Question 44

Both ___________ and ____________ work well in interior spaces such as classrooms and offices.

Answer 44

infrared, ultrasonic sensors