Deck 8: Load Calculations

Question 1

The ____, including the strip heat and blower motor, is necessary information for calculating loads.

A) heat sink percentage
B) total wattage in kilo-watts
C) total volt-ampere load
D) British Thermal Units (BTUs)

Answer 1

C

Question 2

____ is not an important piece of information to gather before performing load calculations.

A) The dwelling's total square-foot (ft²) area
B) How many laundry circuits will be installed
C) What fastened-in-place appliances will be installed
D) The location of circuit breakers

Answer 2

D

Question 3

A scale ruler is used in ____.

A) determining the number of outlets
B) measuring blueprint scales
C) determining the location of outlets
D) converting units

Answer 3

C

Question 4

Multiplying voltage by amperage produces ____.

A) kilo-volts (kV)
B) kilo-watts (kW)
C) kilo-amperes (kA)
D) volt-amperes (VA)

Question 5

Load calculations must be performed in order to determine the ____.

A) size of circuit breakers
B) size of services and feeders
C) voltage drop across all circuits
D) placement of fuse boxes

Question 6

____ must be included when calculating a dwelling unit service.

A) Detached garage space loads
B) Crawl space branch circuits
C) Refrigeration equipment loads
D) Small-appliance branch circuits

Question 7

____ are not included in the calculated floor area of dwelling units.

A) Kitchen spaces
B) Laundry/utility rooms
C) Open porches
D) Roofed overhangs

Question 8

No derating is allowed when there are only one, two, or three ____ appliances.

A) kitchen
B) laundry
C) fastened-in-place
D) small

Question 9

Individual household cooking appliances rated more than ____ watts (volt-amperes) can be derated by using demand factors.

A) 1000
B) 1250
C) 1500
D) 1750

Question 10

A feeder is defined as all circuit conductors between the ____ containing fuses or breakers that feed branch circuits.

A) main power source and the junction box
B) service disconnecting means and the panelboard
C) fuse box
D) auxiliary service line and the panelboard

Question 11

The ____ for each floor shall be computed using the outside dimensions.

A) lighting load
B) residential space
C) load capacity
D) floor area

Question 12

A demand factor of ____% can be applied to the nameplate rating load of four or more fastened-in-place appliances.

A) 35
B) 50
C) 65
D) 75

Question 13

The smaller of two (or more) ____ loads can be omitted, as long as they are never energized simultaneously.

A) noncoincident
B) nonsingular
C) incidental
D) compressor

Question 14

For the purpose of this load calculation, the terms neutral and ____ are synonymous.

A) load balanced
B) grounded
C) non-positive
D) charged

Question 15

A clothes dryer neutral load on a feeder can be calculated at ____%.

A) 20
B) 50
C) 70
D) 75

Question 16

Horsepower ratings must be converted to ____ before they can be added to the load calculation form.

A) kilo-volts (kV)
B) kilo-watts (kW)
C) volt-amperes (VA)
D) kilo-amperes (kA)

Question 17

The term appliance designates ____ and installed as a unit to perform specific function(s).

A) any ancillary equipment with a detachable plug
B) laundry equipment or devices
C) utilization equipment commonly built in standardized types and sizes
D) kitchen equipment or devices

Question 18

Each laundry branch circuit is calculated at _____.

A) no more than 1500 volt-amperes
B) no less than 1500 volt-amperes
C) no more than 1000 volt-amperes
D) no less than 1000 volt-amperes

Question 19

The lighting load for residential dwelling units is ____ volt-amperes (VA) per square foot.

A) 3
B) 6
C) 9
D) 12

Question 20

A dwelling unit must have at least ____ small-appliance branch circuit(s).

A) one
B) two
C) three
D) four

Question 21

In outdoor applications, ____ grounding electrode conductors must not be installed within 18 in. of the earth.

A) steel or stainless
B) cooper-clad
C) aluminum (or copper-clad aluminum)
D) composite

Question 22

The exact nameplate rating of the clothes dryer, even if less than ____ volt-amperes should be used in load calculations.

A) 1000
B) 2500
C) 5000
D) 7000

Question 23

The minimum size grounding electrode conductor is ____ AWG copper (or 2 AWG aluminum).

A) 2
B) 4
C) 6
D) 8

Question 24

____ are not included in calculating receptacle loads.

A) Heating and air-conditioning systems
B) Kitchen appliances
C) Branch appliance circuits
D) Media outlets

Question 25

A dwelling unit must have at least____ small-appliance branch circuits.

A) one
B) two
C) three
D) four