IEC Year 1 Midterm

Navigate it

As you learn about the NEC, you do not need to memorize it, but you will need to learn how to _.

Switch

Which of the following is NOT an “outlet”?

False

The code book is something each apprentice should attempt to memorize.

False

Chrome finished sockets designed for use with a socket wrench can also be safely used on an impact wrench.

False

Cheater bars can be safely used on a wrench to extend the length of the handle so that additional torque can be applied.

III only

Which of these PPEs are safety glasses?

All of these

Before using a reciprocating saw (“sawsall”), you should make sure that the blade is ___.

Pull

When applying high torque to a wrench, you should adjust your stance to avoid falling should the wrench slip and then ___ on the wrench handle.

e

Which of the following is a folding tape?

a torque wrench _.

is a calibrated tool to apply consistent measured rotational force

terminating the conductors in a residential meterbase requires the use of a calibrated torque tool.

True

a torque screwdriver and a torque wrench are examples of torque tools.

true

improper torque can cause _.

all of the above

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ would be used to identify respiratory tract irritants.

b - exclamation mark

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ would be used to identify acutely toxic (fatal) materials.

a - skull and crossbones

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ would be used to identify gases under pressure.

d - (wine-looking) bottle

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ is not mandatory.

f - fish

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ would be used to identify gases under pressure.

f - none of these

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ would be used to identify aspiration toxins.

c - silhouette with star-like detail in chest area

Match the following GHS pictograms to the health hazard it identifies.

Pictogram ___ would be used to identify skin corrosives.

e - beakers pouring chemicals on pipe and hand

GHS is an abbreviation for ___.

Globally Harmonized System

The new GHS is meant to provide ___ for all employees who are potentially exposed to hazardous chemicals in the workplace. This information is for employees to use to protect themselves from these hazards.

Both a and b - uniform labeling and hazard classification identification

As a GHS requirement, the Accidential Release Measures section on the SDS lists ___ required for cleanup.

d - all of these

What organization approves standards that then become recognized as American national standards?

b - ANSI

What NEC® article discusses the purpose and scope of the code?

Article 90

What organization actually develops and publishes the National Electrical Code®?

National Fire Protection Association

Unused openings in Boxes shall be closed. Find the code reference. The code reference for this is ___. (Always look for key words in the Index.)

110.12(A)

Explanatory material is represented throughout the Code using ___.

an Informational Note

The National Electrical Code® is a minimum ___ standard.

safety

How often is the NEC® revised and updated?

Every 3 years

The National Electrical Code® shows measurements in which system of units first?

SI (metric)

According to the NEC® Index, safety and examination of equipment is covered under Section ___.

90.7

If a Code rule is permitted but not mandatory, it includes the words ___.
  I.      shall not be required
 II.      not necessary
III.      shall be permitted

I or III only

In the NEC®, which article explains the general requirements for a receptacle outlet?

210.50

According to OSHA, what is the maximum number of days a cord can be in use as part of a temporary installation?

90 days

Most fabric in modern clothing is arc-rated.

false

The meaning of approved is ___.

acceptable to the authority having jurisdiction

According to the NEC® Index, definitions are found in what article?

100

Which of the following is not considered a math-based activity?

Turning a screwdriver

1.3 kV = ___ V

1,300

Current is measured in ___.

amperes

Electricians will use math each day in their profession

true

Electrons have a ___ charge.

negative

DC is an abbreviation for ___.

direct current

How would 13,800 volts be written in metric notation?

13.8 kV

Two particles that have opposite charges (one + and the other –) will ___ each other.

attract

AC is an abbreviation for ___.

Alternating Current

Which of these symbols is used to represent a battery?

b - positive and negative symbols between a “chasm”

___ is the force that causes current to flow.

voltage

Which materials listed below are good conductors? 
I.  copper               II.  air            III.  gold

d - I & III only

___ flow equals current flow.

Electron

Two particles that are both positively charged will ___ each other.

repel

.0101 A = ___ mA

10.1

23.5 V = ___ mV

23,500

.1234 A = ___ mA

123.4

.055 mA = ___ A

.000055

Finding the least common denominator helps us ___.

add fractions

112.3 V = ___ mV

112,300

.0000005 A = ___ µA

.5

In the international system of units, the prefix kilo- means ___.

thousand

An electrician has a gross pay of $396.00 and worked 44 hours. What is the hourly rate of pay for the electrician?

$9.00

The first year instructor of the Residential Electrical Specialist School has 37 new students signed up for the class. Each apprentice will receive 3 books. How many books will need to be ordered?

111

The electrical supply house delivered four loads of trade size ¹/₂ EMT. The first load had 5,400 feet of conduit, the second had 4,000 feet of conduit, the third load had 4,460 feet of conduit, and the fourth load had 2,240 feet of conduit. On average, the electricians on the job are installing 575 feet a day. It will take ___ days to install all of the conduit that was delivered.

28

How many 250-foot rolls of BX cable are needed if a job requires 5,750 feet?

23

The EPA fuel economy ratings for an electrical company’s trucks is 14 miles per gallon. At a cost of $3.19 per gallon, how much did the company have to pay for fuel if the total miles traveled for all its trucks was 71,736?

$16,345.56

An electrical contractor has a set of bins that is used for inventory in the warehouse. There are 12 bins across and 5 bins high. How many bins does he have for inventory?

60

Journeyman #1 drives 103 miles to work, journeyman #2 commutes 5 miles, and journeyman #3 drives 18 miles. Twenty apprentices drive a total of 1,460 miles. The total number of miles driven by all the journeymen and apprentice electricians is ___ miles.

1,586

The decimal equivalent of ⁷/₈ is ___.

.875

3 hours 20 minutes + 1 hour 48 minutes = ___ hours.

5.1

An electrical contractor purchased the following materials for a certain job: 2,500 feet of 12/2G Romex® for $321.30; 6-ceiling fans for $42.17 each; and 150 feet of EMT conduit for $.17 per foot. What is the total cost of these items?

$599.82

Rounded off to the nearest tenth, 103.49 is ___.

103.5

63.32 – 39.46 = ___.

23.86

A 1-inch motor shaft is worn down to a diameter of 0.9972 inch. The shaft has a difference in diameter of ___ inch from the original 1 inch.

0.0028

What is the sum of 347 + 28 + 1,049 + 13.5 + 6?

1,443.5

On your job, you are working 8-hour days. You are installing 32 light fixtures in those 8 hours. You make $11 per hour. How much per fixture does it cost your contractor to install each light fixture?

$2.75

The decimal equivalent of ⁵/₈ is ___.

.625

1" conduit costs $800 per 1,000 foot bundle. The cost of one 10 foot stick is ___.

$8

The abbreviation or symbol used to represent resistance in a formula is ___

R

When turned ON, a circuit breaker ___ the circuit.

closes

Which of the 250' long circuits below has the lesser resistance?

Circuit #2: uses 10 AWG wire

A circuit consists of a car battery, conductors, and a headlamp. If the filament in the headlamp breaks in two, the circuit is ___.

incomplete or open

Which of the following is a resistive load?
I.  a coffee maker          II.  an electric oven heating element

both I & II

A circuit is to be run to a parking lot light. The blueprints call for you to run 10 AWG wire that has a diameter of .116 inches. You, however, run 8 AWG wire that has a diameter of .128 inches. You have ___ the total circuit resistance.

decreased

Which circuit has a higher resistance during the summer? Both circuits have the same size wire, are the same length, and use the same conductor material.

Circuit #1 is run in conduit on the roof of a building.

Clean, dry air has a resistance of ___ ohms.

∞ infinite

According to the EWR specifications, the recommended maximum number of outlets that are to be connected to any one lighting branch circuit is ___.

10

Temporary lighting for this EWR house project is to be installed in accordance with ___.
I.  NEC® Article 590          II.  OSHA standards

Both I & II

On any project, the door swing is very important in selecting where to put your switches. Door swing should always be determined by referring to the ___ plans

architectural

Generally, no more than ___ outlets can be connected to any one 20-amp, 120-volt circuit in this EWR dwelling.

10

The symbol H is used to represent a ___ on the EWR plan legend.

heat alarm

Both EWR Plan 9 and the specifications require that spare conduits be installed between the attic and the workshop. However, these requirements differ. Although an RFI (Request for Information) would be the correct action, you should install the conduits as required ___ because the sheetrock is being installed immediately.

in the specs

For the electrical installation below the joists in the EWR workshop, ___ may be used.

either a or b emt-protected nm cable / emt

In the EWR bathroom on this project, ___ device cover plates are required.

ivory

Refer to the door schedule on the EWR plans. The front door of the residence is ___ high.

6'-8"

Refer to the EWR plans. The symbol shown below is used on Drawing 2/10 and represents a sectional view of the house. This view is shown on Drawing 7/10. What room is behind the brick wall on the left of the A-A sectional view?

garage

Three 6" × 6" and two 8" × 8" electrical boxes are installed in a wall between two studs. There are ___ square inches of wall area taken up by the boxes.

300

A square-shaped warehouse has a floor area of 12,769 square feet. The length of one of the walls is ___ feet.

113

The NEC® permits 20% of the cross-sectional area in a wireway to be occupied by conductors. For an 8" × 8" × 6' long wireway, the conductors can occupy ___ in².

921.6

72² = ___.

5,184

33² = ___.

1,089