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NEC Master practice test 100% Correct!!

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If two 10-ohm resistors are connected in series, what is the total resistance of these resistors? - ANSWER20 ohms In a split-phase motor, how much greater is the starting current when compared to the full-load current? - ANSWER6 to 8 times The terminals of a motor can be identified using a batter...

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nec master practice test 100 correct
if two 10 ohm resistors are connected in series

Institution NEC Master
Course NEC Master

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NEC Master practice test 100%
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If two 10-ohm resistors are connected in series, what is the total resistance of these resistors? -
ANSWER20 ohms

In a split-phase motor, how much greater is the starting current when compared to the full-load
current? - ANSWER6 to 8 times

The terminals of a motor can be identified using a battery and a ___ - ANSWERvoltmeter

A 5-ohm and a 20-ohm resistor are connected in parallel. What is the total resistance of these two
resistors? - ANSWER4 ohms

The normal location to provide overcurrent protection in an electrical circuit is ___ - ANSWERwhere
the conductor receives its supply

Which factor determines the outcome of an electrical shock? - ANSWERThe amount of current

Isolated power systems are used to prevent ___ - ANSWERpower interruption

The speed of a three-phase squirrel cage induction motor is controlled by the frequency of the
applied voltage and ___ - ANSWERthe number of poles

Where insulating protective equipment may be damaged, it ___ - ANSWERrequires its own
protection (e.g., leather gauntlets over rubber gloves)

Individual branch circuits are not required for portable X-ray equipment requiring no more than ___ -
ANSWER60A

The type of rubber protective equipment that is made of natural rubber or a vulcanized synthetic is
___ - ANSWERType 1

Line isolation monitors must have a green signal lamp that glows when the system is isolated from
ground and located ____ - ANSWERso it is visible to staff in the anesthetizing location

Under strict safety guidelines, which of the following should be used to discharge capacitors before
working on de-energized circuits? - ANSWERA safety shorting probe

Which of the following motors is the best installation choice for an application requiring adjustable
speeds? - ANSWERShunt DC

To make sure the voltage is turned off before touching any terminals, use a ___ - ANSWERvoltage
tester

If you bend from the waist to pick up an object weighing 20 pounds, the amount of pressure applied
to your lower back is ___ - ANSWER200 pounds

In addition to the NEC, the emergency electrical power for hospitals is governed by the ___ -
ANSWERJoint Commission

,OSHA CFR 1910 is the standard for ______. - ANSWERgeneral industry

The most common conductors used for light and power installations range from ___ - ANSWER4/0 to
No. 14 AWG

A circuit has a source voltage of 50V and a current of 10A. What is the power in watts? - ANSWER500

What is the total resistance of a two-wire circuit that spans a distance of 200' each way if the
resistance per 1,000' is 1.21 ohms? - ANSWER0.484 ohm

The primary method of varying the speed on a DC shunt motor is to adjust the voltage and current
on the field winding or the ___ - ANSWERarmature

The normal beating heart can be upset by an electrical current as small as ___ - ANSWER75mA

A three-phase induction motor may have ___ - ANSWER2 poles

Which of the following motors provides constant speed from no-load conditions to full-load
conditions? - ANSWERSynchronous

If a circuit has 12 amps of current and the resistance is 20 ohms, the applied voltage is ___ -
ANSWER240 volts

The power factor of an induction motor at no-load conditions can be as low as ___ - ANSWER15%

To keep the voltage drop of a 277V circuit to a maximum of 3%, what would be the maximum
allowable voltage drop? - ANSWER8.3V

Which of the following must be considered when determining the size of the conductor required to
connect an electrical load to the source of supply? - ANSWERPermissible voltage drop

DC injection breaking is used on the ___ - ANSWERthe stationary windings of AC motors

According to NEMA definitions, which of the following is a type of open motor? - ANSWERWeather-
protected

A polyphase synchronous motor has three stator windings that are ___ - ANSWER120 degrees apart

The value indicated in rpm on the nameplate is the ___ - ANSWERrated full-load speed

In a medical facility, receptacles should be mounted ___ - ANSWER24" above the floor

Horsepower is used to rate the ___ - ANSWERoutput capacity of a motor

If a circuit has 48 amps of current and an applied voltage of 240 volts, the resistance is ___ -
ANSWER5 ohms

The NEC requires motor disconnecting means be ___ - ANSWERwithin sight of the controller location

What is the applied voltage if the current in a circuit is 60 amps and the resistance is 10 ohms? -
ANSWER600 volts

Which of the following substances is considered a good semiconductor? - ANSWERSilicon

If the resistance of a circuit is 25 ohms and the current is 10 amps, the power in watts is ___ -
ANSWER2,500

,Which of the following is used to step voltage down to lower levels before it reaches a home or
office? - ANSWERTransformer

The stationary magnet of a DC motor is represented by the ___ - ANSWERfield poles

For a constant-torque load, the horsepower increases and decreases ___ - ANSWERin direct
proportion to the speed

Any exposed live parts must be guarded if they are operating at ___ - ANSWER50V or more between
terminals

Which of the following motors is used when the required starting torque is high and speed control is
desirable? - ANSWERCompound

A correction factor must be applied if the ambient temperature is above ___ - ANSWER86 degrees
Fahrenheit

Health care facilities are often supplied by two or more distribution points; this is known as a ____ -
ANSWERspot network

What must happen before any work may be performed in a confined space? - ANSWERCompletion of
a hazard review

A delta-connected motor has ___ - ANSWER9 leads

The synchronous speed at which a four-pole, 60Hz induction motor operates is ___ - ANSWER1,800
rpm

According to NEMA definitions, which of the following is a type of totally enclosed motor? -
ANSWERwater-cooled

If a conductor has a diameter of 40 mils, what is the diameter in inches? - ANSWER0.04"

A typical constant-torque load would be a ___ - ANSWERconveyor

NFPA 70E provides practical guidance in______. - ANSWERelectrical hazard assessment

Attachment plugs and receptacles in hazardous locations must be listed for use in ____ -
ANSWERClass I, Group C locations

Which of the following should have side rails that extend 36 inches above the top support point? -
ANSWERStraight ladders

How many amps are there in the current of a circuit if the voltage source is 140V and the resistance
is 2 ohms? - ANSWER70 amps

Installation of X-ray equipment is governed by ____ - ANSWERNEC Article 517, Part V

Which of the following is most likely to use dynamic braking? - ANSWERForklift

If five No. 10 AWG current-carrying conductors are installed in a raceway where the ambient
temperature is 70 degrees Fahrenheit, the allowable ampacity must be ___ - ANSWERreduced by
80% of its value

The square mil area of a conductor that is 0.250" on all sides is ____ - ANSWER62,500 square mils

, You are required to be evaluated by a physician to ensure that you are physically fit to use which of
the following types of protective equipment? - ANSWERRespirator

Low voltage equipment that is typically in contact with patients must be moisture-resistant and
operate on ___ - ANSWER10V or less

Which of the following is true with regard to working near cranes? - ANSWEROnly individuals trained
in rigging should ever rig material for a lift.

Which of the following battery byproducts can be explosive when mixed with air? -
ANSWERHydrogen

Operating rooms must be provided with a minimum of ___ - ANSWER36 receptacles

Insulating gloves must be inspected by the user ______. - ANSWERbefore each use

Which motor should be used for applications that require frequent starts without overheating the
motor? - ANSWERWound rotor induction motor

In a parallel circuit, the voltage drop ___ - ANSWERis the same across all loads

When a guardrail cannot be attached to a building, a solution may be to install a ______. -
ANSWERcontrolled access zone

Which of the following supplies power to the areas that are directly related to patient care, including
emergency rooms and pharmacies? - ANSWERCritical branch

For safety, assume that any facility constructed before 1980 contains ______. - ANSWERasbestos

The OSHA lockout/tagout rule protects workers from ___ - ANSWERexposure to hazardous energy
sources

The physical properties of a No. 4/0 copper conductor would be found in ___ - ANSWERNEC Chapter
9, Table 8

Materials with electrical characteristics that fall between those of insulators and conductors are
considered ____ - ANSWERsemiconductors

How much of a correction factor is needed if the ambient temperature is 40 degrees Celsius? -
ANSWER0.82

A medium-size motor has a frame number of 284T. The D dimension of this motor is ___ - ANSWER7"

If the wooden handle on a tool is cracked, ___ - ANSWERtag the tool out of service and do not use it

Which of the following statements is true about Type MC cable in patient care spaces? -
ANSWERType MC cable with a health care facility rating must be used.

Correction factors for reductions due to high ambient temperatures are found in ___ - ANSWERNEC
Table 310.15(B)(2)(a) and (b)

Voltage is defined as the ___ - ANSWERforce that causes electrons to flow

The capacitor-start motor is the single-phase motor type that has the ____ - ANSWERhighest starting
torque

A No. 1 isolated conductor must be identified using which of the following colors? - ANSWEROrange

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