3rd year first semester midterm UPDATED
ACTUAL Exam Questions and CORRECT
Answers
One of the most important goals of the multi employer worksite policy from OSHA is to ensure
that - CORRECT ANSWER - good communication occurs between the contractors working
on the site
It is not required to verify that a circuit or equipment has been deenergized as long as all of the
other steps of the lockout tagout have been performed T/F - CORRECT ANSWER - false
which of the following are considered to be current carrying conductors?
i.neutral conductor
ii. ungrounded conductor
iii. grounded conductor - CORRECT ANSWER - i and ii only
Potential difference refers to which of the following? - CORRECT ANSWER - voltage
If two points in a circuit have a voltage between them but are then bonded together with a
conductive jumper, there is no longer
i.voltage
ii.a difference in potential - CORRECT ANSWER - i and ii
potential difference is a value measured in ____? - CORRECT ANSWER - volts
In terms of grounding, the earth is considered to represent______/ - CORRECT ANSWER -
zero potentail
,Grounding conductor is an NEC definition that generally covers many different concepts and
parts of a grounding system. T/F - CORRECT ANSWER - true
A solidly grounded system is one where one of the current carrying conductors is intentionally
connected to the earth. T/F - CORRECT ANSWER - true
When a piece of equipment is connected to the earth it meets the definition for _____. -
CORRECT ANSWER - grounded
A ______ conductor is used to connect something to ground. - CORRECT ANSWER -
grounding
Proper equipment grounding eliminates voltage that might cause an electric shock by ______. -
CORRECT ANSWER - eliminating potential differences between metal enclosures
The most common configuration for a grounded three phase ac distribution system is four wire
center grounded. The code requirements for identification of an equipment grounding conductor
are provided in Section _____ - CORRECT ANSWER - 250.119
Total opposition to the flow of electric current is called resistance in a dc circuit and _____ in an
ac circuit. - CORRECT ANSWER - impedance
Which of the following are measured in ohms
i. inductive reactance
ii. capacitive reactance
iii. counter electromotive force - CORRECT ANSWER - i and ii only
When AC current passes through a circuit conductor or a connected load, it creates _____ that
creates a voltage in the circuit that actually opposes the applied voltage. - CORRECT
ANSWER - pure resistance
, When current passes through a conductor a magnetic field is created around the conductor. when
individual circuit conductors are either in close proximity or contained in the same cable or
conduit, these magnetic fields cancel each other because the currents in each conductor are not in
phase with one another. T/F - CORRECT ANSWER - true
Although air is a good insulator, ionized air is conductive and helps to sustain arcs when an
electrical are causes the air to be ionized. T/F - CORRECT ANSWER - true
Loose connections in a circuit conductor cause arcing and in turn oxidation occurs at the
connection. The circuit is connected to a single load. The voltage at the load will be _____ with
the poor connection in the circuit. - CORRECT ANSWER - Less
All NEC grounding requirements are covered in article 250. T/F - CORRECT ANSWER -
false
When a ground fault occurs in a 277 volt branch circuit the fault current must travel through the
_____ to get back through the OCPD to cause it to open. The 277-volt circuit originates in a
480/277volt 3 phase 4 wire service panelboard.
i. equipment grounding conductor.
ii. main bonding jumper.
iii. utility neutral conductor - CORRECT ANSWER - i and ii only
A 120 volt circuit is installed in EMT without a separate EGC. The circuit originates in a
120/208 volt 3 phase 4 wire panelboard. to cause the OCPD to operate, when a ground fault
occurs in the branch circuit the fault current must travel through the system or main bonding
jumper. T/F - CORRECT ANSWER - true
During ground faults, electrons seek to return to
i. ground
ii. the source of the power - CORRECT ANSWER - ii only
ACTUAL Exam Questions and CORRECT
Answers
One of the most important goals of the multi employer worksite policy from OSHA is to ensure
that - CORRECT ANSWER - good communication occurs between the contractors working
on the site
It is not required to verify that a circuit or equipment has been deenergized as long as all of the
other steps of the lockout tagout have been performed T/F - CORRECT ANSWER - false
which of the following are considered to be current carrying conductors?
i.neutral conductor
ii. ungrounded conductor
iii. grounded conductor - CORRECT ANSWER - i and ii only
Potential difference refers to which of the following? - CORRECT ANSWER - voltage
If two points in a circuit have a voltage between them but are then bonded together with a
conductive jumper, there is no longer
i.voltage
ii.a difference in potential - CORRECT ANSWER - i and ii
potential difference is a value measured in ____? - CORRECT ANSWER - volts
In terms of grounding, the earth is considered to represent______/ - CORRECT ANSWER -
zero potentail
,Grounding conductor is an NEC definition that generally covers many different concepts and
parts of a grounding system. T/F - CORRECT ANSWER - true
A solidly grounded system is one where one of the current carrying conductors is intentionally
connected to the earth. T/F - CORRECT ANSWER - true
When a piece of equipment is connected to the earth it meets the definition for _____. -
CORRECT ANSWER - grounded
A ______ conductor is used to connect something to ground. - CORRECT ANSWER -
grounding
Proper equipment grounding eliminates voltage that might cause an electric shock by ______. -
CORRECT ANSWER - eliminating potential differences between metal enclosures
The most common configuration for a grounded three phase ac distribution system is four wire
center grounded. The code requirements for identification of an equipment grounding conductor
are provided in Section _____ - CORRECT ANSWER - 250.119
Total opposition to the flow of electric current is called resistance in a dc circuit and _____ in an
ac circuit. - CORRECT ANSWER - impedance
Which of the following are measured in ohms
i. inductive reactance
ii. capacitive reactance
iii. counter electromotive force - CORRECT ANSWER - i and ii only
When AC current passes through a circuit conductor or a connected load, it creates _____ that
creates a voltage in the circuit that actually opposes the applied voltage. - CORRECT
ANSWER - pure resistance
, When current passes through a conductor a magnetic field is created around the conductor. when
individual circuit conductors are either in close proximity or contained in the same cable or
conduit, these magnetic fields cancel each other because the currents in each conductor are not in
phase with one another. T/F - CORRECT ANSWER - true
Although air is a good insulator, ionized air is conductive and helps to sustain arcs when an
electrical are causes the air to be ionized. T/F - CORRECT ANSWER - true
Loose connections in a circuit conductor cause arcing and in turn oxidation occurs at the
connection. The circuit is connected to a single load. The voltage at the load will be _____ with
the poor connection in the circuit. - CORRECT ANSWER - Less
All NEC grounding requirements are covered in article 250. T/F - CORRECT ANSWER -
false
When a ground fault occurs in a 277 volt branch circuit the fault current must travel through the
_____ to get back through the OCPD to cause it to open. The 277-volt circuit originates in a
480/277volt 3 phase 4 wire service panelboard.
i. equipment grounding conductor.
ii. main bonding jumper.
iii. utility neutral conductor - CORRECT ANSWER - i and ii only
A 120 volt circuit is installed in EMT without a separate EGC. The circuit originates in a
120/208 volt 3 phase 4 wire panelboard. to cause the OCPD to operate, when a ground fault
occurs in the branch circuit the fault current must travel through the system or main bonding
jumper. T/F - CORRECT ANSWER - true
During ground faults, electrons seek to return to
i. ground
ii. the source of the power - CORRECT ANSWER - ii only
