IEC YEAR 1,YEAR 2, YEAR 3 AND YEAR 4 FINAL EXAM BUNDLE NEWEST ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
1 | P a g e
IEC YEAR 4 FINAL EXAM NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 350 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
No receptacle shall ever be permitted to be installed within _ feet of the inside walls of a pool. Select one: a. 20 b. 18 c. 6 d. 15 – ANSWER- c. 6 No luminaires shall be installed in swimming pools for operation on supply circuits over _ volts between conductors.
Select one:
a. 150
b. 30
c. 300
d. 50
e. 130 – ANSWER- a. 150
2 | P a g e
A branch circuit is supplying a single hermetic refrigerant motorcompressor for an air conditioning unit. The hermetic refrigerant motorcompressor rated-load current is 18 amperes. If a 30-ampere fuse will
not start the motor-compressor, the maximum rating of the branchcircuit short-circuit and ground-fault protective device may be increased
to . Select one: a. 45 amps b. 35 amps c. 50 amps d. 40 amps – ANSWER- d. 40 amps Determine the minimum copper THHN conductor size required to connect a 15 KVAR, 480-volt, three-phase capacitor bank to a 50 hp, three-phase motor. Select one: a. 10 AWG b. 14 AWG c. 12 AWG d. 8 AWG e. 6 AWG – ANSWER- a. 10 AWG The wiring of an outdoor sign that is portable or mobile and is in a wet location shall be .
Select one:
3 | P a g e
a. protected by a 20-ampere overcurrent protective device
b. provided with ground-fault circuit-interrupter protection for personnel
c. provided with factory-installed ground-fault circuit-interrupter
protection for personnel
d. none of the these – ANSWER- c. provided with factory-installed
ground-fault circuit-interrupter protection for personnel
The maximum number of 15-amp receptacles permitted on a
freestanding office partition is . Select one: a. 6 b. 13 c. 2 d. 10 – ANSWER- b. 13 Conductors that supply one or more arc welders shall be protected by an overcurrent device rated or set at not more than % of the conductor
ampacity.
Select one:
a. 70
b. 200
c. 125
d. 50
e. 80 – ANSWER- b. 200
4 | P a g e
For PV systems, conductor ampacities must be correct if installed in
ambient temperatures exceeding °F. Select one: a. 83 b. 78 c. 71 d. 86 – ANSWER- d. 86 A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a voltage over volts
dc.
Select one:
a. 100
b. 60
c. 50
d. 30 – ANSWER- b. 60
Automatic transfer switches (ATS) for emergency systems shall be
electrically operated and _ held.
Select one:
a. mechanically
b. manually
c. automatically
d. pneumatically
get pdf at https://learnexams.com/search/study?query=
1 | P a g e
IEC YEAR 3 FINAL EXAM NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 500 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
Each employee required to work in ranks, , and similar storage areas shall be equipped with peronal fall-arrest equipment. I. hoppers II. silos Select one: a. I only b. II only c. either I or II d. neither I nor II – ANSWER- either hoppers or silos Storage areas shall be kept free from accumulation of that constitute
hazards from tripping, fire, explosion, or pest harborage.
Select one:
a. 5′ stacks of lumber
b. lunch trash
c. 4′ brick stacks
d. all of these – ANSWER- lunch trash?
2 | P a g e
Maximum safe load limits of floors within building and structures, in
pounds per square foot, shall be . Select one: a. recorded in the HazCom Manual b. conspicuously posted c. measured daily – ANSWER- conspicuously posted OSHA regualtion CFR1926.250 covers materials handling .
I. storage II. use III. disposal
Select one:
a. I only
b. I, II & III
c. III only
d. II only – ANSWER- Storage, use & disposal
A manual reversing starter is an assembly that includes _ and a
mechanical interlock.
I. 2 contactors II. 2 OL sections
III. 1 contactor IV. 1 OL section
Select one:
3 | P a g e
a. I & II
b. II & III
c. I & IV
d. III & IV – ANSWER- 2 contactors, 1 OL section
A manual reversing starter requires _ OL section(s). Select one: a. one b. two – ANSWER- two Internal drum switch connections are made between terminals 5 and 6 when the switch is in the position.
Select one:
a. Forward
b. Reverse
c. both a and b
d. neither a nor b – ANSWER- Forward and Reverse
The control switching for a reversing starter can consist of __.
Select one:
4 | P a g e
a. a stop PB, a start PB, and a forward/reverse selector switch
b. a stop PB, a forward PB, and a reverse PB
c. either a or b
d. neither – ANSWER- either a or b
Highway construction fatalities rarely include instances of workers
being struck by moving vehicles.
Select one:
a. True
b. False – ANSWER- False
Between 2003-2017 there were __ deaths in highway construction in the U.S. Select one: a. 1,311 b. 66,690 c. 131,300 d. 1,844 – ANSWER- 1,844 Over a period of recent years, there has been a(n) in the number of
highway construction projects.
get pdf at https://learnexams.com/search/study?query=
1 | P a g e
IEC YEAR 2 FINAL EXAM NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 350 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
What is the maximum allowable voltage between conductors on
a branch circuit supplying lighting fixtures (luminaires) in a
residence? – ANSWER- 120 volts
What is the minimum number of 20-ampere branch circuits for
small appliances required in a residence? – ANSWER- 2
Branch circuits that serve a _ are required to be rated at 20 amperes where installed in a house. – ANSWER- a.bathroom b.kitchen c.laundry room d.all of the above (correct) Branch circuits are rated according to _. – ANSWER- the
ampere rating of the overcurrent device
2 | P a g e
Refer to the Article 100 definition for continuous load in the
NEC®. According to 210.19(A) the branch-circuit conductors
for a continuous load shall be sized at not less than _ of the current drawn by the load. – ANSWER- 125% The smallest permissible wire size for branch circuit conductors supplying other than cooking appliances is AWG according
to the NEC®. – ANSWER- 14
When several receptacles are connected to a 20-ampere branch
circuit, these receptacles are required to be rated . – ANSWER- 15 or 20 amperes A -amp circuit breaker is the largest that can be installed on
a 12 AWG copper circuit conductor. The circuit is connected to
several receptacles. – ANSWER- 20
When a single receptacle is connected to a branch circuit (the
circuit has no other loads), the receptacle must have an ampere
rating the ampere rating of the OCPD protecting the branch circuit. – ANSWER- greater than or equal to Branch circuits are rated according to their _. – ANSWERovercurrent protective device rating
3 | P a g e
The maximum permitted current rating of a portable appliance
on a 30-ampere branch circuit is _ amps. – ANSWER- 24 What is the minimum size THHN/THWN wire permitted to serve a load that will draw 47 amps? The load will operate for about 5 hours at a time. The branch-circuit OCPD is a circuit breaker that is rated for 75°C. – ANSWER- 6 AWG` In a dwelling, a living room branch circuit with a 20-ampere rating can be loaded to a maximum of amperes. –
ANSWER- 20
Fastened-in-place utilization equipment that is connected to a
branch circuit with other loads shall not exceed __ percent of
the branch circuit rating. – ANSWER- 50
Along a kitchen countertop in a restaurant, the maximum
spacing between receptacles is . – ANSWER- not specified Receptacles in a finished basement must be installed such that no point measured horizontally along the floor line of any wall space is more than feet from a receptacle outlet. –
ANSWER- 6
4 | P a g e
Refer to Figure 108.014. This kitchen is in a house and width of
the countertop where receptacle 9 is located is 13″. Is receptacle
9 required by the NEC®? – ANSWER- yes
Where fixed glass panels (i.e., windows or non-sliding parts of
doors) do not permit installation of wall-mounted receptacles,
_ are typically used to satisfy the receptacle spacing requirements of NEC® 210.52(A)(1) and (2). – ANSWERfloor-mounted receptacles In a dwelling, what is the minimum width of a wall space that requires a receptacle outlet? – ANSWER- 2 feet In a house receptacles should be installed along a 15-foot
long kitchen countertop per the minimum requirements in the
NEC®. – ANSWER- 4
The plan view for the kitchen countertops in a house is shown in
Figure 108.013. The fewest number of receptacles that can be
installed along the 7′-9″ & 7′-1″ countertops is __. –
ANSWER- 4
A 23-foot long hallway is shown above in Figure 108.020. If
this hallway is in the Mayor’s house, how many wall receptacles
are required by the NEC®? – ANSWER- at least one
get pdf at https://learnexams.com/search/study?query=
1 | P a g e
IEC YEAR 2 FINAL EXAM NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 350 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
What is the maximum allowable voltage between conductors on
a branch circuit supplying lighting fixtures (luminaires) in a
residence? – ANSWER- 120 volts
What is the minimum number of 20-ampere branch circuits for
small appliances required in a residence? – ANSWER- 2
Branch circuits that serve a _ are required to be rated at 20 amperes where installed in a house. – ANSWER- a.bathroom b.kitchen c.laundry room d.all of the above (correct) Branch circuits are rated according to _. – ANSWER- the
ampere rating of the overcurrent device
2 | P a g e
Refer to the Article 100 definition for continuous load in the
NEC®. According to 210.19(A) the branch-circuit conductors
for a continuous load shall be sized at not less than _ of the current drawn by the load. – ANSWER- 125% The smallest permissible wire size for branch circuit conductors supplying other than cooking appliances is AWG according
to the NEC®. – ANSWER- 14
When several receptacles are connected to a 20-ampere branch
circuit, these receptacles are required to be rated . – ANSWER- 15 or 20 amperes A -amp circuit breaker is the largest that can be installed on
a 12 AWG copper circuit conductor. The circuit is connected to
several receptacles. – ANSWER- 20
When a single receptacle is connected to a branch circuit (the
circuit has no other loads), the receptacle must have an ampere
rating the ampere rating of the OCPD protecting the branch circuit. – ANSWER- greater than or equal to Branch circuits are rated according to their _. – ANSWERovercurrent protective device rating
3 | P a g e
The maximum permitted current rating of a portable appliance
on a 30-ampere branch circuit is _ amps. – ANSWER- 24 What is the minimum size THHN/THWN wire permitted to serve a load that will draw 47 amps? The load will operate for about 5 hours at a time. The branch-circuit OCPD is a circuit breaker that is rated for 75°C. – ANSWER- 6 AWG` In a dwelling, a living room branch circuit with a 20-ampere rating can be loaded to a maximum of amperes. –
ANSWER- 20
Fastened-in-place utilization equipment that is connected to a
branch circuit with other loads shall not exceed __ percent of
the branch circuit rating. – ANSWER- 50
Along a kitchen countertop in a restaurant, the maximum
spacing between receptacles is . – ANSWER- not specified Receptacles in a finished basement must be installed such that no point measured horizontally along the floor line of any wall space is more than feet from a receptacle outlet. –
ANSWER- 6
4 | P a g e
Refer to Figure 108.014. This kitchen is in a house and width of
the countertop where receptacle 9 is located is 13″. Is receptacle
9 required by the NEC®? – ANSWER- yes
Where fixed glass panels (i.e., windows or non-sliding parts of
doors) do not permit installation of wall-mounted receptacles,
_ are typically used to satisfy the receptacle spacing requirements of NEC® 210.52(A)(1) and (2). – ANSWERfloor-mounted receptacles In a dwelling, what is the minimum width of a wall space that requires a receptacle outlet? – ANSWER- 2 feet In a house receptacles should be installed along a 15-foot
long kitchen countertop per the minimum requirements in the
NEC®. – ANSWER- 4
The plan view for the kitchen countertops in a house is shown in
Figure 108.013. The fewest number of receptacles that can be
installed along the 7′-9″ & 7′-1″ countertops is __. –
ANSWER- 4
A 23-foot long hallway is shown above in Figure 108.020. If
this hallway is in the Mayor’s house, how many wall receptacles
are required by the NEC®? – ANSWER- at least one
get pdf at https://learnexams.com/search/study?query=
1 | P a g e
IEC YEAR 1 FINAL EXAM NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 200 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
How many kW does a 100-ampere residential service draw when fully
loaded?
a.10 kW
b.240 kW
c.100 kW
d.24 kW – ANSWER- d. 24kW
100A x 240V = 24,000 W OR 24kW
If a 95-watt lamp operates for 11 hours, the utility will bill for _ kWh.
a.8.636
b.10.450
c.11.579
d.1.045
e.1.158 – ANSWER- d. 1.045
2 | P a g e
95W x 11hrs = 1045-watt-hours
1045/1000 = 1.045 kWh
What is the monthly energy cost to operate a 200-watt high-pressure
sodium lamp? Electricity costs $0.11 per kW-hr and the lamp will be
ON for 12 hours per day. There are 30 days in a billing month.
a.$7.92
b.$8.80
c.$15.94
d.$6.60
e.$660 – ANSWER- a. $7.92
200W x 12hrs x 30 days = 72,000
72,000/1000 = 72kWh
0.11 x 72kWh = $7.92
To minimize conductor insulation damage and arcing damage to
electrical equipment during a ground fault or a short circuit, _ should
be minimized.
a.time duration of the fault
b.ampere level of the fault current
3 | P a g e
c.both a and b
d.neither a nor b – ANSWER- a. time duration of the fault
Self-tapping sheet metal screws (TEK screws) _ permitted to be used
to connect the equipment grounding conductor to a metal box. –
ANSWER- Are Not
According to Article 250, a metal underground water pipe that is in
direct contact with the earth for 10 ft. or more (including any metal well
casing effectively bonded to the pipe) and electrically continuous (or
made electrically continuous by bonding around insulating joints or
insulating pipe) to the points of connection of the grounding electrode
conductor and the bonding conductors would be a good . a.insulator b.service conductor c.grounding electrode d.neutral – ANSWER- c. grounding electrode If connected to a metal water piping system, the grounding electrode conductor shall be connected at some point within the first of where
it enters the building.
a.25 ft (7.5 m)
b.10 ft (3.0 m)
c.5 ft (1.52 m) – ANSWER- c. 5 ft (1.52 m)
4 | P a g e
When determining the minimum size of a grounding electrode
conductor, Table _ is used. a.250.122 b.310.15(B)(16) c.250.66 d.314.16(A) e.none of these – ANSWER- c. 250.66 The grounding blade on an attachment plug is than the currentcarrying conductor blades. This is to ensure that the grounding
connection is made before the current-carrying conductor connections
and breaks its connection after the current-carrying conductor
connections (first make-last break).
a.more durable
b.longer
c.larger
d.tarnish-resistant – ANSWER- b. longer
An equipment grounding conductor (EGC) is the conductor that is __.
a.installed with the branch-circuit conductors in a conduit or cable run
get pdf at https://learnexams.com/search/study?query=