PSI Online Practice Examination -Questions with Correct Answers/
Verified/ 100% Pass
Live parts of generators shall not be exposed to accidental contact where accessible to unqualified
operated persons if their voltage is greater than which of the following?
1. 30 volts to ground
2. 40 volts to ground
3. 50 volts to ground
4. 60 volts to ground - ✔️✔️445.14 Protection of Live Parts. Live parts of generators operated at
more than 50 volts to ground shall not be exposed to accidental contact where accessible to
unqualified persons.
Use of a higher class motor overload relay may preclude the need for which of the following?
1. a shunt
2. a separate controller circuit
3. a separate terminal enclosure
4. selection of a higher trip current - ✔️✔️
A panelboard for a mobile home shall be rated not less than which of the following?
1. 30 amperes
2. 40 amperes
3. 50 amperes
4. 60 amperes - ✔️✔️550.11 (A) Disconnecting Means. A panelboard shall be rated not less than 50
amperes....
The storage batteries used as a source of power for emergency system shall be of suitable rating and
capacity to supply and maintain the total load for a minimum of how long?
1. 45 minutes
2. 60 minutes
3. 75 minutes
4. 90 minutes - ✔️✔️III 700.12 (A) Storage Battery used as a source of power for emergency
systems shall be of suitable rating and capacity to supply and maintain the total load for a minimum
period of 1 1/2 hours. ( 4. 90 minutes)
,What is the permissible noise exposure limit for an 8-hour day that, if exceeded, requires hearing
protection to be provide? - ✔️✔️Cal/OSHA Table 3 Allowable Exposure Levels to Sound (page 103)
90dBA - 8 hours
For pool equipment, the disconnecting means for all ungrounded conductors shall be readily
accessible and within sight from its equipment and shall be located a minimum of how many feet
horizontally from the inside walls of a pool?
1. 5 feet
2. 6 feet
3. 8 feet
4. 10 feet - ✔️✔️680.12 Maintenance Disconnecting Means Each means shall be readily accessible
and within sight from its equipment and shall be located at least 1.5 m (5 ft.) horizontally from the
inside walls of a pool.
For other than a totally enclosed switchboard or switchgear, what is the minimum amount of space
that shall be provided between the top of an unshielded switchboard or switchgear and any
combustible ceiling?
1. 18 inches
2. 24 inches
3. 30 inches
4. 36 inches - ✔️✔️408.18(A) Clearances
From Ceiling. For other than a totally enclosed switchboard of switchgear, a space not less than
900mm (3 ft.) shall be provided between the top of the switchboard or switchgear and any
combustible ceiling
What is the minimum branch-circuit rating for ranges of 8-3/4 kW or more?
1. 20 amperes
2. 30 amperes
3. 40 amperes
4. 50 amperes - ✔️✔️210.19(A)(3) Household Ranges and Cooking Appliances. For ranges of 8-3/4
or more rating, the minimum branch-circuit rating shall be 40 amperes
Equipment grounding conductors of bare or insulated aluminum or copper-clad aluminum shall not
be terminated within how many inches of the earth?
1. 6 inches
, 2. 12 inches
3. 18 inches
4. 24 inches - ✔️✔️250.64(A) Aluminum or Copper-Clad Aluminum Conductors shall not be
terminated within 450mm (18 inches) of the earth.
Unless otherwise provided, MC cables shall be secured at intervals not exceeding which of the
following?
1. 6 feet
2. 8 feet
3. 10 feet
4. 12 feet - ✔️✔️330.30(B) 6 feet
A minimum of how many threads needs to be engaged if machine screws are used to fasten bonding
jumpers?
1. 2
2. 3
3. 4
4. 5 - ✔️✔️250.8(A)(5) Machine screw-type fasteners that engage not less than two threads or are
secured with a nut.
Disregarding exceptions, conductors used for direct burial applications shall be shielded if rated
above which of the following?
1. 600 volts
2. 1,000 volts
3. 1,200 volts
4. 2,000 volts - ✔️✔️310.10 (F) Direct-Burial Conductors Cables rated above 2000 volts shall be
shielded.
What is the required width of the working space in front of electrical equipment with a 22-inch
width?
1. 22 inches
2. 24 inches
3. 30 inches
Verified/ 100% Pass
Live parts of generators shall not be exposed to accidental contact where accessible to unqualified
operated persons if their voltage is greater than which of the following?
1. 30 volts to ground
2. 40 volts to ground
3. 50 volts to ground
4. 60 volts to ground - ✔️✔️445.14 Protection of Live Parts. Live parts of generators operated at
more than 50 volts to ground shall not be exposed to accidental contact where accessible to
unqualified persons.
Use of a higher class motor overload relay may preclude the need for which of the following?
1. a shunt
2. a separate controller circuit
3. a separate terminal enclosure
4. selection of a higher trip current - ✔️✔️
A panelboard for a mobile home shall be rated not less than which of the following?
1. 30 amperes
2. 40 amperes
3. 50 amperes
4. 60 amperes - ✔️✔️550.11 (A) Disconnecting Means. A panelboard shall be rated not less than 50
amperes....
The storage batteries used as a source of power for emergency system shall be of suitable rating and
capacity to supply and maintain the total load for a minimum of how long?
1. 45 minutes
2. 60 minutes
3. 75 minutes
4. 90 minutes - ✔️✔️III 700.12 (A) Storage Battery used as a source of power for emergency
systems shall be of suitable rating and capacity to supply and maintain the total load for a minimum
period of 1 1/2 hours. ( 4. 90 minutes)
,What is the permissible noise exposure limit for an 8-hour day that, if exceeded, requires hearing
protection to be provide? - ✔️✔️Cal/OSHA Table 3 Allowable Exposure Levels to Sound (page 103)
90dBA - 8 hours
For pool equipment, the disconnecting means for all ungrounded conductors shall be readily
accessible and within sight from its equipment and shall be located a minimum of how many feet
horizontally from the inside walls of a pool?
1. 5 feet
2. 6 feet
3. 8 feet
4. 10 feet - ✔️✔️680.12 Maintenance Disconnecting Means Each means shall be readily accessible
and within sight from its equipment and shall be located at least 1.5 m (5 ft.) horizontally from the
inside walls of a pool.
For other than a totally enclosed switchboard or switchgear, what is the minimum amount of space
that shall be provided between the top of an unshielded switchboard or switchgear and any
combustible ceiling?
1. 18 inches
2. 24 inches
3. 30 inches
4. 36 inches - ✔️✔️408.18(A) Clearances
From Ceiling. For other than a totally enclosed switchboard of switchgear, a space not less than
900mm (3 ft.) shall be provided between the top of the switchboard or switchgear and any
combustible ceiling
What is the minimum branch-circuit rating for ranges of 8-3/4 kW or more?
1. 20 amperes
2. 30 amperes
3. 40 amperes
4. 50 amperes - ✔️✔️210.19(A)(3) Household Ranges and Cooking Appliances. For ranges of 8-3/4
or more rating, the minimum branch-circuit rating shall be 40 amperes
Equipment grounding conductors of bare or insulated aluminum or copper-clad aluminum shall not
be terminated within how many inches of the earth?
1. 6 inches
, 2. 12 inches
3. 18 inches
4. 24 inches - ✔️✔️250.64(A) Aluminum or Copper-Clad Aluminum Conductors shall not be
terminated within 450mm (18 inches) of the earth.
Unless otherwise provided, MC cables shall be secured at intervals not exceeding which of the
following?
1. 6 feet
2. 8 feet
3. 10 feet
4. 12 feet - ✔️✔️330.30(B) 6 feet
A minimum of how many threads needs to be engaged if machine screws are used to fasten bonding
jumpers?
1. 2
2. 3
3. 4
4. 5 - ✔️✔️250.8(A)(5) Machine screw-type fasteners that engage not less than two threads or are
secured with a nut.
Disregarding exceptions, conductors used for direct burial applications shall be shielded if rated
above which of the following?
1. 600 volts
2. 1,000 volts
3. 1,200 volts
4. 2,000 volts - ✔️✔️310.10 (F) Direct-Burial Conductors Cables rated above 2000 volts shall be
shielded.
What is the required width of the working space in front of electrical equipment with a 22-inch
width?
1. 22 inches
2. 24 inches
3. 30 inches
