PSI Online Practice
Examination Correct
100%
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 - ANSWER 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 - ANSWER 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? - ANSWER 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 - ANSWER 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.
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 - ANSWER 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
4. 33 inches - ANSWER 110.26(A)(2) The width of the working space in front of the electrical equipment
shall be the width of the equipment or 30 inches, whichever is greatest.
Receptacles in residential units shall be installed such that no point measured horizontally along the
floor line of any wall space is more than how far from a receptacle outlet?
1. 6 feet
2. 8 feet
3. 10 feet
, 4. 12 feet - ANSWER 210.52(A)(1) Receptacles shall be installed such that no point measured horizontally
along the floor line of any wall space is more than 1.8m (6 ft.) from a receptacle outlet.
What is the minimum permitted branch circuit overcurrent protection for a 240-volt, 5,000-watt, 60-
gallon water heater?
1. 20 amperes
2. 25 amperes
3. 30 amperes
4. 35 amperes - ANSWER 5,000/240= 20.8 x 1.25%=26.04 Therefore: 3. 30 amperes
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 - ANSWER 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 - ANSWER 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
Examination Correct
100%
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 - ANSWER 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 - ANSWER 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? - ANSWER 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 - ANSWER 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.
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 - ANSWER 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
4. 33 inches - ANSWER 110.26(A)(2) The width of the working space in front of the electrical equipment
shall be the width of the equipment or 30 inches, whichever is greatest.
Receptacles in residential units shall be installed such that no point measured horizontally along the
floor line of any wall space is more than how far from a receptacle outlet?
1. 6 feet
2. 8 feet
3. 10 feet
, 4. 12 feet - ANSWER 210.52(A)(1) Receptacles shall be installed such that no point measured horizontally
along the floor line of any wall space is more than 1.8m (6 ft.) from a receptacle outlet.
What is the minimum permitted branch circuit overcurrent protection for a 240-volt, 5,000-watt, 60-
gallon water heater?
1. 20 amperes
2. 25 amperes
3. 30 amperes
4. 35 amperes - ANSWER 5,000/240= 20.8 x 1.25%=26.04 Therefore: 3. 30 amperes
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 - ANSWER 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 - ANSWER 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
