Journeyman Electrician Practice Test 32

Question 1: Which of the following is the maximum number of receptacles permitted on a 15-ampere breaker supplied by a normal 120 volts power source in a retail shop?

• 10
• 8
• 9
• 12

NEC Reference: NEC 220.14(I)

Question 2: Which of the following is the total load of a 2500 sq ft dwelling unit that has 20 receptacles and 15 luminaries each rated 100w?

• 7500 Volt-Amperes
• 11000 Volt-Amperes
• 9500 Volt-Amperes
• 12000 Volt-Amperes

NEC Reference: NEC 220.14

Question 3: If the circuits are rated more than 20 amperes,  the fluorescent luminaries cannot be installed on circuits?

• True
• False

Question 4: The overload protection of the equipment is rated at 25 A which of the following conductor shall be used?

• No 16 AWG Copper
• No 14 AWG Copper
• No 18 AWG Copper
• No 12 AWG Copper

Question 5: An electric circuit has an over current device rated at 1170 A using three sets of conductors with one per each phase. what is the minimum size of that can be used?

• 600 kcmil copper
• 500 kcmil copper
• 400 kcmil copper
• 700 kcmil copper

NEC Reference: NEC 310.15(B)(16)

Question 6: What is the general phase angle between primary and secondary of a transformer?

• 180 ⁰
• 90 ⁰
• 270 ⁰
• 45 ⁰

Question 7: A three phase 4 wire electrical system phase to phase voltage is 480 Volts. what is its phase to neutral voltage?

• 480 volts
• 240 volts
• 277 volts
• 377 volts

Question 8: How many joules of energy will a 20 W Lamp dissipates in 5 minutes?

• 6000 joules
• 100 joules
• 4 joules
• 1500 joules

Question 9: What is the minimum time that a fuel cell system should supply emergency power in-case of normal power failure?

• 1
• 1/2
• 2
• 2 1/2

Question 10: A single phase motor full load current is 28 A, What is its over current device rating in amperes?

• 30 A
• 35
• 40
• 45

NEC Reference: NEC 32.2