Journeyman Electrician Practice Test 11

Question 1: If two ends of 1000 ft No.10 Aluminum AWG wire are connected to 240 V electrical source, What will be the current flows in the circuit?

• 40 Amperes
• 24 Amperes
• 120 Amperes
• 240 Amperes

Question 2: The Power factor in an electrical circuit is

• Actual power / Apparent Power
• Apparent Power/Actual power

Question 3: What is the maximum voltage drop in a branch circuit conductors at the farthest outlet is ..............

• 3%
• 2%
• 5%
• 8%

Question 4: In an electric circuit doubling the voltage reduces the voltage drop in volts exactly ...........%, if the wire size, power and distance are unchanged.

• 100%
• 200%
• 50%
• 150%

Question 5: Any size of the wire will carry any given amount of power in watts at 240 volts ......... times as far as it will at 120 volts.

• two
• four
• three

Question 6: The following quantity is measured using tachometer ?

• speed
• torque
• force
• pressure

Question 7: If the distance between two capacitive plates is decreased, the capacitance ....................

• Decreases
• Increases

Question 8: The maintenance of squirrel cage induction motor is less compared to DC Motor.

• false
• True

Question 9: The motor operating at a voltage 10% lower than normal will deliver only ........% of its normal power.

• 81
• 90
• 85
• 91

Question 10: A 5hp motor having a service factor of 1.15 can be used continuously as a .........................  HP motor.

• 5.75
• 4.25
• 5.25
• 4.75

Question 11: Where live parts are exposed on front side of electrical equipment, what shall be the minimum working space provided in front of such equipment?

• 4 feet
• 3 feet
• 5 feet
• 2 feet

NEC Reference: NEC 110.26(A)

Question 12: An electrical heater draws 8 amperes current from 120 volts power source. What is the resistance of heater?

• 15 ohms
• 0.067 ohms
• 0.53 ohms
• 1.875 ohms

Question 13: Cable tray systems shall not be used in …………..

• Power and control applications
• Signal cables
• Hoistways
• Service entrance systems

NEC Reference: NEC 392.12

Question 14: The service conductors that passes over a flat roof must have a vertical clearance of not less than …………. From the roof.

• 8 feet
• 6 feet
• 9 feet
• 10 feet

NEC Reference: NEC 230.24(A)

Question 15: A separate overload protection must be provided for the motor rated more than ……………….

• 1 horse power
• 2 horse power
• 1 ½ horse power
• ½ horse power

NEC Reference: NEC 430.32(A)