Journeyman Electrician Practice Test 19

Question 1: If the total ampere of house is 30 which has three branch circuits, what is the minimum size of a branch circuit wire that can be used?

• No 6
• No 8
• No 10

Question 2: The distance between service pole and the house building is 120 ft. what is the minimum overhead span wire size?

• No 6
• No 8
• No 10

NEC Reference: NEC 224.6(a)

Question 3: The emergency power supply in hospital should provide full power within ............. sec of normal power failure.

• 10
• 30
• 50
• 60

Question 4: If the battery bank is used as emergency supply, the battery must be of size that will supply the load for a minimum of  .......... hours

• 1 1/2
• 1
• 2
• 1/2

Question 5: The equivalent of  86 ⁰F in degree centigrade is ......................... ⁰ C.

• 30
• 212
• 97
• 47

Question 6: If five mobile homes are connected to one feeder with an assumed load of 16000 watts each, at 115/230 volts, what is the minimum ampacity of the wires in a feeder circuit?

• 115 amperes
• 348 amperes
• 174 amperes
• 195 amperes

Question 7: what is the power required for lighting the 800 sq ft apartment?

• 800 watts
• 2400 watts
• 1600 watts

Question 8: what is the minimum clearance between two single peace of electrical equipments which are in same sight?

• 10
• 25
• 47.5
• 50

Question 9: Which of the following electrical switching device is utilized to isolate a circuit or equipment from the power supply?

• circuit breaker
• protection device
• disconnection switch
• fuse

Question 10: ................................... is the integral part of the motor which protects the motor from over heating.

• Internal fuse
• Ground fault protector
• thermal protector
• over load protector