Diagnostic Test For Electrician License Examination Preparation
Motors - Single Phase
Time Limit for This Page: 24 minutes
References Permitted: National Electrical CodeŽ, American Electrician's Handbook
Appropriate for Journeyman Electrician, Master Electrician and Electrical Inspector Exams.
Question #1
What is the full load current of a 6 1/2 HP 240 volt single phase motor?
Question #2
What is the smallest allowable THWN copper conductor to supply a 3 HP single phase motor which operates at 240 volts and is adjacent to the power supply?
Question #3
What is the smallest allowable THWN copper feeder for four 5 HP 240 volt single phase motors if the voltage drop is ignored?
Question #4
What is the appropriate inverse time overcurrent protection for a 10 HP 240 volt single phase motor feeder?
Upon completion, use any remaining time to make sure you have the right answers. When time has expired, go to the answer page to check your answers with the given answers.
Click HERE for ANSWERS TO DIAGNOSTIC TESTS.
If you did not score three correct in the time allowed, then you might want to consider exam preparation with the help of the David U. Larson workbook:
Click HERE for INFO ABOUT Calculations Workbooks for Electrician License Examinations.