Theory related questions will be on your electrical examination. Often the answers to these types of questions cannot be found in a code book.
Can you answer the following question?
In an alternating current circuit with an effective voltage of 240 volts, what is the maximum value of the voltage in a cycle?
A. 220 volts
B. 312 volts
C. 339 volts
D. None of the above
Solution:
C. 339 volts
Use the following formula:
Maximum Voltage = Effective Voltage x ?2
Em = E x ?2
=240 volts x 1.414
=339 volts
In order to answer this question correctly first you’ll need to know:
#1 What is maximum voltage?
#2 What is effective voltage?
#3 Why does multiplying the effective voltage by the constant 1.414 or the ?2 equal maximum voltage?
We’ll help you prepare to answer theory related electrical exam questions with the confidence required to pass your exam. Call 888-919-3926 and start preparing to pass your exam today.