NCCER Exam Questions with 100% Correct Answers

The failure that results when two wires in the primary winding of a transformer come in contact with each other and bypass normal current flow is called a Correct Answer sort circuit Which test instrument would normally be used to measure the length of a cable run? Correct Answer Time domain reflectometer Wearing an ESD wrist strap helps to control damage to an ESD-sensitive device by Correct Answer grounding. Most people feel static electricity shock when the voltage level exceeds Correct Answer 2000 volts An electrical/electronic failure resulting from clogged air filters is most likely due to Correct Answer environmental condition The cleaning of battery terminals is considered a Correct Answer maintenance task the specifications for a 24VDC power supply list the maximum ripple for the power supply as 5%. What is the maximum ripple voltage you can have and still be in tolerance? Correct Answer 1.2 volts When checking for proper operation of a low voltage transformer, the first place you should measure for voltage is Correct Answer transformer secondary. The nameplate on a piece of equipment shows that it is designed to operate on 120VAC. What range of voltage can be applied to this equipment and still have it operate properly? Correct Answer 108-132-volt AC are power abnormalities often caused by lightning strikes. Correct Answer spike The failure that results when wire in the primary winding of a transformer comes in contact with the iron core of a transformer is called a Correct Answer Ground fault