CWEA E/I Level 3 Study Questions with 100% Correct Answers

If the potential difference across the coil is low, the coil will: A-draw too much current B-become too hot C-Produce too much magnetic force D-not heat up D-not heat up The NEC identifies environments that contain flammable vapors and gases as which class of hazardous location? A-Class I B-Class II C-Class III D-Class IV A-Class I Which of the following reduces high voltages and currents to save values for measurements? A-auto transformer B-megohmmeter C-instrument transformer D-variable transformer C-instrument transformer In a three wire control circuit, when a power failure occurs: A-The interlock contact will close the circuit B-The operator can restart the meter automatically C-The motor can restart unexpectedly D-The operator must restart the meter manually D-The operator must restart the meter manually Push buttons are classified as standard duty or heavy duty according to the: A-Kind of enclosure B-Service conditions C-frequency operation D-Current carrying ability D-Current carrying ability He push to test pilot light is used in applications where the pilot light is: A-rarely needed B-A neon bulb C-used in DC applications D-in constant use A-rarely needed The advantage of LCDs over LEDs is: A-accuracy B-better visibility C-lower power consumption D-sensitivity C-lower power consumption Shielding protects an analog meter from: a. damage due to careless handling. b. harmful UV rays. c. over-current and surges. d. stray magnetic fields. d. stray magnetic fields. An ammeter should be connected: a. across the line. b. around an inductor. c. in parallel with the load. d. in series with the load. d. in series with the load. Bar graphs and wave forms can be displayed on a LCD screen when the multimeter has: a. analog/digital circuits. b. microprocessor circuitry. c. opposing coils and a commutator. d. parallel ports. b. microprocessor circuitry. The difference between the squirrel-cage rotor and the wound rotor is in: a. their pole-phase groups. b. how the conductors are connected. c. how the current is induced in the conductors. d. all of the above. b. how the conductors are connected. The frame, the core, the winding, and the end plates are all parts of the: a. rotor. b. stator. c. alternator. d. induction motor b. stator.