Jatc Exam Questions & Answers: Verified; Updated A+ Score Guide Solution

Jatc Exam Questions & Answers: Verified; Updated A+ Score Guide Solution A diode is forward biased when the cathode is connected to the ? side of the external voltage source and the anode is connected to the ? side. - Answer- NEGATIVE / POSITIVE The vertical line on the diode symbol, or the striped end of a diode, denotes the ? . - Answer- CATHODE The maximum reverse bias voltage a diode can withstand is known as ? voltage. - Answer- PEAK INVERSE Since diodes conduct current flow in only one direction, they are commonly used to convert an AC voltage to a(n) ? DC voltage. - Answer- PULSATING is the process of converting an AC voltage to a DC voltage. - Answer- RECTIFICATION Capacitive, inductive and ultrasonic are three types of ? sensors that are based on the sensor's operating principles. - Answer- proximity Sensors that use an NPN transistor to switch DC loads are current- ? devices. - Answer- sinking A ? can be used to protect SSRs from brief voltage spikes. - Answer- metal-oxide varistor The fault current withstand rating of an MCC is determined by the highest rated device within the MCC. - Answer- false What is the class and type of an MCC consisting of interconnecting units with Size 3 or smaller starters and terminations on terminal blocks mounted on the bottom of each vertical section? - Answer- Class 2 type C The ? should be used to install, operate, or maintain an MCC. - Answer- manufacturer's manual Full voltage is applied to the motor at all times through acceleration and up to normal speed in what type of starting method? - Answer- part winding starting Swapping any two power phase leads will reverse the direction of a three-phase motor. - Answer- true ? recycle timers allow independent control of the ON period and OFF period. - Answer- asymmetrical Programmed timers' output contacts change state when the ? value equals the preset value. - Answer- accumulated Typical time bases available for programmable timers are 0.01, 0.1, and 1.0 minutes. - Answer- false The actual amount of time a programmable timer measures is the ? value times the time base. - Answer- preset ? latching relays have a latch coil and an unlatch coil. - Answer- mechanical To operate a wound rotor motor at full speed, the rotor windings must be ? . - Answer- shorted together A variable frequency drive provides a 48 hertz AC voltage to a 3-phase AC motor that has four poles per phase. What would be the synchronous speed of the motor with this voltage applied - Answer- 1440 RPM