Washington 01 Journey Level Electrician Exam, Motors, HVAC, Generators and Transformers: all 59 questions

All questions from the Motors, HVAC, Generators and Transformers section for Washington 01 Journey Level Electrician Exam, each with the correct answer.

8001Branch-circuit conductors supplying a single continuous-duty motor must have an ampacity of at least what percentage of the motor full-load current?
8002A continuous-duty motor has a table full-load current of 28 A. What is the minimum ampacity of its branch-circuit conductors?
8003When sizing motor branch-circuit conductors and short-circuit protection for a general-purpose motor, which current must be used?
8004Which value is used to size separate motor overload protection?
8005A motor with a marked service factor of 1.15 needs a separate overload device. What is the maximum rating as a percentage of nameplate full-load current?
8006A motor is marked with a temperature rise of 40 degrees C. What overload rating is permitted as a percentage of nameplate current?
8007A motor has a service factor of 1.0 and no temperature rise marking. What is the maximum overload rating?
8008A motor with a service factor of 1.0 has a nameplate current of 20 A. What is the maximum separate overload setting under 430.32(A)(1)?
8009The overload selected at 125 percent is not enough to start a motor with a service factor of 1.15. What is the highest rating the next step permits?
8010How many overload units are required for a three-phase ac motor?
8011What is the maximum rating of an inverse time breaker used as motor branch-circuit short-circuit and ground-fault protection for a standard squirrel cage motor?
8012What is the maximum rating of a dual-element time-delay fuse used as motor branch-circuit short-circuit and ground-fault protection?
8013What is the maximum rating of a nontime delay fuse used for motor branch-circuit short-circuit and ground-fault protection?
8014What is the maximum setting of an instantaneous trip breaker for a squirrel cage motor other than Design B energy efficient?
8015The calculated motor short-circuit protection value does not match a standard size. What does 430.52 permit?
8016A three-phase motor has a table full-load current of 40 A. What is the maximum inverse time breaker rating for its branch circuit, without using exceptions?
8017A motor has a table full-load current of 22 A. Dual-element fuses are used for branch-circuit short-circuit protection. What is the maximum standard fuse size, applying the next higher size rule?
8020Where must a motor disconnecting means be located in relation to the motor and driven machinery?
8021What does the NEC mean when it says equipment is in sight from other equipment?
8022What is the minimum ampere rating of a motor disconnecting means for a motor rated 1000 volts or less?
8023A motor disconnect switch for a 10 hp motor must be rated in which unit?
8024How many conductors must a motor disconnecting means open?
8025What must a motor disconnecting means clearly indicate?
8027What is the minimum rating of a motor controller?
8028Where must the disconnecting means for a motor control circuit be arranged?
8032What does the code letter on a motor nameplate indicate?
8034Feeder conductors supplying several motors must have an ampacity of at least what?
8035A feeder supplies three motors with table FLCs of 40 A, 20 A and 10 A. What is the minimum feeder conductor ampacity?
8036How is the maximum feeder short-circuit and ground-fault protective device for a motor feeder determined?
8037The largest motor on a feeder has a 100 A branch-circuit breaker. The other motors have FLCs of 20 A and 10 A. What is the maximum standard feeder breaker size?
8038When may several motors be connected to a single branch circuit?
8039Which nameplate value is used to size branch-circuit conductors for a packaged air conditioning unit?
8040An air conditioning unit nameplate shows a maximum overcurrent protection (MOCP) of 40 A. What breaker is permitted?
8041Where must the disconnecting means for an outdoor air conditioning condenser be located?
8043A rooftop HVAC unit requires a service receptacle. What is the maximum distance from the equipment?
8044What other location rule applies to the HVAC service receptacle?
8045May the HVAC service receptacle be connected to the load side of the equipment disconnecting means?
8046Branch-circuit conductors for a single hermetic motor-compressor must have an ampacity of at least what?
8047What is the normal maximum branch-circuit short-circuit protection for a single hermetic motor-compressor?
8048A single-phase cord-and-plug connected room air conditioner needs what protection device in or on the cord?
8049A room air conditioner is the only load on a 20 ampere individual branch circuit. What is its maximum marked rating?
8050A room air conditioner shares a branch circuit with lighting outlets. What is its maximum rating?
8052Conductors from generator terminals to the first overcurrent device must have an ampacity of at least what?
8053A 20 kW, 240 volt single-phase generator supplies a distribution panel. What is the minimum ampacity of the conductors from the generator terminals to the first overcurrent device?
8057Within how many seconds must an emergency system provide power after loss of normal supply?
8058Within how many seconds must a legally required standby system provide power after loss of normal supply?
8061A transformer rated 1000 volts or less has primary protection only, and the primary current is 9 A or more. What is the maximum primary overcurrent device rating?
8062A small control transformer has a primary current of 5 A and primary protection only. What is the maximum primary overcurrent device rating?
8063A transformer with primary-only protection has a rated primary current below 2 A. What is the maximum primary overcurrent device rating?
8064A transformer rated 1000 volts or less has both primary and secondary protection. What is the maximum primary device rating?
8065With primary and secondary protection, what is the maximum secondary device rating for a transformer with a secondary current of 9 A or more?
8066A 45 kVA, 480 volt three-phase transformer has primary-only protection. What is the maximum standard primary breaker size?
8067What must be done regarding the ventilation of a transformer?
8068A 75 kVA dry-type transformer is installed indoors. What is the minimum separation from combustible material without a fire-resistant barrier?
8072Oil-insulated transformers installed indoors are generally required to be installed in what?
8074Secondary conductors leave a transformer and do not exceed 10 ft in length. What may they terminate in without protection at the secondary terminals?
8075Capacitors rated 1000 volts or less must discharge their residual voltage to what level within what time after disconnection?
8076What is the minimum ampacity of conductors supplying a capacitor?
8078Why are capacitors installed in motor circuits in industrial plants?

Washington 01 Journey Level Electrician Exam, Motors, HVAC, Generators and Transformers: all 59 questions

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