Question

Name HW Due 530/19 ART 430, 440 1. The motor disconnecting means is not required to be in sight from the motor and the driven machinery location, provided_ (a) the (b) the provisions for locking are permanently installed on, or at, the switch or circuit breaker used as the controller disconnecting means (c) locating the motor disconnecting means within sight of the motor is impractical or introduces additional or increased hazards to people or property (d) all of these controller disconnecting means is capable of being individually locked in the open position 2. The disconnecting means for the controller and motor must open all ungrounded supply must be designed so that no pole can be operated independently. (a) True conductors and (b) False The motor disconnecting means must whether it is in the open (off) or closed (on) position. (a) plainly indicate (b) provide current (c) be in the upper position (d) none of these e than one motor disconnecting means is provided in the same motor branch circuit, only one af 4. Where mor the disconnecting means is required to be readily accessible. (a) True (b) False 5. The motor disconnecting means can be a (a) circuit breaker (b) motor-circuit switch rated in horsepower (c) molded-case switch (d) any of these (d) locked-rotor current (c)amperes (a) horsepower (b) watts 7. A horsepower-rated inverse-time circuit breaker can serve as both a motor controller and disconnecting means if (a) it opens all ungrounded conductors (b) it is protected by an overcurrent device in each ungrounded conductor (c) it is manually operable, or both power and manually operable (d) all of these 8. Article 440 applies to electric motor-driven air-conditioning and refrigerating equipment that has a herm refrigerant motor-compressor. (a) True (b) False 9. The rules of_, as applicable, apply to air-conditioning and refrigerating equipment that do not incorpo hermetic refrigerant motor-compressor (a) Article 422 (c) Article 430 (d) all of these (b) Article 424 10. Equipment such as_ are considered appliances, and the provisions of Article 422 are applicable in ado to Article 440 (a) room air conditioners (c) drinking water coolers and beverage dispensers (b) household refrigerators and freezers (d) all of these

Answer 1

1. The correct answer is C. The motor disconnecting means is not required in sight in conditions when it poses additional safety hazards and locating the controller is not practical.

2. True, poles should not be operated individually as it creates safety issues and might cause severe hazards.

3. Plainly indicate is the correct choice. As it has to be very clear whether the motor disconnecting means is on or off.

4. True, accessibility of one of the switch is essential to shut tje motor controller off. Accessibility of even one switch can ward off any hazardous incident.