26311-20 motor controls

Which of the following are primarily designed for use with inductive motor loads and to withstand the interrupt current of a locked rotor?

• NEMA-rated contractors/motors starters

• Definite-purpose contractors/motors starters

• Lighting contactors

• IEC-rated contactors/motors starters

A relay designated as a 3PDT-SB relay

• Has three N.O. (Normally open) contacts

• Has three N.O. (Normally open) and three N.C. (Normally closed) contacts

• Is a single-throw type

• Is a double-break type

The component marked 1 in the figure provided is a(n)

• Melting-alloy heater assembly

• Overload contact

• Load terminal

• Reset terminal

The components marked 2 in the figure provided are

• Overload contacts

• Reset terminals

• Melting-alloy heater assemblies

• Load terminals

A NEMA-rated motor starter consists of an enclosure containing

• One or more magnetic contactors with associated overloads relays

• Magnetic contactor hard and stop and start pushbuttons

• Disconnect switch and magnetic contactor

• A circuit breaker and magnetic contactor

if the heater is in a fixed IEC bimetallic overload relay fails

• The heater must be replaced with a heater of the same size

• The entire overload relay must be replaced

• It and all the other heaters in the overload relay must be replaced

• The heater can be replaced with a heater of the same size or one that is slightly smaller

Inching is also referred to as

• Throttling

• Jogging

• Stepping

• Plugging

The nameplate on a motor indicates that the motor has an FLC of 10A how do I end a service factor (SF) of 1.15. How much additional current can this motor safely handle for intermittent power demands?

• 1.5A

• 1.75A

• 2.25A

• 3.5A

Most transient suppression modules consist of an RC circuit that is designed to suppress coil voltage transients to approximately what percentage of the peak coil supply voltage?

• 75%

• 100%

• 150%

• 200%

If a duty cycle includes only non-inductive or slightly inductive loads, select an

• AC-1 rated motor control device

• AC-2 rated motor control device

• AC-3 rated motor control device

• AC-4 rated motor control device