EA 150 chapter 4 quiz questions

The type of three phase motor is determined by the

Router

If a squirrel cage induction motor draws 2 A of current at 240 V and is connected for use on 480 V the amperage will be

1 amp

Hey circuit breaker suitable for use as a motor disconnecting means must have a current rating of at least

115% of the motor full load current

If 210 ohms windings are connected in series 4 configuration on 480 V the total impedance is

20 ohms

Of the following motors the most common likely to have 15 or 18 motor leads is the

2400 V three phase motor

The synchronous speed of 60 Hz three phase induction motor with two poles is

3600 RPM

With 240 V applied to a total parallel impedance of five ohms the current is

48 A

The total resistance of a starter winding and a three phase motor if the windings are connected in parallel and the resistance of each winding is 96 ohms is

48 ohms

If the starter windings of a dual voltage motor both have an appearance of 10 ohms and they are connected in parallel the total impedance is

Five ohms

The main purpose of motor overload protection is to protect the motor

From damaging overload currents

Doubling the voltage on a dual voltage motor

Halves the full load current

Starter Winings can best be described as

Hey structure of copper or aluminum wire coils

The most common number of motor leads found on a three phase why wound motor is

Nine

The synchronous speed of a motor is the

Speed at which the magnetic fields rotate

The two most common three phase motor configurations are

Why and delta