motors 2-2 single phase motors

Which of the following is a method for terminating inside a 1-ph motor terminal box? I. Direct wire method II. Terminal post method III. Terminal post with links method

1,2,3

Determine the resistance and tolerance of a power resistor with color bands of brown, red, orange, and gold.

12,000 Ω / 5%

Wiring methods inside a terminal box include terminal post, direct wire, and direct wire with links.

False

A multispeed capacitor-run motor changes speed by adding impedance to the run winding and increasing the slip, not by changing the number of poles.

True

Both single-phase and 3-phase motors have a stator and rotor

True

The purpose in making motors for two voltages is to enable the same motor to be used with two different power-line voltages.

True

To cause the rotor of most single-phase motors to turn in reverse, it is only necessary to switch the two start leads in the circuit.

True

A ? is a device that stores an electrical charge.

capacitor

Typical applications of ? motors include fairly hard-to-start loads, like refrigerators, air conditioners, air compressors, and some power tools.

capacitor

A capacitor start-and-run motor has the same starting torque as a ? motor.

capacitor start

A permanent split-capacitor motor is also known as a ? motor.

capacitor-run

A ? switch removes the capacitor and start winding from the circuit after the motor accelerates in a capacitor-start motor.

centrifugal

If a capacitor-start motor is to be reversed often, then a ? switch or foot switch can be used to reverse the current through the start with respect to the run windings.

drum

When rotation is not possible because the stator's field and the rotor's field are equal or parallel to one another, the rotor is ? .

locked in place

For the terminal post with links method, the links are used as jumpers to change ? . The links are added by removing the terminal bolt, placing the link over the terminal post, and reconnecting the terminal bolt.

motor direction

The ? connection of a dual-voltage motor is used for low voltage while the ? connection is used for high voltage.

parallel / series

When the dual voltage single-phase motor is reconnected for the higher voltage (115 volts to 230 volts), the current is ? .

reduced by half

A ? is a short-circuited winding, which consists of a single turn of copper wire and acts on only a portion of the stator windings.

shaded-pole

A capacitor-start motor operates much the same as a ? , in that it uses a centrifugal switch that opens at approximately 60% to 80% of full-load speed.

split-phase

A(n) ? motor is a single-phase AC motor that includes a run winding and a resistive start winding used in applications where starting is easy, such as fans, business machines, machine tools, and centrifugal pumps.

split-phase

A ? is the fixed, unmoving part of a motor, consisting of a core and windings, that converts electrical energy to the energy of a magnetic field.

stator