kahoot elec Flashcards
What is the SI unit for torque?
Newton meter
In a RSIR motor the start winding is disconnected at?
at 75% of the rated speed
A CSIR motor has?
the best starting torque than other motors
a start capacitor has greater?
capacitance than the run capacitor
The horsepower rating of a motor is determined by?
speed and the torque
what is the HP formula?
(torque multiplied by Speed)/7121
In a PSC motor has?
A run capacitor connected continuously
A shaded pole motor?
Has shading coil
Capacitor are rated in?
Microfarads
The proper method to discharge a capacitor is to?
connect a 20,000 ohm resistor with a 5 watt rating
To change rotation direction in a RSIR?
Either switch the start or the run terminal
The run winding are mounted?
Deep into the stator slots?
One benefit of skewered rotor bars?
Quiet operation
The purpose of the end bells is to?
Seal the motor, hold the bearings and support the shaft
The centrifugal switch?
NC and mounted on the shaft
A dual voltage motor connected for high voltage has the run windings connected in?
Series
The CSCR motor, the potential relay disconnects?
The start capacitor
On a dual voltage RSIR motor connected for low voltage, the start windings would be connected in?
Parallel
A current relay contains
NO contacts
A potential relay includes?
NC contacts
To change the state of the contacts a current relay relies on?
Inrush current
The power factor is the ratio comparing?
The true power in Watts and Apparent power in VA
Pf=(P/S)
The capacitance of a capacitor is determined by?
The size of the conducting plates and the space between them
What determines the resistance for a capacitor?
Cross sectional
A CSIR motor has?
a start cap connected temporarily
A start cap?
connected in series with the start winding
Dual Voltage start winding terminals are labeled?
T5 T6 T7 T8
