Motors Lvl 2

A _____ motor is a DC motor that has the field wiring connected in both series and parallel with the armature. A. Compound B. Shunt C. Series D. Wound Rotor

A. Compound

A(n) _____ circuit breaker operates immediately and have no delay between the sensing element and the tripping action of the device. A. Instantaneous trip B. Inverse- time C. Adjustable trio D. Non-adjustable trip

A. Instantaneous trip

A(n) _____ in a motor is caused by a load that exceeds the full-load rating of the motor. A. Overload B. Phase imbalance C. Ground fault D. Short circuit

A. Overload

A ______ is a short-circuited winding, which consists of a single turn of copper wire and acts on only a portion of the statue windings A. Shaded-Pole B. Stator Winding C. Rotor Winding D. Capacitor

A. Shaded-Pole

The _____ of a motor support(s) the motor shaft. A. Stator B. Bearing C. Endbell D. Shaft

B. Bearing

A _______ motor is a DC motor that has the field wiring connected in parallel with the armature. A. Series B. Shunt C. Compound D. Capacitor

B. Shunt

Brushes and _______ are used to connect the rotor of a wound-rotor motor to an external set of secondary resistors. A. Pigtails B. Slip Rings C. Drum Switches D. Rectifiers

B. Slip Rings

The ____ rating of an OCPD is the maximum amount of current that can be safely applied while still maintaining the physical integrity. A. Voltage B. Thermal C. Interrupting D. Current

C. Interrupting

A(n) _____ condition causes the current to rise hundreds of times higher than normal at a very fast rate. A. Single phasing B. Voltage sag C. Short-circuit D. Overload

C. Short-circuit

In a compound DC generator the ____ field is usually made to be the strongest. A. Series B. Stabilizing C. Shunt D. Compound

C. Shunt

A wound-rotor motor delivers higher _______ than a squirrel-cage motor without creating an overload of the electrical system A. Inductance B. Current Draw C. Starting torque D. Resistance

C. Starting Torque

The ______ connection of a dual-voltage motor is used for low voltage while the ______ connection is used for high voltage. A. Series/parallel B. Secondary/primary C. Primary/secindary D. Parallel/series

D. Parallel/series

When the power is removed, DC ______ motors provide some self-braking and produce relatively high torque at low speeds. A. Compensating-Magnet B. Cumulative-Compounded C. Differential-Compounded D. Permanent-Magnet

D. Permanent-Magnet

When the dual voltage single-phase motor is reconnected for the higher voltage (115 v to 230 v), the current is ______ A. Doubled B. Increased by 25% C. Reduced by 25% D. Reduced by half

D. Reduced by half

The speed of a wound-rotor motor may be reduced by increasing the _______ of the rotor circuit while the motor is running, in order to reduce the current in the rotor windings A. Frequency B. Inductance C. Magnetism D. Resistance

D. Resistance

A(n) _____ circuit breaker uses a bimetallic strip connected in series with the load to open a circuit. A. Instantaneous trip B. Magnetic C. Switch D. Thermal-magentic

D. Thermal magnetic

To avoid nuisance tripping due to equipment startup characteristics, time-delay fuses do not allow over currents to exist. True or False

False