Aux 2 Unit 4 Quiz 3

Correct Answer:
A) The ends of each winding are connected to form a closed loop with no common point

Explanation:
In a Delta connection, the windings are connected end-to-start, forming a closed loop or triangle. Each junction between windings connects to one of the three supply phases.

Correct Answer:
B) Each winding is connected to a common neutral point, and the free ends are connected to the power supply

Explanation:
In a Star configuration, each of the three motor windings is connected to a common central point (neutral), while the other ends are connected to the supply phases, forming a star shape.

Correct Answer:
C) The motor would produce reduced torque and may fail to start heavy loads

Explanation:
When a motor designed for Delta is connected in Star, it operates at a reduced voltage (phase voltage is √3 times less than line voltage), resulting in lower torque and insufficient power for heavy loads.

Correct Answer:
C) It may fail to start or run with reduced performance

Explanation:
The reduced voltage in the Star connection leads to lower starting and running torque, which may prevent the motor from starting or cause it to run inefficiently under load.

Correct Answer:
B) Phase voltage equals the line voltage

Explanation:
In a Delta connection, each winding receives the full line voltage, which results in higher torque and power output.

Correct Answer:
C) Phase voltage is √3 times less than the line voltage

Explanation:
In a Star connection, the phase voltage is lower than the line voltage by a factor of √3, which helps reduce starting current and torque.

Correct Answer:
B) Because the phase voltage applied to the windings is reduced

Explanation:
In a Star configuration, the voltage across each winding is reduced compared to a Delta connection, leading to lower torque and power output.