FREE AND STUDY GAMES ABOUT AC THEORY CH 28 EXAM

PDF Download

FREE AND STUDY GAMES ABOUT AC THEORY CH 28 EXAM

QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -26 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: 5. The addition of resistance to a reactive series circuit always

____(increases/decreases) the power factor of the circuit.

Answer:

increases

Question 2: d. PF = R/______ (Series Circuit)

Answer:

no answer given

Question 3: c. The true power used or consumed in this circuit is ____ watts.

Answer:

zero

Question 4: c. What percent of apparent power is used in the circuit?

Answer:

Question 5: b. Draw a sine wave showing current and voltage

Answer:

draw

Question 6: 8. How do you find apparent power in an AC circuit? State formula

Answer:

P = ET x IT

Question 7: d. What is the power factor of the circuit?

Answer:

Question 8: 7. As the phase angle is decreased, the power factor is _____.

Answer:

increased

Question 9: 1. Assume a pure inductive circuit and answer the following.

• Current will ___ the voltage by ___ degrees.

Answer:

Lag 90

Question 10: c. PF= _____theta

Answer:

Cos

Question 11: c. The true power used or consumed in the circuit is ____ watts.

Answer:

zero

Question 12: 12 Complete the following formulas

• VA = ?????/PF

Answer:

Watts

Question 13: 4. The addition of resistance to a reactive series circuit always

_____(increases/decreases) the phase angle

Answer:

decreases

Question 14: 2. Assume a pure capacitive circuit and answer the following.

• Current will ___ the voltage by ___ degrees.

Answer:

Lead 90 Question 15: 10. Complete the following formulas:

• PF = True Power/ ??????

Answer:

Apparent Power

Question 16: b. PF = ?????/Volt-amperes

Answer:

Watts

Question 17: d. What is the power factor of this circuit.

Answer:

0% page 138

Question 18: 11. Define power factor

Answer:

ration of true power to apparent power.True/Apparent

Question 19: d. What is the power factor of this circuit?

Answer:

0%

Question 20: 3. Assume a pure resistive circuit and answer the following.

• What phase relationship eists between voltage and current?

Answer:

in phase

Question 21: b. W = E x I x ________

Answer:

Cos of theta

Question 22: 9. True power is dissipated as ____.

Answer:

Heat

Question 23: c. W = ????? x PF

Answer:

VA

Question 24: e. PF = kW/????

Answer:

KVA Question 25: 6. Circuits that contain both resistance and reactance must have a power factor somewhere between ____ and ____ percent and a phase angle between ___ and ___ degrees.

Answer:

0% and

0% and 90%

Question 26: b. Draw a sine wave showing voltage and current.

Answer:

draw