per unit quantities and p.u. impedance diagram

Question 1: What is the per unit quantity if the actual value is 10 and the base value is 5?

• 2

• 3

• 7

• 5

Question 2: If the actual value of a parameter is 20 and the base value is 4, what is the per unit quantity?

• 10

• 3

• 8

• 5

Question 3: Calculate the per unit quantity if the actual value is 30 and the base value is 6.

• 10

• 20

• 15

• 5

Question 4: Draw a p.u. impedance diagram for a circuit with a per unit impedance of 0.2.

• 0.8

• 0.2

• 1.2

• 0.5

Question 5: Represent the p.u. impedance diagram for a system with a per unit impedance of 0.5.

• 0.3

• 2.0

• 0.5

• 1.5

Question 6: Sketch the p.u. impedance diagram for a network with a per unit impedance of 0.8.

• A single point at 0.8 on the imaginary axis

• A line passing through 0.8 on the real axis

• A single point at 0.8 on the real axis

• A circle with radius 0.8 centered at the origin

Question 7: Convert the actual impedance value of 25 ohms to per unit using a base value of 5 ohms.

• 10.0 pu

• 5.0 pu

• 0.25 pu

• 2.5 pu

Question 8: If the actual impedance is 40 ohms and the base value is 8 ohms, what is the per unit impedance?

• 20

• 10

• 5

• 30

Question 9: Convert the actual reactance value of 30 ohms to per unit using a base value of 6 ohms.

• 15 per unit

• 5 per unit

• 20 per unit

• 10 per unit

Question 10: Interpret the p.u. impedance diagram of a system with a per unit impedance of 0.3.

• The system has a relatively low impedance, indicating poor capability to conduct electricity.

• The system has a relatively low impedance, indicating good capability to conduct electricity.

• The system has a relatively high impedance, indicating poor capability to conduct electricity.

• The per unit impedance has no impact on the system's capability to conduct electricity.