POWER SYSTEM ANALYSIS AND DESIGN 7TH
EDITION ACTUAL EXAM PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Rated voltage. Answer: For any machine, the base voltage is always
taken from its ___.
◉ Base impedance. Answer: This is equal to the ratio of the actual
impedance and its per unit value.
◉ kVA or MVA. Answer: The usual unit(s) for base power.
◉ 0.9986cis(-1°) p.u.. Answer: For a system with a base voltage of
138000cis(45°), determine its per unit value if the system has an actual
voltage of 137800cis(44°).
◉ 0.04 p.u.. Answer: Up to 2 decimal places, determine the per unit
reactance of the transformer shown in the diagram.
◉ 6.054 ohms. Answer: Consider a system of source impedance 4.48
ohms connected to a 20 MVA, 11 kV/0.4 kV transformer at 6%
impedance. Solve for the base impedance of the source.
EDITION ACTUAL EXAM PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Rated voltage. Answer: For any machine, the base voltage is always
taken from its ___.
◉ Base impedance. Answer: This is equal to the ratio of the actual
impedance and its per unit value.
◉ kVA or MVA. Answer: The usual unit(s) for base power.
◉ 0.9986cis(-1°) p.u.. Answer: For a system with a base voltage of
138000cis(45°), determine its per unit value if the system has an actual
voltage of 137800cis(44°).
◉ 0.04 p.u.. Answer: Up to 2 decimal places, determine the per unit
reactance of the transformer shown in the diagram.
◉ 6.054 ohms. Answer: Consider a system of source impedance 4.48
ohms connected to a 20 MVA, 11 kV/0.4 kV transformer at 6%
impedance. Solve for the base impedance of the source.
