Electrical Engineering Challenge

Which of the following is NOT INCLUDED in the Technical Performance Standards for Distribution and Supply set by the Philippine Distribution Code?

• B. Load Forecasting

• D. Demand Response

• A. Voltage Regulation

• C. Collection Efficiency

Three 3-ohm resistors are connected in parallel. This combination is then placed in series with another 3-ohm resistor. What is the equivalent resistance in ohms? A. 12 B. 9 C. 4 D. 6

• 3

• 6

• 15

• 1

What size of branch circuit is required for a window air conditioner with a nameplate rating of 8 A if the circuit also supplies other outlets? A. 17 A B. 25 A C. 20 A D. 15 A

• C. 20 A

• 12 A

• 30 A

• 10 A

Which plant takes the least time in starting from cold conditions to full load operation? A. Steam turbine power plant B. Hydro power plant C. Gas turbine power plant D. Nuclear power plant

• G. Geothermal power plant

• C. Gas turbine power plant

• E. Biomass power plant

• F. Wind power plant

What is the equivalent IEEE device number for an under-voltage relay? A. 67 B. 27 C. 51 D. 67

• 59

• 34

• 51

• 27

A coil of wire having a value of 10 + j16 ohms is connected in series with a capacitive reactance Xc, and this series...

• 10 + j16 ohms

• 10 + j(16 - Xc) ohms

• 10 - j(16 + Xc) ohms

• 20 + j16 ohms

What is the formula for calculating the total resistance in a series circuit? A. R_total = R1 + R2 + R3 B. R_total = R1 * R2 * R3 C. R_total = R1 / R2 D. R_total = R1 + R2 - R3

• R_total = R1 * (R2 + R3)

• R_total = R1 + R2

• A. R_total = R1 + R2 + R3

• R_total = R1 - R2 - R3

In a parallel circuit, what happens to the total current as more branches are added? A. It decreases B. It remains the same C. It increases D. It becomes zero

• B. It remains the same

• A. It decreases

• D. It becomes zero

• C. It increases

What is the primary function of a transformer? A. To increase voltage B. To decrease voltage C. To isolate circuits D. All of the above

• D. All of the above

• To regulate current flow

• To store electrical energy

• To convert AC to DC

Which of the following is a common unit of electrical power? A. Volt B. Ampere C. Watt D. Ohm

• C. Watt

• Joule

• Coulomb

• Henry