Electrical Engineering Quiz

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

• Collection Efficiency

• Power Quality

• Reliability

• System 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?

• 12

• 9

• 6

• 4

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?

• 17 A

• 25 A

• 15 A

• 20 A

Which plant takes the least time in starting from cold conditions to full load operation?

• Steam turbine power plant

• Hydro power plant

• Nuclear power plant

• Gas turbine power plant

What is the equivalent IEEE device number for an under-voltage relay?

• 67

• 51

• 67

• 27

A coil of wire having a value of 10 + j16 ohms is connected in series with a capacitive reactance Xc, and this series combination is then connected in parallel with a resistor R. If the equivalent impedance of the circuit is 8 + j0 ohms, what is the value of Xc in ohms?

• 18

• 8

• 5

• 16

To adjust the power of the alternator, adjust the _______.

• Power factor

• Field current

• Frequency

• Governor

In a series RC circuit, the voltage across the capacitor and the resistor are 60 V and 80 V, respectively. What is the total voltage of the circuit?

• 115 V

• 105 V

• 90 V

• 100 V

A generator delivers a load through a pair of wires, each of which has a resistance of 0.06 ohm. If the load voltage and power are 120 V and 4.8 kW, respectively, what is the generated voltage?

• 125.5 V

• 123.5 V

• 126.8 V

• 124.8 V

In a 4-pole, 60 Hz, 200V induction motor having a full-load current of 350 A, torque developed is 700 N·m. What is the approximate speed of the motor?

• 1100 rpm

• 870 rpm

• 1250 rpm

• 955 rpm