Professional Electrical Engineering Quiz 3 PART 1 1-55

The color reserved for use in equipment grounding conductor is

• Yellow

• Green

• White

• Gray

What is the emf induced across an inductor with 150 mH inductance and a constant current of 4 amperes?

• 0.6 V

• 0 V

• 1.2 V

• 12 V

Which of the following is not a full-duplex?

• Radar

• Telephone

• Telemetry

• Local Area Network

In a circuit breaker, the time duration from the instant of the fault to the extinction of arc is known as

• operating time

• total clearing time

• lag time

• lead time

A resistance of 6 Ω is connected in parallel with another resistor R across a 120 V supply. The total current taken from the supply was found to be 40 A. What is the value of resistance R?

• 1 Ω

• 2 Ω

• 4 Ω

• 6 Ω

A 50 cm long conductor is moved in a field of density 1 Wb/m² at a velocity of 30 m/s. What is the emf induced if the motion is perpendicular to the field?

• 150 V

• 1.5 V

• 15 V

• 0.15 V

Two capacitors C₁ = 50 μF and C₂ = 30 μF are connected in series. Find the equivalent capacitance in μF.

• 1.875

• 187.5

• 18.75

• 1.875

34.5 kV to 69 kV is classified as

• low voltage

• medium voltage

• high voltage

• extra high voltage

Wavelength is the distance traveled by an electronic wave during the time of one cycle. Given a wavelength of 12 meters, what is the frequency?

• 250 kHz

• 25 kHz

• 250 MHz

• 25 MHz

A 4-pole DC generator has a total of 600 conductors in its lap wound armature. The flux per pole is 10⁶ lines. Determine the generated emf if it is driven at 2,400 rpm.

• 230 V

• 254 V

• 234 V

• 240 V