# Practice Test: Question Set - 01

**1. A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is**

- (A) 6 V

- (B) 30 V

- (C) 35 V

- (D) 0 V

**2. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of**

- (A) 25 kHz

- (B) 12 kHz

- (C) 18 kHz

- (D) 1.3 MHz

**3. Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?**

- (A) Wave A leads
wave B by 15°

- (B) Wave A lags
wave B by 15°

- (C) Wave A leads
wave B by 105°

- (D) Wave A lags
wave B by 105°

**4. A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.**

- (A) True

- (B) False

**5. If the rms current through a 6.8 kΩ resistor is 8 mA, the rms voltage drop across the resistor is**

- (A) 5.44 V

- (B) 54.4 V

- (C) 7.07 V

- (D) 8 V

**6. A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is**

- (A) 45.12 mA

- (B) 16 mA

- (C) 39.6 mA

- (D) 22.6 mA

**7. The unit of frequency is the hertz.**

- (A) True

- (B) False

**8. If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is**

- (A) 4 V

- (B) 18.8 V

- (C) 26.6 V

- (D) 2.66 V

**9. The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is**

- (A) 40 Hz

- (B) 100 Hz

- (C) 400 Hz

- (D) Indeterminable

**10. If a sine wave goes through 10 cycles in 20 μs, the period is**

- (A) 20 μs

- (B) 4 μs

- (C) 2 μs

- (D) 100 μs

**11. Amplitude is the maximum value of a voltage or current.**

- (A) True

- (B) False

**12. How many degrees are there in π/3 rad?**

- (A) 6°

- (B) 60°

- (C) 180°

- (D) 27°

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