ASVAB ASVAB Electronics Fundamentals and Circuits 4

Question 1

A transformer has a primary winding of 200 turns and a secondary winding of 50 turns. If the primary voltage is 120V, what is the secondary voltage?

Accepted Answer

30V

Answer

480V

Answer

60V

Answer

15V

Question 2

Which type of capacitor is polarized and must be installed with correct polarity?

Accepted Answer

Electrolytic capacitor

Answer

Ceramic disc capacitor

Answer

Mica capacitor

Answer

Film capacitor

Question 3

In a purely inductive AC circuit, the current lags the voltage by how many degrees?

Accepted Answer

90°

Answer

0°

Answer

45°

Answer

180°

Question 4

What does a diode's 'forward voltage drop' refer to?

Accepted Answer

The minimum voltage required for the diode to conduct in the forward direction

Answer

The voltage needed to reverse-bias the diode

Answer

The maximum reverse voltage before breakdown

Answer

The voltage drop across the internal resistance

Question 5

Two capacitors of 4μF and 12μF are connected in series. What is the total capacitance?

Accepted Answer

3μF

Answer

16μF

Answer

8μF

Answer

48μF

Question 6

What is the primary function of a zener diode in a circuit?

Accepted Answer

Regulate voltage by maintaining a constant reverse breakdown voltage

Answer

Amplify AC signals

Answer

Convert AC to DC

Answer

Store electrical charge

Question 7

If a resistor is color-coded yellow, violet, orange, gold, what is its resistance value?

Accepted Answer

47,000Ω ±5%

Answer

4,700Ω ±5%

Answer

470Ω ±5%

Answer

4,700Ω ±10%