ASVAB Electronics Information Practice Test 850347 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.28
Score	0%	66%

Review

An engineer who wants to document an electric circuit would create which of the following?

67% Answer Correctly

	a layout
	a matrix
	a schematic
	a blueprint

Solution

A schematic is the proper name for a drawing of an electric or electronic circuit.

Which of the following allows DC to pass easily but resists the flow of AC?

56% Answer Correctly

	inductor
	semiconductor
	capacitor
	transformer

Solution

An inductor is coiled wire that stores electric energy in the form of magnetic energy and resists changes in the electric current flowing through it. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC.

Which of the following is not a characteristic of a step-up transformer?

54% Answer Correctly

	increases voltage
	the primary voltage is higher than the secondary voltage
	the secondary voltage is higher than the primary voltage
	has more turns in the secondary winding than in the primary winding

Solution

As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.

This circuit component symbol represents a(n):

72% Answer Correctly

	resistor
	capacitor
	inductor
	potentiometer

Solution

Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.

5 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 585 volts and current is 6.5 amps.

80% Answer Correctly

	92 Ω
	135 Ω
	30 Ω
	90 Ω

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

Solved for resistance, R = \( \frac{V}{I} \) = \( \frac{585}{6.5} \) = 90 Ω