Electronics Information - Asvab (Full) Test

Front 1

Electronics Information - ASVAB (full) test
1: Which of the following symbols represents a diode?


A. 1
B. 2
C. 3
D. 4

Back 1

B. 2
B. Symbol 2 represents a diode.

Front 2

Electronics Information - ASVAB (full) test
2: Electronic current is measured in

A. farads.
B. volts.
C. amperes.
D. ohms.

Back 2

C. amperes.
C. Electronic current is measured in amperes. Capacitance is measured in farads. Voltage difference is measured in volts. Resistors are measured in ohms.

Front 3

Electronics Information - ASVAB (full) test
3: The total resistance for this circuit if all resistors are 200 ohms is


A. 100 ohms.
B. 200 ohms.
C. 150 ohms.
D. 400 ohms.

Back 3

A. 100 ohms.
A. Total resistance for parallel resistors is ??

Front 4

Electronics Information - ASVAB (full) test
4: For the lamp to be turned on in the following circuit


A. switch 1only should be closed.
B. switch 2 only should be closed.
C. switches 1 and 2 only should be closed.
D. all the switches must be closed.

Back 4

C. switches 1 and 2 only should be closed.
C. Switch 1 and switch 2 only should be closed. Switch 3 must be opened; otherwise, it will cause a short circuit.

Front 5

Electronics Information - ASVAB (full) test
5: A voltmeter is a device used for measuring

A. electrical current.
B. electrical charge.
C. energy.
D. difference in voltage.

Back 5

D. difference in voltage.
D. A voltmeter is a device used to measure the difference in voltage. An ammeter is used to measure electrical current. Electrical charge or energy cannot be measured by a voltmeter.

Front 6

Electronics Information - ASVAB (full) test
6: Leather gloves must be used when

A. working with low-power transistors.
B. working with live high-voltage devices.
C. testing low-power DC circuits.
D. designing a low-power circuit.

Back 6

B. working with live high-voltage devices.
B. Leather gloves withstand high voltage.

Front 7

Electronics Information - ASVAB (full) test
7: The frequency of this signal is


A. 100 Hz.
B. 10 Hz.
C. 5 Hz.
D. 1 Hz.

Back 7

C. 5 Hz.
C. Frequency of a wave is given as ?.

Front 8

Electronics Information - ASVAB (full) test
8: An AM radio signal is

A. amplitude modulated.
B. frequency modulated.
C. phase modulated.
D. DC modulated.

Back 8

A. amplitude modulated.
A. An AM modulated signal is an amplitude modulated signal. FM signals are frequency modulated signals. PSK signals are phase modulated signals. DC cannot be used for modulation.

Front 9

Electronics Information - ASVAB (full) test
9: The reading of the ammeter in this circuit is


A. 10:00 AM
B. 5:00 AM
C. 1:00 AM
D. 2:00 AM

Back 9

C. 1:00 AM
C. The ammeter in the circuit reads the value of the current flowing in the resistor. The current flowing is calculated as V/R=10/10=1A.

Front 10

Electronics Information - ASVAB (full) test
10: In order to protect an electric circuit, the following component can be used:

A. a fuse
B. a capacitor
C. an inductor
D. an ammeter

Back 10

A. a fuse
A. In order to protect an electric circuit, a fuse can be used. Once the current rating is higher than the fuse rating, the fuse will break, preventing the flow of current.

Front 11

Electronics Information - ASVAB (full) test
11: Which of these symbols represents a bipolar junction transistor (BJT)?


A. 1
B. 2
C. 3
D. 4

Back 11

C. 3
C. Symbol 3 represents a bipolar junction transistor (BJT).

Front 12

Electronics Information - ASVAB (full) test
12: A signal is transmitted wirelessly by carrying it on

A. a square wave.
B. a DC signal.
C. a triangular wave.
D. a high-frequency sinusoidal wave.

Back 12

D. a high-frequency sinusoidal wave.
D. A signal is transmitted by being carried on a high frequency sinusoidal signal called a carrier signal.

Front 13

Electronics Information - ASVAB (full) test
13: The signal s(t) = 10 sin (120pt) has the following amplitude and frequency, respectively:

A. 5 V and 120 Hz
B. 10 V and 60 Hz
C. 10 V and 120 Hz
D. 5 V and 60 Hz

Back 13

B. 10 V and 60 Hz
B. The signal s(t) can be written in the form s(t) = amplitude × sin(2pft), so that the amplitude is 10 V and the frequency is 60 Hz.

Front 14

Electronics Information - ASVAB (full) test
14: The reading of the voltmeter in this circuit is


A. 5 V
B. 10 V
C. 0 V
D. 2.5 V

Back 14

C. 0 V
C. Since all of the resistors are equal in value, then the currents in both branches of the circuit are equal. This makes the voltage difference between the leads of the voltmeter equal to zero.

Front 15

Electronics Information - ASVAB (full) test
15: An ohmmeter is a device used to measure

A. resistance.
B. voltage.
C. power.
D. current.

Back 15

A. resistance.
A. An ohmmeter is a device used to measure resistance. A voltmeter is used to measure a voltage difference. A wattmeter is used to measure power, and an ammeter is used to measure current.

Front 16

Electronics Information - ASVAB (full) test
16: A certain signal is carried on a radio signal by using the following electronic component:

A. resistor
B. mixer
C. capacitor
D. on-off switch

Back 16

B. mixer
B. Signals are carried on other high frequency signals by frequency mixers.

Front 17

Electronics Information - ASVAB (full) test
17: In a diode (PN Junction), the current flows

A. from anode to cathode.
B. from cathode to anode.
C. in both directions.
D. when voltage is below threshold.

Back 17

A. from anode to cathode.
A. A diode permits the flow of the current in one direction only: from the anode to the cathode, when the voltage applied is greater than the threshold level.

Front 18

Electronics Information - ASVAB (full) test
18: A component of a parts list has the following specifications: "10 mH." The component specified is a

A. capacitor.
B. transistor.
C. coil.
D. resistor.

Back 18

C. coil.
C. A coil inductance is measured in henrys. Capacitance is measured in farads. Transistors have numbers to identify them. Resistance is measured in ohms.

Front 19

Electronics Information - ASVAB (full) test
19: Electronic devices are grounded to

A. reduce the cost.
B. protect the user.
C. reduce the power dissipation.
D. enhance performance.

Back 19

B. protect the user.
B. Electronic devices are grounded to protect the user from an electric shock.

Front 20

Electronics Information - ASVAB (full) test
20: The power dissipated across the resistors in the following circuit is


A. 0.3 watt.
B. 0.5 watt.
C. 1.0 watt.
D. 1.5 watt.

Back 20

A. 0.3 watt.
A. Power dissipated in the circuit can be calculated as ?.