ASVAB ASVAB Certifications ASVAB-SECTION-5 Questions & Answers

• Question 81:

  Changing alternating current to direct current is called __________.

  A. capacitance

  B. impedance

  C. rectification

  D. induction

  Correct Answer: C

  Changing AC to DC is a process called rectification.

• Question 82:

  Radio waves travel __________.

  A. at the speed of light

  B. at the speed of sound

  C. faster than the speed of light

  D. faster than the speed of sound but slower than the speed of light

  Correct Answer: A

  Radio waves travel at the speed of light. The speed of sound is much slower.

• Question 83:

  Millihenries are related to __________.

  A. capacitors

  B. inductors

  C. relays

  D. transformers

  Correct Answer: B

  Inductors are rated in millihenries.

• Question 84:

  Radar can operate at frequencies as high as __________.

  A. 100,000 Hz

  B. 100,000 kHz

  C. 100,000 MHz

  D. 500,000 MHz

  Correct Answer: C

  Radar can operate as high as 100,000 MHz (megahertz).

• Question 85:

  When current flows through a wire, the following influences are present __________.

  A. amperes and ohms only

  B. voltage, watts, and ohms only

  C. voltage and amperes only

  D. voltage, ohms, and amperes

  Correct Answer: D

  Voltage, ohms, and amperes are always present when current flows through a wire.

• Question 86:

  Newer cell phones contain a removable memory card, which is often called a __________.

  A. SIM card

  B. DIM chip

  C. PIN card

  D. Pin chip

  Correct Answer: A

  SIM stands for Subscriber Identity Module. The card contains information such as your phone number, your billing information, and your address book. It makes it easier to switch from one cell phone to another.

• Question 87:

  Another name for cycles per second is __________.

  A. watts

  B. voltage

  C. hertz

  D. amperes

  Correct Answer: C

  The number of times alternating current changes direction in one second is known as its frequency, which is measured in hertz.

• Question 88:

  Which of the following materials usually has an electromagnetic-induction device in its core?

  A. brass

  B. silver

  C. aluminum

  D. iron

  Correct Answer: D

  Iron is easily magnetized and demagnetized, so it works well for this device.

• Question 89:

  How many diodes should you expect to find in a bridge rectifier?

  A. 0

  B. 4

  C. 8

  D. 10

  Correct Answer: C

  A bridge rectifier is also known as a full wave rectifier, usually containing 8 diodes.

• Question 90:

  Ohm's law states __________.

  A. Voltage = Current ?Resistance

  B. Amperes = Current ?Resistance

  C. Voltage = Resistance ?Amperes

  D. Ohms = Voltage ?Current

  Correct Answer: A

  Ohm's law states that Voltage (V) = Current (I) ?Resistance (R). All other answers are incorrect expressions of this law.