ASVAB ASVAB Certifications ASVAB-SECTION-5 Questions & Answers

• Question 1:

  Which of these is a symbol for a fuse?

  A.

  B.

  C.

  D.

  Correct Answer: B

  The symbols shown are for the resistor, the fuse, and the capacitor, as well as for a lamp or light bulb. The one for the fuse is shown as in B.

• Question 2:

  A parallel circuit with resistors of 10 ohms, 10 ohms, and 5 ohms has a total resistance of __________.

  A. 10 ohms

  B. 5 ohms

  C. 25 ohms

  D. 2.5 ohms

  Correct Answer: D

  Total resistance of a parallel circuit can be found two ways: by using the reciprocal formula or by using the

  product of two resistors divided by the sum of the two resistors divided by the sum of the two and then

  using it again to obtain the final answer in the case of three in parallel.

  In this case the two 10-ohm resistors will reduce to an equivalent of 5 ohms.

  This leaves, then, two 5-ohm resistors in parallel, which reduce to 2.5 or half of the value of one.

• Question 3:

  The Greek letter phi () is used to __________.

  A. indicate ohms

  B. indicate angles or phases

  C. indicate volts

  D. indicate dielectric flux

  Correct Answer: B

  The Greek alphabet is used almost in its entirety in the electrical field to represent various quantities and effects. The Greek letter phi () is familiar if you have been looking at three-phase power. It is used to represent the phases of electrical power.

• Question 4:

  A watt is the power that gives rise to the production of energy at the rate of __________.

  A. 1 joule per minute

  B. 1 volt per second

  C. 1 amp per second

  D. 1 joule per second

  Correct Answer: D

  The watt is the unit of power in electrical work. It is defined as the production of energy at the rate of one joule per second (per second is the basis for all electrical work).

• Question 5:

  Opposition to current flow is measured in __________.

  A. ohms

  B. amps

  C. volts

  D. watts

  Correct Answer: A

  The unit of measure for resistance or opposition to current flow is the ohm. It was agreed on many years ago and has aided in making the electrical field progress so rapidly.

• Question 6:

  An insulator is a material with __________.

  A. many free electrons

  B. few free electrons

  C. many free protons

  D. many free ions

  Correct Answer: B

  An insulator is a material that has tightly held electrons and very few, if any, free electrons.

  This means that it can be used to protect the conductor since the insulator will not allow free electrons from

  the conductor to knock lose any tightly held electrons of the insulator material.

• Question 7:

  Electron flow is from __________.

  A. + to +

  B. - to +

  C. + to

  D. - to

  Correct Answer: B

  Electron flow can be demonstrated to flow from - to +. The action that takes place in a vacuum tube indicates that the + attracts the - electron to cause it to move from - to +.

• Question 8:

  Convention current flow is from __________.

  A. + to +

  B. - to +

  C. + to

  D. - to

  Correct Answer: C

  Conventional current flow is said to be from + to -. This idea was originally used by Ben Franklin to explain

  the conduct of lightning.

  This conventional flow is still used today by electrical engineers and people working in physics.

• Question 9:

  A conductor is any material that __________.

  A. has no free electrons

  B. has many free electrons

  C. has free ions

  D. has free protons

  Correct Answer: B

  Conductors have free electrons that are easily moved along with the right kind of push or force. There are a number of ways to cause these electrons to progress along a conductor. Heat, light, magnetism, chemicals, pressure, and friction can cause the generation of an EMF useful in causing electrons to move along a conductor.

• Question 10:

  Electricity is defined as __________.

  A. the flow of electrons along a conductor

  B. the flow of ions along a conductor

  C. the movement of charges

  D. static electricity

  Correct Answer: A

  The definition of current electricity is the flow of electrons. Static electricity is conceived of as standing still or collecting on surfaces