ASVAB PRACTICE TEST 1 - SECTION 6 - ELECTRONICS

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ASVAB PRACTICE TEST 1 - SECTION 6 - ELECTRONICS

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Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -20 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: What is the approximate characteristic voltage that develops across a red LED?a) 1.7v b) 3.4v c) 5v d) 0.6v

Answer:

• 1.7v

A LED (Light Emitting Diode) that is red is powered by 1.7 volts.Question 2: When working on live 600-volt equipment where rubber gloves might be damaged, an electrician should a) work without gloves.

b) carry a spare pair of rubber gloves.c) reinforce the fingers of the rubber gloves with rubber tape.d) wear leather gloves over the rubber gloves.

Answer:

• wear leather gloves over the rubber gloves.

Leather gloves offer the best protection over the rubber gloves. The leather can withstand severe conditions before it will tear. The rubber acts as insulation.Question 3: The current in the wire at the point indicated by the arrow above is a)

• ampere.

b)

• amperes.

c)

• amperes.

d)

• amperes.

Answer:

• 2 amperes

The formula for determining the current in a parallel circuit is: It = I1 + I2 + I3 + ... In. The current going through the lamps is 1 amp + 1 amp = 2 amps.Question 4: The following equipment is required for a "2-line return-call" electric bell circuit: a)

• bells, 2 metallic lines, 2 ordinary push buttons, and 1 set of batteries.

b)

• bells, 2 metallic lines, 2 return-call push buttons, and 2 sets of batteries.

c)

• bells, 2 metallic lines, 2 return-call push buttons, and 1 set of batteries.

d)

• bells, 2 metallic lines, 1 ordinary push button, 1 return-call push button, and 1 set of batteries.

Answer:

• 2 bells, 2 metallic lines, 2 return-call push buttons, and 2 sets of batteries.

A "2-line returncall" electric bell circuit would have 2 bells, 2 metallic lines, 2 return-call push buttons,

and 2 sets of batteries. It might look like this:

Question 5: The term that is NOT applicable in describing the construction of a microphone is a) dynamic.b) carbon.c) crystal.d) feedback.

Answer:

• feedback

Carbon, crystal, and dynamic are all types of microphones. Feedback is a condition caused when sound coming from a speaker is fed back into a microphone, causing noise.

Question 6: A "mil" measures a(n)

a) eighth of an inch.b) millionth of an inch.c) thousandth of an inch.d) ten-thousandth of an inch.

Answer:

• thousandth of an inch.

A "mil" is short for milli or 1/1,000 of an inch.

Question 7: Neutral wire can be quickly recognized by the

a) greenish color.b) bluish color.c) natural or whitish color.d) black color.

Answer:

• Natural or whitish color

The neutral wire is whitish in color; the hot lead is black; and the ground wire is green.

Question 8: Rosin is a material generally used

a) in batteries.b) for high-voltage insulation.c) as a dielectric.d) as a soldering flux.

Answer:

• as a soldering flux

Rosin is used to remove copper-oxide from wires so that the solder can join the copper wires.Question 9: The electrical contacts in the tuner of a television set are usually plated with silver.Silver is used to a) avoid tarnish.b) improve conductivity.