ASVAB Electronics Information Practice Test 31104 Results

Your Results Global Average
Questions 5 5
Correct 0 3.05
Score 0% 61%

Review

1

Which of the following is the preferred method for splicing wires?

57% Answer Correctly

wrap in small gauge wire

wire crimps

soldering

screw-on connectors


Solution

Splicing is permanently joining two wires together. Splicing can be done with screw-on connectors or wire crimps but the preferred method for splicing is soldering. Soldering takes the most effort but results in a connection that is electrically and mechanically identical to the original wire.


2 How would you connect 8 [12V 5A] batteries to achieve a combined power output of 48V 20A?
67% Answer Correctly
orthogonal
series-parallel
perpendicular
series

Solution

Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 96V 5A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 40A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 48V 20A configuration.


3

The voltage output of a transformer primarily depends on which of the following?

57% Answer Correctly

the number of turns in the wire of the coils

the diameter of the wire in the coils

the conductor used for the wire in the coils

the diameter of the coils


Solution

A transformer utilizes an inductor to increase or decrease the voltage in a circuit. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil.


4

Electricity cannot flow...

72% Answer Correctly

through an open circuit

through a circuit under load

through a circuit with resistance

through a closed circuit


Solution

An electrical circuit is a path through which electricity flows. This path contains one or more components that create a load (something that is using electricity) and that load acts as resistance to the passage of electricity through the circuit. Electricity can only flow through a circuit when the path is closed and cannot flow through an open circuit.


5

Electromotive force is another name for:

53% Answer Correctly

voltage

power

energy

current


Solution

Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.