Electronics ETA Certification Practice Exam
The "triboelectric effect" causes what kind of electricity? - Answer-Static
The law of static electrical charges states: - Answer-like charges repel
Minute particles that make up all possible elements and still retain the unique chemical
characteristics of the element are called _____________. - Answer-Atoms
A molecule is the smallest particle of matter that can exist by itself. (1) - Answer-True (1)
A basic atom must contain what two types of subatomic particles? - Answer-Electron and proton
An electron has _______________. - Answer-a Negative charge
What two types of energy are used throughout electronics? - Answer-Kinetic and potential
Electrical direct current flowing in a wire produces a magnetic field: - Answer-at right angles to
current flow
A material is magnetized when the: - Answer-domains are in alignment
A material that can be magnetized easily falls into this category: - Answer-Ferromagnetic
Invisible lines of force that surround a magnet are called ___________________. - Answer-
magnetic flux lines
The pole of a magnet from which flux leaves is called the __________________. - Answer-north
_________________ force produces magnetic flux. - Answer-Magnetomotive
What class of fire extinguisher is used on an oil fire? - Answer-B
It is dangerous to use wooden handled tools around high voltage due to their ability to absorb
moisture. (2) - Answer-True (2)
In order to eliminate possible fire hazards, rags should be stored in ________________ -
Answer-metal containers
When an individual receives an electrical shock, an immediate symptom can be
_______________. - Answer-Cardiac arrest
What happens as protective eye goggles age? - Answer-Their resistance to scratching decreases
, Safety precautions to be followed when working on high-voltage equipment include which of the
following? - Answer-All jewelry should be removed
The main purpose of a safety observer is to: - Answer-turn off equipment in use and apply
emergency first aid or cardiopulmonary resuscitation if needed
You should use caution when talking to someone who is operating electrical equipment because
the distraction: - Answer-• could damage the equipment
• both could be injured
• could ruin an electronic device
Which device would most likely include a light level meter? - Answer-Camera
The most common functions of a generic multimeter are _________________________. -
Answer-voltmeter, ammeter and ohmmeter
Digital multimeters eliminate which of the following disadvantages of analog meters? - Answer-
• Low impedance
• Poor accuracy
• Parallax errors
The Wheatstone bridge can be used for precision measurements of: - Answer-resistance
The ammeter setting on a multimeter indicates what type of reading? - Answer-current
A resistor with color bands of blue, gray and black has a value of _______________. - Answer-
68 ohms 20%
A/an _____________ allows current to flow easily. - Answer-conductor
A/an _________________ stops the flow of current. - Answer-insulator
A component whose value is measured in microfarads is a: - Answer-capacitor
A component whose value is measured in ohms is a: - Answer-resistor
Switches are rated in maximum ___________ and ______________. (1) - Answer-current,
voltage (1)
Fuses are rated in maximum _____________ and ______________. - Answer-current, voltage
In an electrical circuit where the voltage and resistance are known, which form of Ohm's law is
used to find the circuit current? - Answer-I = E/R
A unit of energy is the: - Answer-Joule
The "triboelectric effect" causes what kind of electricity? - Answer-Static
The law of static electrical charges states: - Answer-like charges repel
Minute particles that make up all possible elements and still retain the unique chemical
characteristics of the element are called _____________. - Answer-Atoms
A molecule is the smallest particle of matter that can exist by itself. (1) - Answer-True (1)
A basic atom must contain what two types of subatomic particles? - Answer-Electron and proton
An electron has _______________. - Answer-a Negative charge
What two types of energy are used throughout electronics? - Answer-Kinetic and potential
Electrical direct current flowing in a wire produces a magnetic field: - Answer-at right angles to
current flow
A material is magnetized when the: - Answer-domains are in alignment
A material that can be magnetized easily falls into this category: - Answer-Ferromagnetic
Invisible lines of force that surround a magnet are called ___________________. - Answer-
magnetic flux lines
The pole of a magnet from which flux leaves is called the __________________. - Answer-north
_________________ force produces magnetic flux. - Answer-Magnetomotive
What class of fire extinguisher is used on an oil fire? - Answer-B
It is dangerous to use wooden handled tools around high voltage due to their ability to absorb
moisture. (2) - Answer-True (2)
In order to eliminate possible fire hazards, rags should be stored in ________________ -
Answer-metal containers
When an individual receives an electrical shock, an immediate symptom can be
_______________. - Answer-Cardiac arrest
What happens as protective eye goggles age? - Answer-Their resistance to scratching decreases
, Safety precautions to be followed when working on high-voltage equipment include which of the
following? - Answer-All jewelry should be removed
The main purpose of a safety observer is to: - Answer-turn off equipment in use and apply
emergency first aid or cardiopulmonary resuscitation if needed
You should use caution when talking to someone who is operating electrical equipment because
the distraction: - Answer-• could damage the equipment
• both could be injured
• could ruin an electronic device
Which device would most likely include a light level meter? - Answer-Camera
The most common functions of a generic multimeter are _________________________. -
Answer-voltmeter, ammeter and ohmmeter
Digital multimeters eliminate which of the following disadvantages of analog meters? - Answer-
• Low impedance
• Poor accuracy
• Parallax errors
The Wheatstone bridge can be used for precision measurements of: - Answer-resistance
The ammeter setting on a multimeter indicates what type of reading? - Answer-current
A resistor with color bands of blue, gray and black has a value of _______________. - Answer-
68 ohms 20%
A/an _____________ allows current to flow easily. - Answer-conductor
A/an _________________ stops the flow of current. - Answer-insulator
A component whose value is measured in microfarads is a: - Answer-capacitor
A component whose value is measured in ohms is a: - Answer-resistor
Switches are rated in maximum ___________ and ______________. (1) - Answer-current,
voltage (1)
Fuses are rated in maximum _____________ and ______________. - Answer-current, voltage
In an electrical circuit where the voltage and resistance are known, which form of Ohm's law is
used to find the circuit current? - Answer-I = E/R
A unit of energy is the: - Answer-Joule
