Basic electronic Flashcards
A special type of resistor that changes its resistance in response to temperature changes is called a
Thermistor
The flow of electrons in a circuit is measured in units called
Amperes
AC current can be converted to DC by using a device called a
Diode
The opposition to current flow in a circuit is measured in units called
Ohms
One complete reversal of the AC current flow is called a
Cycle
A special type of diode that lights up when current flows through it is the
LED
Electric pressure in a circuit is measured in units called
Volts
One metal that’s frequently used to make electrical wires because its such a good conductor is
Copper
The two ends of a Diode are called
The Anode and the Cathode
The Frequency of AC current is measured in units called
Hertz
The internal circuits in most electronics equipment operate on AC current
False
A high resistance device will allow less current to pass through it than a low resistance device
True
Sensors are used to convert a measured physical quantity into an electrical signal
True
Printed circuit boards are used to connect components in modern electronic equipment
True
Blindness can result from unsafe behavior in the presence of high powered laser equipment
True
Electrical shock isn’t a significant hazard to telecommunications technicians, since they never work around high voltages
False
A safety procedure in which a circuit’s switch or breaker is locked and marked with the name of the technician working on the circuit is called a
Lock out, tag out
Ring, watches, and other jewelry shouldn’t be worn when working on electronic equipment
True
If an electrical fault causes the cover of a piece of equipment to conduct electricity, a technician who touched the cover would receive a (N)
Electrical shock
It sufficient to switch off a piece of electrical equipment before servicing it. Unplugging the equipment isn’t generally a required safety practice
False
Name three areas of communications that the new telecommunication Act of 1996 will affect
1- Telephone Service
2- Cable Television
3- The internet and online computer services
Name three job titles that are commonly by electronics tecknician
1- Service Technicians
2- Central office Technicians
3- Industrial electronics Technicians
Name three organizations where electronics technicians may be employeed
1- Equipment manufacturers
2- Equipment maintenance firms
3- Private companies that use a lot of electrical equipment
Name 4 things that can damage sensitive electronic equipment
1- Electro magnetic fields
2- Moisture
3- Static electricity
4- Dirt and dusts particles
When electric current is flowing in a circuit, if the voltage applied to the circuit is increased,
the current will increase
Which of the following information sources will not be directly affected by the telecommunication acts of 1996? Telephone services, The internet, Newspaper publishing, Cable television
Newspaper publishing
Porcelain, paper, glass and rubber are all examples of electrical
insulators
A testing instrument that an electronics technician will connect to selected points inside a piece of electronic equipment and measure electrical values such as ohms, volts, and amperes is called
A multimeter
What is rectification?
Rectification is the conversion of AC current to DC current.
At a job interview, the most effective way to prove your proficiency to a prospective employer is to show that you have
Certification as an electronics technician
Which one of the following letters is used as un abbreviation when representing a unit of electric current?
A
Light-emitting diodes are used as
Indicators in circuits
On a printed circuit board, electronic components will be mounted
from the substrate side of the board
Resistance is measured in units called
Ohms
When you see a lock out tag out card on a switch what should you do before take it out?
Operate this switch only after getting permission from the person who signed the tag
A testing instrument that’s used to measure electrical signals in a circuit and display them as wave forms on a screen is called
an oscilloscope
What is the first step in a lockout - and -tag procedure?
Shut off the electricity to the machine at the breaker
An electronics technician who enjoys working “at the bench” would most likely want to work
For a manufacturer.
