CETa Ultimate Practice Test Questions And Accurate Answers
What does the abbreviation ESD stand for?
Electrostatic Discharge
Current quantities between _____ and _____ are lethal.
100mA, 200mA
What is the primary concern with respect to electrical safety?
Shock
Bohr's Atomic Model is comprised of which three things?
Protons, neutrons and electrons
Electrons are arranged in _____ around a nucleus.
shells
Name three types of materials used in electronics
Conductors, semi-conductors and insulators
There are five common Classifications of fires in the United States. They are:
A, B, C, D, K.
Coulomb's Law describes the forces of attraction or repulsion between electrical
charges, which are ______________ to the product of the charges ______________ to the
distance between them.
directly proportional, inversely proportional
,A magnetic field that exists around a magnet can best be described as invisible lines of
force and is best known as:
lines of flux.
An analog multimeter (AMM) checks for:
voltage, current and resistance.
An oscilloscope with two vertical inputs, is commonly referred to as a _______
oscilloscope.
dual-trace
Voltage or potential difference is the measure of potential energy between two points in
a circuit and is generally referred to as :
voltage drop.
3 choice questions
What is impedance?
Resistance of a component at a given frequency
3 choice questions
A resistor has three colour bands, red, brown and brown. What is the ohmic value of this
resistor?
210 Ohms
3 choice questions
What component's value is measured in millihenries?
Inductor
Ohm's Law describes the relationship between:
power, resistance, current and voltage.
,Ohms Law says that resistance is found by voltage over current. Using Ohms law, what
is the formula for power?
Voltage times current
Using a scientific calculator, a 3300 ohm resistor can be entered using scientific
notation as:
3.3 * 10^3
Total resistance in series circuit is:
the sum of all the resistor values within the circuit.
If a series circuit has three resistors valued at 10k Ohms, 15k Ohms and 20k Ohms, with
a voltage source of 15V, the total current will be___.
333.33uA
Current in a parallel circuit is:
inversely proportional to the circuits resistance.
With three 2.5k resistors and one 3.4k resistor in parallel, the total resistance is:
669.29 Ohms
With one series 8 Ohm resistor connected to two in-parallel resistors, 20 and 30 ohms
respectively what is the total resistance (Rt)?
20 Ohms
Given a battery rated at 350 ampere-hours how many hours will the battery be able to
provide 7 amperes?
50
, The basic properties associated with alternating voltage and current are:
frequency, period, wavelength and amplitude.
Inductance in an inductor/coil varies as the _______ of the no. of turns.
Square
Two fundamental applications of transformers are:
signal matching and power supplies.
What is "transformer action"?
The transfer of energy from one circuit to another circuit by electromagnetic induction
What are the three fundamental components of a transformer?
Primary winding, secondary winding and core
Time it takes to charge a capacitor to 63 percent is called:
a time constant.
Find the capacitive reactance for 440 Hz. and 9µF.
40.21 Ohms
In a resistive-capacitive circuit the vector line relationship shows two lines
perpendicular to each other. What is the phase relationship?
90 degree
In a capacitive circuit, what is the voltage and current relationship?
Voltage lags
What does the abbreviation ESD stand for?
Electrostatic Discharge
Current quantities between _____ and _____ are lethal.
100mA, 200mA
What is the primary concern with respect to electrical safety?
Shock
Bohr's Atomic Model is comprised of which three things?
Protons, neutrons and electrons
Electrons are arranged in _____ around a nucleus.
shells
Name three types of materials used in electronics
Conductors, semi-conductors and insulators
There are five common Classifications of fires in the United States. They are:
A, B, C, D, K.
Coulomb's Law describes the forces of attraction or repulsion between electrical
charges, which are ______________ to the product of the charges ______________ to the
distance between them.
directly proportional, inversely proportional
,A magnetic field that exists around a magnet can best be described as invisible lines of
force and is best known as:
lines of flux.
An analog multimeter (AMM) checks for:
voltage, current and resistance.
An oscilloscope with two vertical inputs, is commonly referred to as a _______
oscilloscope.
dual-trace
Voltage or potential difference is the measure of potential energy between two points in
a circuit and is generally referred to as :
voltage drop.
3 choice questions
What is impedance?
Resistance of a component at a given frequency
3 choice questions
A resistor has three colour bands, red, brown and brown. What is the ohmic value of this
resistor?
210 Ohms
3 choice questions
What component's value is measured in millihenries?
Inductor
Ohm's Law describes the relationship between:
power, resistance, current and voltage.
,Ohms Law says that resistance is found by voltage over current. Using Ohms law, what
is the formula for power?
Voltage times current
Using a scientific calculator, a 3300 ohm resistor can be entered using scientific
notation as:
3.3 * 10^3
Total resistance in series circuit is:
the sum of all the resistor values within the circuit.
If a series circuit has three resistors valued at 10k Ohms, 15k Ohms and 20k Ohms, with
a voltage source of 15V, the total current will be___.
333.33uA
Current in a parallel circuit is:
inversely proportional to the circuits resistance.
With three 2.5k resistors and one 3.4k resistor in parallel, the total resistance is:
669.29 Ohms
With one series 8 Ohm resistor connected to two in-parallel resistors, 20 and 30 ohms
respectively what is the total resistance (Rt)?
20 Ohms
Given a battery rated at 350 ampere-hours how many hours will the battery be able to
provide 7 amperes?
50
, The basic properties associated with alternating voltage and current are:
frequency, period, wavelength and amplitude.
Inductance in an inductor/coil varies as the _______ of the no. of turns.
Square
Two fundamental applications of transformers are:
signal matching and power supplies.
What is "transformer action"?
The transfer of energy from one circuit to another circuit by electromagnetic induction
What are the three fundamental components of a transformer?
Primary winding, secondary winding and core
Time it takes to charge a capacitor to 63 percent is called:
a time constant.
Find the capacitive reactance for 440 Hz. and 9µF.
40.21 Ohms
In a resistive-capacitive circuit the vector line relationship shows two lines
perpendicular to each other. What is the phase relationship?
90 degree
In a capacitive circuit, what is the voltage and current relationship?
Voltage lags
