2A652 CDC Pretest Volume 2
Questions and Answers
- 1.
Every atom must contain what types of particles?
- A.
Electrons and protons
- B.
Electrons and neutrons
- C.
Protons and neutrons
- D.
Electrons, protons, and neurons
Correct Answer
A. Electrons and protonsExplanation
Atoms are made up of three types of particles: electrons, protons, and neutrons. Electrons have a negative charge and are located in the electron cloud surrounding the nucleus. Protons have a positive charge and are located in the nucleus. Neutrons have no charge and are also located in the nucleus. Therefore, the correct answer is electrons and protons, as both of these particles are present in every atom.Rate this question:
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- 2.
An atom with eight electrons in its outermost shell is said to be
- A.
Free
- B.
Stable
- C.
Valence
- D.
Ionized
Correct Answer
B. StableExplanation
An atom with eight electrons in its outermost shell is said to be stable. This is because the outermost shell, also known as the valence shell, is considered to be complete when it contains eight electrons. This configuration is known as the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a stable configuration with eight electrons in the valence shell. Therefore, an atom with eight electrons in its outermost shell is considered stable.Rate this question:
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- 3.
How many valence electrons are needed to make a good conductor?
- A.
3
- B.
4
- C.
5
- D.
6
Correct Answer
A. 3Explanation
A good conductor needs only 3 valence electrons. Valence electrons are the electrons in the outermost shell of an atom, and they determine the atom's reactivity and ability to form bonds. In the context of conductivity, materials with fewer valence electrons are typically better conductors because they have more loosely held electrons that can move freely and carry electric charge. Therefore, having only 3 valence electrons would make a material a good conductor.Rate this question:
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- 4.
"Dielectric" is the term used for
- A.
Conductors
- B.
Insulators
- C.
Doped atoms
- D.
Semi-conductors
Correct Answer
B. InsulatorsExplanation
The term "dielectric" is used to refer to insulators. Dielectrics are materials that do not conduct electricity easily and have high resistance to the flow of electric current. They are commonly used in electrical insulation to prevent the flow of electricity and to store electrical energy in capacitors. Unlike conductors, which allow the flow of electric charges, dielectrics act as insulators by blocking the movement of electrons. Therefore, the correct answer is insulators.Rate this question:
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- 5.
"The flow or drift of electrons through a conductor" in the same direction at the same time is the definition of
- A.
Conductivity
- B.
Voltage
- C.
Current
- D.
Valance
Correct Answer
C. CurrentExplanation
Current is the correct answer because it refers to the flow or drift of electrons through a conductor in the same direction at the same time. Conductivity refers to the ability of a material to conduct electricity, voltage refers to the electric potential difference between two points, and valance refers to the combining capacity of an element.Rate this question:
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- 6.
The potential difference between two points in a circuit that exerts a force on free electons is called
- A.
Conductivity
- B.
Voltage
- C.
Current
- D.
Valence
Correct Answer
B. VoltageExplanation
Voltage is the correct answer because it refers to the potential difference between two points in a circuit. This potential difference is responsible for exerting a force on free electrons, causing them to move and create an electric current. Conductivity refers to the ability of a material to conduct electricity, while current refers to the flow of electric charge. Valence, on the other hand, is a term used in chemistry to describe the combining capacity of an element.Rate this question:
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- 7.
What is used to control current flow in a circuit?
- A.
Voltage
- B.
Coulombs
- C.
Resistance
- D.
Conductivity
Correct Answer
C. ResistanceExplanation
Resistance is used to control current flow in a circuit. It is a measure of how much a material or component opposes the flow of electric current. When resistance is increased, the current flow decreases, and when resistance is decreased, the current flow increases. This property allows resistance to be used to regulate the amount of current flowing through a circuit.Rate this question:
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- 8.
The relationship of voltage, current, and resistance is expressed through
- A.
E,I, and C
- B.
Power formulas
- C.
Conductance
- D.
Ohm's Law
Correct Answer
D. Ohm's LawExplanation
Ohm's Law is the correct answer because it describes the relationship between voltage, current, and resistance in an electrical circuit. According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor. This relationship is expressed mathematically as I = V/R, where I is the current, V is the voltage, and R is the resistance. Ohm's Law is a fundamental principle in electrical engineering and is used to calculate and analyze various aspects of electrical circuits.Rate this question:
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- 9.
Total current in a series circuit is equal to the
- A.
Current through one component
- B.
Sum of the current through each component
- C.
Reciprocal of the current through each component
- D.
Reciprocal of the sum of the currents through each component
Correct Answer
A. Current through one componentExplanation
In a series circuit, the current remains the same throughout the circuit. This means that the current through one component is equal to the current through any other component in the circuit. Therefore, the total current in a series circuit is equal to the current through one component.Rate this question:
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- 10.
What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
- A.
.14 watts (w)
- B.
.14 kilowatts (kw)
- C.
3.92 w
- D.
3.92 kw
Correct Answer
D. 3.92 kwExplanation
The wattage of a circuit can be calculated using the formula P = V^2 / R, where P is the power in watts, V is the voltage in volts, and R is the resistance in ohms. In this case, the voltage is 28 volts and the resistance is 0.2 ohms. Plugging these values into the formula, we get P = (28^2) / 0.2 = 784 / 0.2 = 3920 watts, which is equal to 3.92 kilowatts (kw).Rate this question:
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- 11.
In a parallel circuit, the total voltage is equal to the
- A.
Sum of the voltages across each branch
- B.
Voltage across each resistor
- C.
Voltage across each branch
- D.
The reciprocal of the voltage across the resistances
Correct Answer
C. Voltage across each branchExplanation
In a parallel circuit, the total voltage is equal to the voltage across each branch. This means that the voltage across each branch is the same and equal to the total voltage of the circuit. In a parallel circuit, the current splits up and flows through each branch independently, but the voltage across each branch remains constant. Therefore, the correct answer is "voltage across each branch".Rate this question:
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- 12.
Source current in a parallel circuit will be divided according to branch
- A.
Voltage
- B.
Powers
- C.
Lengths
- D.
Resistances
Correct Answer
D. ResistancesExplanation
In a parallel circuit, the source current will be divided among the different branches based on their respective resistances. The branch with a lower resistance will allow more current to flow through it, while the branch with a higher resistance will have less current flowing through it. This is because the resistance determines how much the current is impeded in each branch. Therefore, the statement that the source current in a parallel circuit will be divided according to resistances is correct.Rate this question:
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- 13.
The areas around a magnet where its influence can be felt is the definition of the
- A.
Saturation principle
- B.
Magnetic theory
- C.
Magnetic field
- D.
Law of attraction and repulsion
Correct Answer
C. Magnetic fieldExplanation
A magnetic field refers to the areas around a magnet where its influence can be felt. It is the region in which magnetic forces are exerted on other magnetic objects or charged particles. The concept of a magnetic field is fundamental in understanding the behavior of magnets and their interactions with other objects.Rate this question:
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- 14.
"The ability of a material to pass lines of force" is a definition of
- A.
Permeability
- B.
Reluctance
- C.
Electromagnetism
- D.
Retentivity
Correct Answer
A. PermeabilityExplanation
Permeability refers to the ability of a material to allow lines of force to pass through it. It is a measure of how easily magnetic flux can pass through a substance. This property is important in determining the behavior of magnetic fields and is commonly used in the design and analysis of electromagnetic devices such as transformers and inductors.Rate this question:
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- 15.
The magnetism that remains after the magnetizing force has been removed is known as
- A.
Electromagnetism
- B.
Molecular magnetism
- C.
Permeability
- D.
Residual magnetism
Correct Answer
D. Residual magnetismExplanation
Residual magnetism refers to the magnetism that remains in a material even after the magnetizing force has been removed. This phenomenon occurs due to the alignment of magnetic domains within the material. When a magnetic material is magnetized, the magnetic domains align in a specific direction. Even after the external magnetizing force is removed, some of these domains remain aligned, resulting in residual magnetism. This residual magnetism can be observed in materials such as iron or steel, where the material retains a magnetic field even when not in the presence of an external magnetic field.Rate this question:
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- 16.
The magnetic field of an electromagnet can be varied by changing the
- A.
Type of core
- B.
Number of turns in the coil
- C.
Amount of current throught the coil
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
The magnetic field of an electromagnet can be varied by changing the type of core, the number of turns in the coil, and the amount of current through the coil. The type of core affects the magnetic permeability, which determines how easily the magnetic field can be established. Increasing the number of turns in the coil increases the strength of the magnetic field. Finally, increasing the amount of current flowing through the coil increases the strength of the magnetic field according to Ampere's Law. Therefore, all of these factors can individually or collectively affect the magnetic field of an electromagnet.Rate this question:
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- 17.
The electromechanical generation of a voltage requires a magnetic field, relative motion, and
- A.
A complete circuit
- B.
A conductor
- C.
An insulator
- D.
A load
Correct Answer
B. A conductorExplanation
In order to generate a voltage electromechanically, a conductor is required. A conductor is a material that allows the flow of electric current. When a conductor moves relative to a magnetic field, it induces a voltage in the conductor according to Faraday's law of electromagnetic induction. This voltage can be generated only if there is a complete circuit, which allows the flow of current from the conductor. Therefore, a conductor is necessary for the electromechanical generation of a voltage.Rate this question:
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- 18.
The principle behind all electromechanical generation is
- A.
Conduction
- B.
Commutation
- C.
Rectification
- D.
Electromagnetic induction
Correct Answer
D. Electromagnetic inductionExplanation
Electromagnetic induction is the principle behind all electromechanical generation. This process involves the generation of an electric current in a conductor when it is exposed to a changing magnetic field. When a conductor moves through a magnetic field or when the magnetic field around a conductor changes, it induces a voltage in the conductor, resulting in the generation of electricity. This principle is fundamental to the functioning of generators, transformers, and other electromechanical devices used for power generation and transmission.Rate this question:
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- 19.
The function of the commutator in a DC generator is to
- A.
Complete the circuit to the load
- B.
Induce DC into the external circuit
- C.
Rectify the input
- D.
Change AC voltage to DC voltage
Correct Answer
D. Change AC voltage to DC voltageExplanation
The commutator in a DC generator is responsible for converting the alternating current (AC) produced in the armature coils into direct current (DC). It achieves this by reversing the current flow in the armature coils at the appropriate time, ensuring that the output current from the generator flows in only one direction. This process of reversing the current direction allows the generator to produce a steady and continuous DC voltage, which is essential for powering devices that require a constant source of electrical energy.Rate this question:
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- 20.
Because an inductor stores energy and then returns it to the circuit, it is called a
- A.
Resistive device
- B.
Reactive device
- C.
Retentive device
- D.
Retroactive device
Correct Answer
B. Reactive deviceExplanation
An inductor is called a reactive device because it stores energy in its magnetic field and releases it back to the circuit when the current changes. Unlike a resistive device that dissipates energy in the form of heat, an inductor does not consume power but instead reacts to changes in current by storing or releasing energy. This reactive behavior is characteristic of inductors and distinguishes them from other types of devices.Rate this question:
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- 21.
An inductor stores enegy in the form of
- A.
Heat
- B.
Resistance
- C.
A magnetic field
- D.
An electrostatic field
Correct Answer
C. A magnetic fieldExplanation
An inductor is a passive electronic component that stores energy in the form of a magnetic field. When a current flows through an inductor, the magnetic field is created, and this magnetic field stores the energy. This stored energy can then be released back into the circuit when the current changes or stops flowing. Therefore, the correct answer is that an inductor stores energy in the form of a magnetic field.Rate this question:
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- 22.
The process by which a current change in one coil produces a voltage in another coil is called
- A.
Inductance
- B.
Self-induction
- C.
Mutual induction
- D.
None of the above
Correct Answer
C. Mutual inductionExplanation
Mutual induction is the process by which a changing current in one coil induces a voltage in another coil. This occurs when the magnetic field generated by the changing current in the first coil passes through the second coil, causing a voltage to be induced in it. This phenomenon is commonly used in transformers and other electrical devices to transfer energy from one coil to another. Inductance refers to the ability of a coil to store energy in its magnetic field, while self-induction specifically refers to the voltage induced in a coil due to its own changing current. Therefore, the correct answer is mutual induction.Rate this question:
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- 23.
A transformer will change all of the following except
- A.
Power
- B.
Current
- C.
Voltage
- D.
Resistance
Correct Answer
A. PowerExplanation
A transformer is an electrical device that can change the voltage of an alternating current (AC) while keeping the power constant. It works on the principle of electromagnetic induction. When the voltage is stepped up or stepped down, the current and resistance may change accordingly, but the power remains the same. Therefore, a transformer will change the current, voltage, and resistance, but it will not change the power.Rate this question:
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- 24.
Normally, the winding of a transformer that is connected to a power source is known as the
- A.
Field winding
- B.
Primary winding
- C.
Current winding
- D.
Secindary winding
Correct Answer
B. Primary windingExplanation
The winding of a transformer that is connected to a power source is known as the primary winding. This is because the primary winding is responsible for receiving the input voltage from the power source and transferring it to the secondary winding. The primary winding typically has a higher number of turns compared to the secondary winding, allowing it to step up or step down the voltage as required by the transformer.Rate this question:
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- 25.
What kind of turns of wire is found in the secondary windings of a step up transformer?
- A.
Equal
- B.
Less
- C.
More
- D.
All of the above
Correct Answer
C. MoreExplanation
In a step-up transformer, the secondary windings have more turns of wire compared to the primary windings. This is because the transformer is designed to increase the voltage from the input side to the output side. By having more turns in the secondary windings, the transformer can step up the voltage while maintaining the same power. Therefore, the correct answer is "More".Rate this question:
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- 26.
A relay is an electrically operated
- A.
Meter
- B.
Motor
- C.
Switch
- D.
Safety device
Correct Answer
C. SwitchExplanation
A relay is an electrically operated switch. It is a device that allows a small electrical current to control a larger one, by using an electromagnet to mechanically open or close a circuit. Relays are commonly used in electrical systems to control high-power devices, such as motors or lights, with a low-power signal. They provide a safe and efficient way to control the flow of electricity in a circuit.Rate this question:
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- 27.
A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
- A.
Locking relay
- B.
Latching relay
- C.
Timing relay
- D.
Tripping relay
Correct Answer
B. Latching relayExplanation
A latching relay is a type of relay that requires a second coil to be energized in order for the contacts to return to their original positions. This means that once the relay is energized, it will remain in that state until the second coil is energized, which will then reset the contacts back to their original positions. This type of relay is commonly used in applications where it is necessary to maintain a specific state or position until a specific condition is met.Rate this question:
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- 28.
A capacitor stores energy in the form of
- A.
Heat
- B.
Resistance
- C.
A magnetic field
- D.
An electrostatic field
Correct Answer
D. An electrostatic fieldExplanation
A capacitor stores energy in the form of an electrostatic field. When a voltage is applied across the capacitor, it creates an electric field between its plates. This electric field stores energy in the form of electrostatic potential energy. The energy is stored in the electric field until it is discharged or used in a circuit. Capacitors are commonly used in electronic devices to store and release electrical energy efficiently.Rate this question:
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- 29.
In a capacitor, the dielectric is the
- A.
Positive lead
- B.
Conductor
- C.
Insulator
- D.
Outer case
Correct Answer
C. InsulatorExplanation
In a capacitor, the dielectric is the insulator. A dielectric is a material that is placed between the two plates of a capacitor to increase its capacitance. It acts as an electrical insulator, preventing the flow of direct current between the plates while allowing the storage of electric charge. The dielectric material can be made of various substances, such as ceramic, plastic, or paper, which have high resistivity and low conductivity. By using a dielectric, the capacitance of the capacitor can be increased, allowing it to store more charge for a given voltage.Rate this question:
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- 30.
Opposition of a capacitor to AC is called
- A.
Inductive reactance
- B.
Impedance
- C.
Capacitive reactance
- D.
Capacitance
Correct Answer
C. Capacitive reactanceExplanation
Capacitive reactance is the opposition of a capacitor to AC. It is a measure of how a capacitor resists the flow of alternating current. When an AC signal is applied to a capacitor, the capacitor charges and discharges, causing a phase shift between the voltage and current. This opposition to the flow of current is known as capacitive reactance. It is represented by the symbol Xc and is inversely proportional to the frequency of the AC signal and the capacitance of the capacitor. As the frequency increases, the capacitive reactance decreases, allowing more current to flow through the capacitor.Rate this question:
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- 31.
The factors which determine the time required to charge a capacitor are the capacitance and the
- A.
Applied voltage
- B.
Circuit current
- C.
Amount of resistance
- D.
Type of dielectric
Correct Answer
C. Amount of resistanceExplanation
The time required to charge a capacitor is determined by the amount of resistance in the circuit. Higher resistance will result in a slower charging time, while lower resistance will allow the capacitor to charge more quickly. This is because resistance limits the flow of current in the circuit, and the charging of a capacitor relies on the flow of current. Therefore, the amount of resistance plays a crucial role in determining the time it takes for a capacitor to charge.Rate this question:
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- 32.
The anode of a diode is constructed of
- A.
Neutral material
- B.
Biased material
- C.
Positive material
- D.
Negative material
Correct Answer
C. Positive materialExplanation
The anode of a diode is constructed of positive material because it is the terminal through which current flows into the diode. In a diode, current can only flow from the anode (positive terminal) to the cathode (negative terminal), making the anode positive with respect to the cathode. This construction allows the diode to function as a one-way valve for electric current, allowing current to flow in only one direction.Rate this question:
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- 33.
Expanding or contracting the depletion region of a diode is called
- A.
Basing
- B.
Gating
- C.
Spiking
- D.
Biasing
Correct Answer
D. BiasingExplanation
Biasing refers to the process of applying a specific voltage to a semiconductor device, such as a diode, in order to establish the desired operating conditions. By applying a bias voltage, the depletion region of the diode can be expanded or contracted, which affects its ability to conduct current. This allows for control over the diode's behavior and ensures that it operates within its desired range.Rate this question:
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- 34.
A diode placed in a circuit in reverse bias is being used as
- A.
A spike protector
- B.
An amplifier
- C.
A regulator
- D.
A rectifier
Correct Answer
A. A spike protectorExplanation
When a diode is placed in reverse bias, it acts as a spike protector. In this configuration, the diode allows current to flow in the reverse direction only when a voltage spike occurs. This helps to protect the circuit from high voltage spikes that could potentially damage other components. By effectively blocking the spikes, the diode ensures that only the desired voltage levels pass through the circuit, providing protection against sudden voltage surges. Therefore, a diode in reverse bias is commonly used as a spike protector.Rate this question:
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- 35.
A zener will conduct in reverse bias
- A.
For a second or two at a time
- B.
Until gate potential has been reached
- C.
Once the avalanche point has been reached
- D.
Until the breakdown point has been reached
Correct Answer
C. Once the avalanche point has been reachedExplanation
Once the avalanche point has been reached, a zener diode will start to conduct in reverse bias. This is because at the avalanche point, the electric field across the depletion region becomes strong enough to cause the generation of electron-hole pairs through the process of impact ionization. This leads to a rapid increase in the reverse current flowing through the diode, allowing it to conduct. Therefore, once the avalanche point is reached, the zener diode will conduct in reverse bias.Rate this question:
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- 36.
A zener being used as a regulator must have a resistor placed in the circuit in
- A.
Series
- B.
Parallel
- C.
Reverse bias
- D.
Series-parallel
Correct Answer
A. SeriesExplanation
When a zener diode is used as a regulator, it is necessary to have a resistor placed in series with it. This resistor limits the current flowing through the zener diode and prevents it from getting damaged due to excessive current. By placing the resistor in series, the current flowing through both the zener diode and the resistor is the same, ensuring that the zener diode operates within its specified current range. Therefore, series is the correct answer.Rate this question:
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- 37.
What is the approximate operating voltage of a LED?
- A.
.5 volts
- B.
.1 volt
- C.
1.6 volts
- D.
2.4 volts
Correct Answer
C. 1.6 voltsExplanation
LEDs (Light Emitting Diodes) are semiconductor devices that emit light when an electric current is applied to them. The approximate operating voltage of an LED is typically around 1.6 volts. This voltage is necessary to overcome the forward voltage drop across the diode junction and allow current to flow through the LED, causing it to emit light. Different types of LEDs may have slightly different operating voltages, but 1.6 volts is a common approximation.Rate this question:
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- 38.
The SCR has how many PN junctions?
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
C. ThreeExplanation
The Silicon Controlled Rectifier (SCR) has three PN junctions. The PN junctions are formed by the combination of P-type and N-type semiconductor materials. These junctions play a crucial role in the operation of the SCR, allowing it to control the flow of current in a circuit. The three junctions in the SCR are known as the anode-cathode junction, the anode-gate junction, and the cathode-gate junction. Each junction serves a specific purpose in regulating the SCR's conduction and blocking states.Rate this question:
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- 39.
The amount of current required to gate an SCR is called
- A.
Forward breakover voltage
- B.
Holding current
- C.
Peak voltage
- D.
Gate current
Correct Answer
A. Forward breakover voltageExplanation
The forward breakover voltage refers to the minimum voltage required to trigger the SCR and allow current flow through the device. It is the voltage level at which the SCR switches from its non-conducting state to its conducting state. This voltage is applied to the gate terminal of the SCR to initiate conduction. The forward breakover voltage is a critical parameter in SCR circuits as it determines the point at which the device starts conducting and allows current to flow.Rate this question:
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- 40.
In order for an SCR to be turned off
- A.
The forward breakover voltage must exceed the holding voltage
- B.
The current must drop below the holding current
- C.
The negative amp switch must activate
- D.
The negative volt switch must activate
Correct Answer
B. The current must drop below the holding currentExplanation
To turn off an SCR (Silicon Controlled Rectifier), the current flowing through it must drop below the holding current. The holding current is the minimum current required to keep the SCR in the on state. Once the current falls below this threshold, the SCR will turn off and stop conducting. This is because the SCR is a latching device that requires a specific level of current to maintain conduction.Rate this question:
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- 41.
The best method of troubleshooting is the
- A.
Systematic method
- B.
Instantaneous method
- C.
Hit-and-miss method
- D.
Trial-and-error method
Correct Answer
A. Systematic methodExplanation
The systematic method is the best method of troubleshooting because it involves a logical and organized approach to problem-solving. It allows for a step-by-step analysis of the issue, ensuring that all possible causes are considered and evaluated. This method helps to eliminate guesswork and reduces the chances of missing important details. By following a systematic approach, troubleshooting becomes more efficient and effective, leading to faster and more accurate solutions.Rate this question:
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- 42.
Which troubleshooting step is done by knowing proper equipment operation?
- A.
Analysis
- B.
Recognition
- C.
Repair and check
- D.
Elimination and isolation
Correct Answer
B. RecognitionExplanation
Recognition is the troubleshooting step that is done by knowing proper equipment operation. This step involves identifying the symptoms and patterns of the issue based on the knowledge of how the equipment should function correctly. By recognizing the expected behavior of the equipment, it becomes easier to pinpoint any deviations or abnormalities, which can then guide further troubleshooting actions.Rate this question:
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- 43.
During which troubleshooting step do you try to determine which system could cause the malfunction?
- A.
Analysis
- B.
Verification
- C.
Recognition
- D.
Elimination and isolation
Correct Answer
A. AnalysisExplanation
During the analysis step of troubleshooting, you try to determine which system could cause the malfunction by carefully examining the symptoms and gathering information about the problem. This involves analyzing the behavior of the system, identifying any patterns or trends, and considering all possible factors that could contribute to the malfunction. By conducting a thorough analysis, you can narrow down the potential causes and focus your efforts on resolving the issue effectively.Rate this question:
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- 44.
During which troubleshooting step do you first use the schematic diagram?
- A.
Recognition
- B.
Verification
- C.
Analysis
- D.
Isolation
Correct Answer
C. AnalysisExplanation
The schematic diagram is typically used during the analysis step of troubleshooting. This step involves examining the problem and gathering information to understand the root cause. The schematic diagram provides a visual representation of the system or circuit being analyzed, helping the troubleshooter to identify and understand the various components and their connections. By referring to the schematic diagram, the troubleshooter can determine how the system is supposed to work and compare it to the actual behavior, aiding in the identification of the faulty component or area that needs further investigation.Rate this question:
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- 45.
Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
- A.
Zones
- B.
Schematic
- C.
Wiring diagram
- D.
Reference designation index
Correct Answer
D. Reference designation indexExplanation
A reference designation index is a troubleshooting aid that is designed to aid you if you see an unfamiliar symbol. It provides a list of symbols and their corresponding meanings, allowing you to quickly identify and understand unfamiliar symbols that may be encountered during troubleshooting. This index helps technicians and engineers navigate through complex diagrams and schematics, ensuring that they can accurately interpret the symbols and effectively troubleshoot any issues that may arise.Rate this question:
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- 46.
Which troubleshooting aid is designed to aid you in finding components on a diagram?
- A.
Zones
- B.
Schematic
- C.
Wiring diagram
- D.
Reference designation index
Correct Answer
A. ZonesExplanation
Zones are a troubleshooting aid that is designed to aid you in finding components on a diagram. They divide a diagram into different areas or sections, making it easier to locate specific components or areas of interest. By using zones, you can quickly identify the location of components and navigate through the diagram more efficiently, which can be helpful in troubleshooting and identifying potential issues.Rate this question:
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- 47.
When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
- A.
In series
- B.
To ground
- C.
In parallel
- D.
In series-parallel
Correct Answer
C. In parallelExplanation
When a multimeter is used to measure voltage in a series circuit, it is connected in parallel. This means that the multimeter is connected in a separate branch of the circuit, allowing it to measure the voltage across a specific component without affecting the flow of current in the main circuit. Connecting the multimeter in series would disrupt the circuit and alter the voltage being measured.Rate this question:
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- 48.
To set a value to the height of the oscilloscope grid markings, you adjust the
- A.
Focus
- B.
Pitch control
- C.
Voltage selector
- D.
Time sweep selector
Correct Answer
C. Voltage selectorExplanation
The voltage selector is used to set the value of the height of the oscilloscope grid markings. By adjusting the voltage selector, you can control the vertical scale of the waveform displayed on the oscilloscope screen. This allows you to accurately measure and analyze the voltage levels of the electrical signals being displayed.Rate this question:
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- 49.
To ensusre accuracy of an oscilloscope when preparing for operation you should always,
- A.
Zero the display
- B.
Center the display
- C.
Identify the cal point and adjust to zero
- D.
Identify the cal point and calibrate the display
Correct Answer
D. Identify the cal point and calibrate the displayExplanation
To ensure accuracy of an oscilloscope when preparing for operation, it is important to identify the calibration point and calibrate the display. This involves locating the calibration point on the oscilloscope and using it as a reference to adjust and align the display accurately. By calibrating the display, any potential errors or inaccuracies can be minimized, ensuring that the measurements and readings obtained from the oscilloscope are reliable and precise.Rate this question:
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- 50.
How can you identify an electrostatic sensitive device?
- A.
The package will have special coloring as specified in local directives
- B.
The package will have a special control number as specified in local directives
- C.
It will be marked with the MIL-STD-129 symbol or caution marking
- D.
It will be marked with the MIL-SPC-235 symbol or warning marking
Correct Answer
C. It will be marked with the MIL-STD-129 symbol or caution markingExplanation
Electrostatic sensitive devices are identified by being marked with the MIL-STD-129 symbol or caution marking. This marking indicates that the device is sensitive to electrostatic discharge and needs to be handled with caution to prevent damage. The MIL-STD-129 symbol or caution marking serves as a visual indicator for individuals working with these devices to take appropriate precautions, such as wearing grounding straps, using anti-static packaging, and ensuring proper grounding of workstations and equipment.Rate this question:
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Mar 22, 2023Quiz Edited by
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Dec 30, 2013Quiz Created by
19hmm92
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