[ { "ch": "What is the term used to describe the outermost orbital shell of an atom’s electrons?", "ansGr": [ { "ans": [ "Valence shell", "true" ] }, { "ans": [ "Core shell", "false" ] }, { "ans": [ "Electron cloud", "false" ] } ] }, { "ch": "What is the primary material used in the manufacture of semiconductors?", "ansGr": [ { "ans": [ "Silicon", "true" ] }, { "ans": [ "Copper", "false" ] }, { "ans": [ "Aluminum", "false" ] } ] }, { "ch": "What does a diode do?", "ansGr": [ { "ans": [ "It allows current to flow in one direction only", "true" ] }, { "ans": [ "It allows current to flow in both directions", "false" ] }, { "ans": [ "It converts direct current into alternating current", "false" ] } ] }, { "ch": "What does the letter \"N\" represent in the diode identification 1N345A?", "ansGr": [ { "ans": [ "It signifies the material is a semiconductor", "true" ] }, { "ans": [ "It shows the diode's voltage rating", "false" ] }, { "ans": [ "It marks the device as being reverse polarity", "false" ] } ] }, { "ch": "What type of materials are used in a Schottky diode's construction?", "ansGr": [ { "ans": [ "Metal and silicon", "true" ] }, { "ans": [ "Metal and glass", "false" ] }, { "ans": [ "Metal and rubber", "false" ] } ] }, { "ch": "What is a unique feature of Schottky diodes compared to standard PN junction diodes?", "ansGr": [ { "ans": [ "No depletion zone", "true" ] }, { "ans": [ "Higher charge storage capacity", "false" ] }, { "ans": [ "Longer reverse recovery time", "false" ] } ] }, { "ch": "Which instrument is commonly used to test diodes for functionality?", "ansGr": [ { "ans": [ "Ohmmeter", "true" ] }, { "ans": [ "Signal generator", "false" ] }, { "ans": [ "Oscilloscope", "false" ] } ] }, { "ch": "What happens when silicon is doped with an element that has five valence electrons?", "ansGr": [ { "ans": [ "It becomes an N-type semiconductor", "true" ] }, { "ans": [ "It forms an insulator", "false" ] }, { "ans": [ "It becomes a conductor", "false" ] } ] }, { "ch": "What happens when a PN junction is unbiased?", "ansGr": [ { "ans": [ "No external voltage is applied and the depletion zone is in equilibrium", "true" ] }, { "ans": [ "Electrons and holes continuously cross the junction", "false" ] }, { "ans": [ "Current flows freely across the junction", "false" ] } ] }, { "ch": "What happens when a diode is forward biased?", "ansGr": [ { "ans": [ "Current flows as the depletion zone becomes narrower", "true" ] }, { "ans": [ "The depletion zone widens", "false" ] }, { "ans": [ "The diode blocks all current flow", "false" ] } ] }, { "ch": "What happens when a semiconductor diode is forward biased?", "ansGr": [ { "ans": [ "Electrons flow through the diode", "true" ] }, { "ans": [ "The diode blocks current flow", "false" ] }, { "ans": [ "The diode converts DC to AC", "false" ] } ] }, { "ch": "What is the function of the 'Peak Recurrent Forward Current' rating in a diode specification sheet?", "ansGr": [ { "ans": [ "It shows the maximum peak current allowed during recurring pulses in forward bias", "true" ] }, { "ans": [ "It indicates the maximum continuous current the diode can handle in reverse bias", "false" ] }, { "ans": [ "It represents the maximum nonrecurring current flow allowed in forward bias", "false" ] } ] }, { "ch": "How does temperature affect the diode's ratings such as Maximum Average Forward Current?", "ansGr": [ { "ans": [ "Ratings decrease as operating temperature rises above the specified value", "true" ] }, { "ans": [ "Temperature only affects reverse current ratings, not forward current ratings", "false" ] }, { "ans": [ "Ratings remain constant regardless of temperature", "false" ] } ] }, { "ch": "What is the 'Reverse Recovery Time' (TRR) of a diode?", "ansGr": [ { "ans": [ "The maximum time it takes for a diode to transition from forward bias to reverse bias", "true" ] }, { "ans": [ "The time taken for current to stop flowing after applying reverse voltage", "false" ] }, { "ans": [ "The time taken for the depletion zone to re-establish after a forward bias current flow", "false" ] } ] }, { "ch": "Why is the 'Maximum Surge Current' rating important for diode operation?", "ansGr": [ { "ans": [ "It defines the allowable current during short nonrecurring pulses to prevent diode damage", "true" ] }, { "ans": [ "It indicates the maximum current the diode can handle continuously", "false" ] }, { "ans": [ "It sets the limit for current that the diode can handle in reverse bias conditions", "false" ] } ] }, { "ch": "What does the suffix letter \"A\" indicate in the identification 1N345A?", "ansGr": [ { "ans": [ "The diode is an improved version of the basic type", "true" ] }, { "ans": [ "The diode has reverse polarity compared to the original", "false" ] }, { "ans": [ "The diode is a matching pair of separate devices", "false" ] } ] }, { "ch": "In the diode identification system, what does the second set of numbers (e.g., 345 in 1N345) represent?", "ansGr": [ { "ans": [ "It is a serialized identification number", "true" ] }, { "ans": [ "It indicates the number of active elements", "false" ] }, { "ans": [ "It shows the diode's maximum voltage rating", "false" ] } ] }, { "ch": "What happens to a semiconductor diode when it is forward biased?", "ansGr": [ { "ans": [ "Current flow is directly proportional to the applied voltage", "true" ] }, { "ans": [ "The voltage applied does not affect current flow", "false" ] }, { "ans": [ "Current flow is blocked completely", "false" ] } ] }, { "ch": "What is the significance of the avalanche voltage in a reverse-biased diode?", "ansGr": [ { "ans": [ "It is the voltage at which the diode fails to block current flow", "true" ] }, { "ans": [ "It is the point where the diode completely stops current flow", "false" ] }, { "ans": [ "It indicates the maximum current the diode can handle", "false" ] } ] }, { "ch": "What happens to a Zener diode when the Zener voltage is reached?", "ansGr": [ { "ans": [ "Current flows freely in the reverse direction", "true" ] }, { "ans": [ "Current stops flowing in the forward direction", "false" ] }, { "ans": [ "The diode blocks all current flow", "false" ] } ] }, { "ch": "How is a Zener diode different from a standard diode when reverse-biased?", "ansGr": [ { "ans": [ "A Zener diode can regulate voltage, while a standard diode fails at high reverse voltage", "true" ] }, { "ans": [ "A Zener diode operates at lower forward voltage, while a standard diode operates at higher voltages", "false" ] }, { "ans": [ "A Zener diode never experiences reverse bias, while a standard diode always does", "false" ] } ] }, { "ch": "In which type of application are signal diodes commonly used?", "ansGr": [ { "ans": [ "Radio signal processing", "true" ] }, { "ans": [ "Power regulation circuits", "false" ] }, { "ans": [ "High-voltage rectification", "false" ] } ] }, { "ch": "What happens when light strikes a photodiode in a reverse-biased PN junction?", "ansGr": [ { "ans": [ "Electrons and holes are created, allowing current flow", "true" ] }, { "ans": [ "The diode heats up but does not allow current to flow", "false" ] }, { "ans": [ "The diode blocks current flow", "false" ] } ] }, { "ch": "Which factor increases the reverse current in a photodiode?", "ansGr": [ { "ans": [ "Increased temperature or light exposure", "true" ] }, { "ans": [ "Decreased light exposure", "false" ] }, { "ans": [ "Reduced thermal energy", "false" ] } ] }, { "ch": "Which of the following is NOT an advantage of LEDs over incandescent lamps?", "ansGr": [ { "ans": [ "Greater heat production", "true" ] }, { "ans": [ "Lower voltage requirements", "false" ] }, { "ans": [ "Faster on and off operations", "false" ] } ] }, { "ch": "How does a seven-segment LED display form the number \"9\"?", "ansGr": [ { "ans": [ "By lighting all LED segments except \"E\"", "true" ] }, { "ans": [ "By lighting all LED segments except \"B\"", "false" ] }, { "ans": [ "By lighting all LED segments except \"G\"", "false" ] } ] }, { "ch": "What is a common feature of larger rectifier diodes?", "ansGr": [ { "ans": [ "They are encased in metal", "true" ] }, { "ans": [ "They have lower voltage ratings", "false" ] }, { "ans": [ "They are smaller in size", "false" ] } ] }, { "ch": "Why is a Schottky diode considered a unipolar device?", "ansGr": [ { "ans": [ "Free electrons are the majority carrier", "true" ] }, { "ans": [ "It conducts current in both directions", "false" ] }, { "ans": [ "It has equal numbers of holes and electrons", "false" ] } ] }, { "ch": "What is the typical reverse recovery time for a Schottky diode?", "ansGr": [ { "ans": [ "Shorter than standard diodes", "true" ] }, { "ans": [ "Equal to silicon diodes", "false" ] }, { "ans": [ "Non-measurable and instant", "false" ] } ] }, { "ch": "What happens to the resistance of a varistor as voltage increases?", "ansGr": [ { "ans": [ "Resistance decreases with high voltage", "true" ] }, { "ans": [ "Resistance increases with high voltage", "false" ] }, { "ans": [ "Resistance remains constant", "false" ] } ] }, { "ch": "How does a varistor respond to small or moderate voltage applications?", "ansGr": [ { "ans": [ "It allows minimal current flow", "true" ] }, { "ans": [ "It allows significant current flow", "false" ] }, { "ans": [ "It blocks all current flow", "false" ] } ] }, { "ch": "How does the capacitance of a varactor diode change with increased reverse bias voltage?", "ansGr": [ { "ans": [ "Capacitance decreases inversely", "true" ] }, { "ans": [ "Capacitance remains constant", "false" ] }, { "ans": [ "Capacitance fluctuates randomly", "false" ] } ] }, { "ch": "What is a common application of varactor diodes in electronics?", "ansGr": [ { "ans": [ "Variable tuning circuits", "true" ] }, { "ans": [ "Signal amplification circuits", "false" ] }, { "ans": [ "Power supply circuits", "false" ] } ] }, { "ch": "What should you do before testing a diode with an ohmmeter?", "ansGr": [ { "ans": [ "Disconnect the diode from the circuit", "true" ] }, { "ans": [ "Check the diode for physical damage", "false" ] }, { "ans": [ "Remove the diode from its housing", "false" ] } ] }, { "ch": "How can you determine if a diode is functioning properly using resistance measurements?", "ansGr": [ { "ans": [ "A high reverse and low forward resistance", "true" ] }, { "ans": [ "A low reverse and high forward resistance", "false" ] }, { "ans": [ "Both measurements should be low", "false" ] } ] }, { "ch": "How does a diode in a series circuit with AC voltage behave?", "ansGr": [ { "ans": [ "It converts AC to DC, using only half the wave", "true" ] }, { "ans": [ "It amplifies the AC voltage across the load", "false" ] }, { "ans": [ "It allows full AC current to flow through", "false" ] } ] }, { "ch": "What is the main advantage of a bridge rectifier compared to a simple diode in series?", "ansGr": [ { "ans": [ "It uses the full wave of AC, increasing efficiency", "true" ] }, { "ans": [ "It allows higher voltage drops across diodes", "false" ] }, { "ans": [ "It reduces the output current for the load", "false" ] } ] }, { "ch": "How many terminals does a transistor have?", "ansGr": [ { "ans": [ "3", "true" ] }, { "ans": [ "4", "false" ] }, { "ans": [ "2", "false" ] } ] }, { "ch": "What semiconductor materials are used to make a transistor?", "ansGr": [ { "ans": [ "P-type and N-type semiconductor materials", "true" ] }, { "ans": [ "Conductive and insulating materials", "false" ] }, { "ans": [ "N-type semiconductor between two layers of metal", "false" ] } ] }, { "ch": "What is the primary function of a TRIAC in AC circuits?", "ansGr": [ { "ans": [ "To allow current flow in both directions", "true" ] }, { "ans": [ "To allow current flow in only one direction", "false" ] }, { "ans": [ "To act as a resistor", "false" ] } ] }, { "ch": "What is the primary function of a NOT gate?", "ansGr": [ { "ans": [ "To invert the input signal.", "true" ] }, { "ans": [ "To combine multiple input signals.", "false" ] }, { "ans": [ "To isolate different circuit components.", "false" ] } ] }, { "ch": "What additional terminal is added to a Shockley diode to create a Silicon Controlled Rectifier (SCR)?", "ansGr": [ { "ans": [ "Gate", "true" ] }, { "ans": [ "Anode", "false" ] }, { "ans": [ "Emitter", "false" ] } ] }, { "ch": "What are the two major kinds of logic circuits mentioned?", "ansGr": [ { "ans": [ "TTL and CMOS", "true" ] }, { "ans": [ "TTL and LCD", "false" ] }, { "ans": [ "TTL and LED", "false" ] } ] }, { "ch": "What is the significance of the breakover voltage in a Shockley diode?", "ansGr": [ { "ans": [ "It is the voltage that allows current to flow through the diode", "true" ] }, { "ans": [ "It is the voltage required to charge the base of the transistor.", "false" ] }, { "ans": [ "It is the voltage that prevents current from flowing.", "false" ] } ] }, { "ch": "What happens to an SCR when a voltage is applied to the gate terminal?", "ansGr": [ { "ans": [ "The SCR becomes latched, allowing current to flow.", "true" ] }, { "ans": [ "The SCR short-circuits the circuit.", "false" ] }, { "ans": [ "The SCR is turned off.", "false" ] } ] }, { "ch": "How does the gate pulse polarity affect a TRIAC's operation?", "ansGr": [ { "ans": [ "It determines the direction of current flow through the TRIAC.", "true" ] }, { "ans": [ "It determines the voltage level applied to the load", "false" ] }, { "ans": [ "It determines the amount of current flowing through the TRIAC.", "false" ] } ] }, { "ch": "What happens when the applied emitter voltage of a UJT exceeds the voltage at the gradient point?", "ansGr": [ { "ans": [ "The UJT becomes forward biased, allowing current to flow from the B1 electrode to the emitter.", "true" ] }, { "ans": [ "The UJT becomes reverse biased, preventing current flow", "false" ] }, { "ans": [ "The UJT outputs a constant voltage regardless of the input.", "false" ] } ] }, { "ch": "What effect does the gate voltage have on a Field Effect Transistor (FET)?", "ansGr": [ { "ans": [ "The gate voltage narrows or widens the depletion area.", "true" ] }, { "ans": [ "The gate voltage can reverse the current direction instantly.", "false" ] }, { "ans": [ "The gate voltage directly controls the input current flow.", "false" ] } ] }, { "ch": "What distinguishes a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) from a standard FET?", "ansGr": [ { "ans": [ "MOSFETs use a metal gate with an insulating layer.", "true" ] }, { "ans": [ "MOSFETs do not use a gate to control current flow.", "false" ] }, { "ans": [ "MOSFETs have two types of semiconductor materials.", "false" ] } ] }, { "ch": "How do depletion mode MOSFETs operate when voltage is applied to the gate?", "ansGr": [ { "ans": [ "They restrict or close an open channel for current flow.", "true" ] }, { "ans": [ "They maintain current flow at zero bias conditions.", "false" ] }, { "ans": [ "They create an open channel when voltage is applied.", "false" ] } ] }, { "ch": "In the context of a NOT gate, what would be the output if the input is Logic 0?", "ansGr": [ { "ans": [ "The output will be Logic 1.", "true" ] }, { "ans": [ "The output will remain at Logic 0.", "false" ] }, { "ans": [ "The output will remain undefined.", "false" ] } ] }, { "ch": "Which statement best describes the output of an AND gate when it receives both inputs as Logic 0?", "ansGr": [ { "ans": [ "The output will be Logic 0.", "true" ] }, { "ans": [ "The output will become undefined.", "false" ] }, { "ans": [ "The output will be Logic 1.", "false" ] } ] }, { "ch": "What is the main difference between an OR gate and an EXCLUSIVE OR gate?", "ansGr": [ { "ans": [ "An OR gate outputs Logic 1 when both inputs are Logic 1.", "true" ] }, { "ans": [ "Both gates have the same output.", "false" ] }, { "ans": [ "An EXCLUSIVE OR gate has three inputs.", "false" ] } ] }, { "ch": "What will be the output of an EXCLUSIVE OR gate if both inputs are Logic 1?", "ansGr": [ { "ans": [ "The output will be Logic 0.", "true" ] }, { "ans": [ "The output will be Logic 1.", "false" ] }, { "ans": [ "The output will be undefined.", "false" ] } ] }, { "ch": "What is a key advantage of CMOS logic circuits compared to TTL logic circuits?", "ansGr": [ { "ans": [ "CMOS circuits operate over a wider range of voltages.", "true" ] }, { "ans": [ "CMOS circuits require more components.", "false" ] }, { "ans": [ "CMOS circuits are slower in operation.", "false" ] } ] }, { "ch": "What is a key characteristic of a linear circuit?", "ansGr": [ { "ans": [ "Its output is proportional to the input, resulting in a straight-line graph.", "true" ] }, { "ans": [ "It always uses transistors and diodes as its primary components.", "false" ] }, { "ans": [ "Its output is unrelated to the input, producing non-linear results.", "false" ] } ] }, { "ch": "What are integrated circuits (ICs) constructed on?", "ansGr": [ { "ans": [ "Silicon semiconductor wafers", "true" ] }, { "ans": [ "Plastic sheets", "false" ] }, { "ans": [ "Metal plates", "false" ] } ] }, { "ch": "What is a defining feature of an operational amplifier in electronic circuits?", "ansGr": [ { "ans": [ "It amplifies the voltage difference between its inputs by hundreds of thousands of times.", "true" ] }, { "ans": [ "It is a high-gain amplifier with output proportional to the sum of its inputs.", "false" ] }, { "ans": [ "It is an integrated circuit with low-gain used for signal reduction in circuits.", "false" ] } ] }, { "ch": "Which of the following is a feature of the Dual In-Line Package (DIP) standard?", "ansGr": [ { "ans": [ "It standardizes the dimensions and usage of connecting terminals.", "true" ] }, { "ans": [ "It restricts the types of circuits that can be housed within a DIP element.", "false" ] }, { "ans": [ "It allows the use of only one row of terminals for connections.", "false" ] } ] }, { "ch": "What is the advantage of using multiple chips in microprocessor architecture?", "ansGr": [ { "ans": [ "It enables higher bit processing and faster speeds.", "true" ] }, { "ans": [ "It decreases the number of transistors used.", "false" ] }, { "ans": [ "It allows for slower processing speeds.", "false" ] } ] }, { "ch": "What is a key function of a Zener diode in an electrical circuit?", "ansGr": [ { "ans": [ "To regulate voltage by allowing reverse current flow at a specific voltage", "true" ] }, { "ans": [ "To increase current flow under forward bias", "false" ] }, { "ans": [ "To convert AC to DC power and amplify signals", "false" ] } ] }, { "ch": "What is a common use of a signal diode?", "ansGr": [ { "ans": [ "Processing radio signals with small currents", "true" ] }, { "ans": [ "Regulating large voltage", "false" ] }, { "ans": [ "Processing radio signals with high currents", "false" ] } ] }, { "ch": "How does light enable current to flow in a photodiode?", "ansGr": [ { "ans": [ "It excites electrons in the depletion region, generating electron-hole pairs that allow current to flow", "true" ] }, { "ans": [ "It lowers the resistance of the entire diode by increasing atomic vibration", "false" ] }, { "ans": [ "It short-circuits the PN junction, allowing current to bypass resistance", "false" ] } ] }, { "ch": "What happens when light strikes the depletion layer of a reverse-biased photodiode?", "ansGr": [ { "ans": [ "Electron-hole pairs are generated, increasing the reverse current", "true" ] }, { "ans": [ "The photodiode becomes forward-biased and stops current flow", "false" ] }, { "ans": [ "Light energy neutralizes the depletion zone, making it act as an insulator", "false" ] } ] }, { "ch": "What is LED stand for?", "ansGr": [ { "ans": [ "light-emitting diode", "true" ] }, { "ans": [ "light-enable diode", "false" ] }, { "ans": [ "Low-energy diode", "false" ] } ] }, { "ch": "What is the main application of a rectifier diode?", "ansGr": [ { "ans": [ "is usually used in applications that require high current", "true" ] }, { "ans": [ "is usually used in applications that require low current", "false" ] }, { "ans": [ "is usually used in applications that require high frequecy", "false" ] } ] }, { "ch": "Which is the correct statement", "ansGr": [ { "ans": [ "The Schottky diode has no depletion zone or charge storage", "true" ] }, { "ans": [ "The varistor has high resistance at high voltage and low resistance at high voltage", "false" ] }, { "ans": [ "The varactor capacitance is independent on the applied voltage", "false" ] } ] }, { "ch": "Printed circuit boards (PCB) are primarily used in which of the following devices?", "ansGr": [ { "ans": [ "Personal computers, avionics, and navigation equipment.", "true" ] }, { "ans": [ "Household appliances, automobiles, and primitive machines", "false" ] }, { "ans": [ "Light bulbs, wires, and power generators.", "false" ] } ] }, { "ch": "What is a typical thickness of a printed circuit board (PCB)?", "ansGr": [ { "ans": [ "1/16 inch (1.5 mm).", "true" ] }, { "ans": [ "1/4 inch (5 mm).", "false" ] }, { "ans": [ "1/8 inch (3 mm).", "false" ] } ] }, { "ch": "What materials are commonly used to construct printed circuit boards (PCBs)?", "ansGr": [ { "ans": [ "Resin impregnated paper and fiber glass cloth.", "true" ] }, { "ans": [ "Metal sheets and rubber compounds.", "false" ] }, { "ans": [ "Copper foil and aluminum sheets.", "false" ] } ] }, { "ch": "In modern printed circuit boards, components are typically mounted how?", "ansGr": [ { "ans": [ "Surface mounted on the same side as the copper traces.", "true" ] }, { "ans": [ "Mounted on a separate board from the copper traces.", "false" ] }, { "ans": [ "Surface mounted opposite to the copper traces.", "false" ] } ] }, { "ch": "What is the primary purpose of a via in multi-layer printed circuit boards?", "ansGr": [ { "ans": [ "To connect multiple layers electrically.", "true" ] }, { "ans": [ "To provide ventilation for the components.", "false" ] }, { "ans": [ "To increase the strength of the board.", "false" ] } ] }, { "ch": "Why are printed circuit boards often coated with a protective substance?", "ansGr": [ { "ans": [ "To protect the board from environmental damage.", "true" ] }, { "ans": [ "To enhance the electrical conductivity", "false" ] }, { "ans": [ "To reduce the weight of the board and to make the board non-conductive.", "false" ] } ] }, { "ch": "An open loop system lacks", "ansGr": [ { "ans": [ "Feedback", "true" ] }, { "ans": [ "Power", "false" ] }, { "ans": [ "Input signal", "false" ] } ] }, { "ch": "A closed loop system provides feedback to the:", "ansGr": [ { "ans": [ "Controller", "true" ] }, { "ans": [ "Motor", "false" ] }, { "ans": [ "Transducer", "false" ] } ] }, { "ch": "A synchro system is primarily used for:", "ansGr": [ { "ans": [ "Transmitting position information", "true" ] }, { "ans": [ "Indicating engine performance", "false" ] }, { "ans": [ "Transmitting fuel information", "false" ] } ] }, { "ch": "DC selsyn systems are used in aircraft with:", "ansGr": [ { "ans": [ "Direct current (DC) systems", "true" ] }, { "ans": [ "Alternating current (AC) systems", "false" ] }, { "ans": [ "Pneumatic systems", "false" ] } ] }, { "ch": "In a capacitance transmitter, the amount of fuel is determined by:", "ansGr": [ { "ans": [ "The dielectric constant of the material between the plates", "true" ] }, { "ans": [ "The distance between the plates", "false" ] }, { "ans": [ "The length of capacitance transmitter", "false" ] } ] }, { "ch": "Inductance transmitters are primarily used to measure:", "ansGr": [ { "ans": [ "Acceleration and air data", "true" ] }, { "ans": [ "Quantity and temperature of fuel", "false" ] }, { "ans": [ "Position changes", "false" ] } ] }, { "ch": "What is a servomechanism in an aircraft system?", "ansGr": [ { "ans": [ "Is an electric control system for an automatic powered mechanism that produces motion using a low energy input signal", "true" ] }, { "ans": [ "Is a mechanism control system for an automatic powered mechanism that produces force using a low energy input signal", "false" ] }, { "ans": [ "Is a mechanism control system for an automatic powered mechanism that produces force using a high energy input signal", "false" ] } ] }, { "ch": "What is a synchro system used for in an aircraft?", "ansGr": [ { "ans": [ "Transmitting information from one point to another", "true" ] }, { "ans": [ "Converting alternating current to direct current", "false" ] }, { "ans": [ "Regulating the mechanismmotor speed", "false" ] } ] }, { "ch": "What factors does the capacitance of a capacitor depend on?", "ansGr": [ { "ans": [ "Area of the plates", "true" ] }, { "ans": [ "Voltage supply", "false" ] }, { "ans": [ "Type of material used", "false" ] } ] }, { "ch": "Which components make up a basic DC selsyn system?", "ansGr": [ { "ans": [ "Transmitter, indicator, and connecting wires", "true" ] }, { "ans": [ "Motor, capacitor, and transmitter", "false" ] }, { "ans": [ "Transmitter, receiver, and battery", "false" ] } ] }, { "ch": "Which components make up a transmitter of the DC selsyn system?", "ansGr": [ { "ans": [ "A circular resistance winding and a rotatable contact arm", "true" ] }, { "ans": [ "A circular resistance winding and a motor", "false" ] }, { "ans": [ "A circular resistance winding and a battery", "false" ] } ] }, { "ch": "What happens to the rotatable contact arm in a variable resistor used in a DC selsyn system?", "ansGr": [ { "ans": [ "It turns on a shaft in the center of the resistance winding to vary the output signal", "true" ] }, { "ans": [ "It rotates independently from the shaft to create mechanical feedback", "false" ] }, { "ans": [ "It turns on a shaft in the center of the resistance winding to generate voltage pulses", "false" ] } ] }, { "ch": "Where are the brushes attached in a DC selsyn transmitter?", "ansGr": [ { "ans": [ "The brushes are attached to the two ends of the rotatable contact arm", "true" ] }, { "ans": [ "The brushes are attached to the two ends of the resistance winding", "false" ] }, { "ans": [ "The brushes are attached to the two ends of the permanent magnet", "false" ] } ] }, { "ch": "How is the transmitter in a DC selsyn system typically connected to the moving part of the aircraft?", "ansGr": [ { "ans": [ "Using a mechanical linkage", "true" ] }, { "ans": [ "By electrical relays", "false" ] }, { "ans": [ "With a magnetic coupling", "false" ] } ] }, { "ch": "When the DC selsyn system is used to indicate landing gear position, what additional information can it provide?", "ansGr": [ { "ans": [ "Engagement status of the up-lock or down-lock mechanism", "true" ] }, { "ans": [ "Hydraulic pressure of the gear system", "false" ] }, { "ans": [ "Engagement status of down-lock mechanism and air-ground signal", "false" ] } ] } ]