Description : Without any additional circuitry, an 8:1 MUX can be used to obtain: (1) Some but not all Boolean functions of 3 variables (2) All function of 3 variables but none of 4 variables (3) All functions of 3 variables and some but not all of 4 variables (4) All functions of 4 variables
Last Answer : A
Description : In electronic circuits, DC voltages can be positive (+) or negative (-) when measured with respect to the _________. A. printed circuit board 'common' trace B. chassis, console frame or hull 'ground' C. analogue or digital circuitry 'common' bus D. all of the above
Last Answer : Answer: D
Description : Strong interference from one particular station can be eliminated by the use of A. noise limiters B. squelch circuits C. negative feedback D. wave traps in the antenna circuitry
Last Answer : D. wave traps in the antenna circuitry
Description : Which of the following was used as circuitry for first generation of computers? (1) Vacuum tube (2) Transistors (3) Integrated circuits (4) Microprocessors
Last Answer : Vacuum tube
Description : Error-rate damping is effective because the circuitry has the capability of ______________the amount of overshoot before it happens.
Last Answer : Anticipating
Description : Is the drive circuitry generally more complex for an LED or a laser diode? Why?
Last Answer : For a laser diode. The laser diode transmitter generally contains output power control circuitry and may contain a TE cooler and some circuitry associated with the TE cooler.
Description : Name the components which greatly increase the weight of vacuum-tube circuitry.
Last Answer : Transformers, capacitors, and resistors.
Description : What part of a floppy disk drive transport contains the circuitry which controls the electromechanical parts of the transport?
Last Answer : Drive electronics circuit board.
Description : When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to _____________. A. increase, causing a drop in the line current B ... an increase in the line voltage D. decrease, causing an increase in the line current
Description : Which of the following statements is correct for the use of packet switching? A. the subdivision of information into individuallyaddressed packets in conjunction with alternativerouting arrangementenabled the transmission path ... capacity could be achieved. D. All of theabove E. None of the above
Last Answer : All of theabove
Description : The power requirements for operating the circuits shown in the illustration are ____________. EL-0099 A. (+) and (-) 50 volts D.C. B. (+) 28 and (+) 50 volts D.C. C. (+) 28 volts D.C. and 115 volts A.C. D. (+) 28 volts and (-) 50 volts D.C.
Last Answer : Answer: A
Description : Electrostatic forces in high voltage circuits cause indicating instruments to give ____________. A. parallax readings B. highly intuitive readings C. highly accurate readings D. inaccurate readings
Description : Operational amplifiers, used primarily in analog circuits, are characterized by ____________. A. high input impedance, high gain and low output impedance B. high input impedance, high gain and high output ... gain and high output impedance D. low input impedance, high gain and low output impedance
Description : When reading electrical motor controller diagrams, it helps to know that ____________. A. current paths in the control circuit are drawn as heavy lines and in the power circuit as lighter lines B. current ... subject to 500 volts or greater are drawn as light lines and below 500 volts as heavy lines
Last Answer : Answer: B
Description : A molded-case breaker provides protection against short circuits by using a/an ____________. A. shading coil B. arc quencher C. electromagnet D. holding coil
Last Answer : Answer: C
Description : The purpose of a short circuit forcing module (short time trip) installed in a branch line is to provide ____________. A. high speed clearance of low impedance short circuits in the branch B. ... C. isolation of short circuits by selective tripping of branch circuit breakers D. all of the above
Description : Name a common application of counting circuits.
Last Answer : Frequency counters or frequency dividers.
Description : How many tuned parallel LC circuits are shown in this schematic?
Last Answer : Four.
Description : What is the major factor that limits the high-frequency response of an amplifier circuits?
Last Answer : The capacitance of the circuit.
Description : List the circuits that all oscilloscopes have in common.
Last Answer : A CRT, a group of control circuits, power supply, sweep circuitry, and deflection circuitry.
Description : Circuits which maintain constant voltage or current outputs are called dc voltage or dc current ___.
Last Answer : Regulators.
Description : Why is the use of large value capacitors in filter circuits discouraged?
Last Answer : Expense
Description : Which of the basic timing circuits produces sharp trigger pulses directly?
Last Answer : Blocking oscillators.
Description : What basic circuits meet the requirements of an externally synchronized master oscillator?
Last Answer : Sine-wave oscillator, single-swing blocking oscillator, and master trigger (astable) multivibrator.
Description : The actions of the tr and atr circuits depend on the impedance characteristics of what length of transmission line?
Last Answer : Quarter-wavelength section
Description : What is the purpose of the majority of circuits in a radar system?
Last Answer : Timing and control.
Description : What do the smaller circuits in third generation computers allow for?
Last Answer : Faster internal processing speeds.
Description : What is the primary advantage of hybrid circuits?
Last Answer : Circuit flexibility
Description : When designing vacuum-tube circuits, what characteristics of tubes must be taken into consideration?
Last Answer : Differences in performance of tubes of the same type
Description : Name the two series circuits that exist in a diode circuit.
Last Answer : Filament and plate.
Description : When are two circuits said to be coupled?
Last Answer : When they are arranged so that energy from one circuit is transferred to the other circuit
Description : Boolean algebra is used primarily by _______ to simplify circuits.
Last Answer : Design engineers.
Description : With regard to computer logic circuits, what is meant by "complement?"
Last Answer : The opposite of the original statement.
Description : The total power in both series and parallel circuits is computed with the formula: PT = P1 + P2 + P3 +...Pn. Why can this formula be used for both series and parallel circuits?
Last Answer : In both cases all the power used in the circuit must come from the source.
Description : How are circuits protections devices connected to the circuit they are intended to protect and why are they connected in this way?
Last Answer : In series, so total current will be stopped when the device opens.
Description : What area of an ohmmeter scale should be used when measuring circuits?
Last Answer : The middle of the scale.
Description : In addition to stepping up or stepping down the input line voltage, what additional purpose does the transformer serve?
Last Answer : . It isolates the chassis from the power line.
Description : What type of magnetic tape is used to record computer programs and data, and what are the additional thickness and quality standards for this type of tape?
Last Answer : digital magnetic tape is for computer programs and data. Its base material is about 50% thicker. The tape’s surface must not have blemishes or coating flaws because losing even one digital data bit could ruin the recorded computer program or data.
Description : Cartridge hard disk drives with 14" disk packs may require what additional types of preventive maintenance?
Last Answer : a. Cleaning with a special cleaning disk. b. Cleaning air filters. c. Cleaning spindles, rails, and slides. d. Cleaning and buffing read/write heads.
Description : What type of desktop computer does not contain a tower and instead uses the same case to house the display and the processing circuitry?
Last Answer : And All-in-one.
Description : The earth-wire of a cable is connected to – (1) the outer metallic body of the appliance (2) the fuse of the appliance (3) the filament of the appliance (4) short circuitry of the appliance
Last Answer : (2) the fuse of the appliance Explanation: Earth wire prevents Electric shocks. It is connected to the electrical cable of an appliance to prevent electric shocks. Actually it has very low resistance and allows current to pass through it easily.
Description : First Generation computers used ______ for Circuitry and ________ for memory (A) Transistor and Magnetic Core (B) IC and Magnetic Memory (C) Vacuum tubes and Magnetic drum (D) IC and Magnetic Core
Last Answer : (C) Vacuum tubes and Magnetic drum
Description : If the supply voltage is 220 volts 60 Hz, what is the operating voltage of the motor controller circuitry illustrated? EL-0011 A. 110 volts DC B. 110 volts AC C. 220 volts DC D. 220 volts AC
Description : The symbol at coordinates '15R' in the illustration indicate a connection to ___________. EL-0100 A. the analog circuitry common bus B. ground C. the vessel's hull D. the console's chassis
Description : The symbol at coordinates '11R' in the illustration indicate a connection to _____________. EL-0100 A. ground B. the console chassis C. the digital circuitry common bus D. earth through the vessel's hull
Description : In electronic circuitry, the abbreviation 'PCB' commonly means ______________. A. pulse coded binary B. printed circuit board C. poly-coated braid D. personal computer bits
Description : As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to _____________. A. draw a one line diagram of the circuitry B. test all fuses and measure the line voltage C. take megger readings D. insulate the apparatus from ground