Description : What does the voltage rating of a fuse indicate?
Last Answer : The ability of the fuse to quickly extinguish the arc after the fuse element melts and the maximum voltage that cannot jump across the gap of the fuse after the fuse opens.
Description : What does the current rating of a fuse indicate?
Last Answer : The amount of current the fuse will allow without opening.
Description : In the illustrated motor controller circuit, which statment is true? EL-0023 A. The high and low speed lights operate at less than line voltage with a resistor in series. B. This controller can be ... . The wattage of the high speed light must be greater than the wattage of the low speed light.
Last Answer : Answer: A
Description : In the illustration what is the minimum wattage needed for a 3 ohm resistor with a 12 VDC power source in circuit 'A'? EL-0041 A. 12 watts B. 48 watts C. 64 watts D. 232 watts
Last Answer : Answer: B
Description : The illustrated test is being conducted on the motor shown in the illustration, if the lamp lights dimly then ________. EL-0027 A. the bulb needs to be changed to one with a higher wattage rating B. ... D. a ground or partial ground is indicated, a check with a megger should confirm the lamp test
Last Answer : Answer: D
Description : As shown in the illustration, the circuit has been on the line for several days when component 'E1' burns out. The operator receives an alarm, switches over 'B' to energize the standby ... than required for the circuit therefore limiting the current through the alarm relay which will not pick up
Last Answer : The wattage rating for a ceiling fan motor will be in the range 50 to 150 W .
Description : Why are small-wattage soldering irons not used to solder large conductors?
Last Answer : Although its temperature is as high as the larger irons, it does not have thermal inertia.
Description : what should be the minimum wattage ratings of R 3 and R 5 ?
Last Answer : R3 = 2 watts; R5 = 6 watts.
Description : The third color band on a resistor is used to indicate the ______________. A. tolerance of the resistor B. number of zeros following the first two significant figures in the resistance value C. first significant figure of the resistance D. second significant figure of the resistance
Description : Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or ... under test, both working at the same temperature over the same bandwidth and fed from the same source
Last Answer : C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signals
Description : Indicate the false statement A. The noise generated in a resistance or the resistive component of any impedance is random. B. Random noise power is proportional to the bandwidth over which is measured ... exist D. All formula referring to random noise are applicable only to the value of such noise.
Last Answer : C. A random voltage across the resistor does not exist
Description : Prime importance of star rating is ……………….. to consumer about how the energy efficient each product is. A) Educate. C) Inform B) Indicate. D) Educate and inform.
Last Answer : Educate and inform
Description : What name is given to a resistor used to replace the normal load in a circuit?
Last Answer : Dummy load or dummy antenna.
Description : A resistor is handed to you for identification with the following color code: the first band is blue, followed by gray, green, gold, and brown. What is the resistor’s value?
Last Answer : 6,800,000 ohms (6.8 mega ohms), with 5% tolerance, and a 1% reliability level.
Description : The same resistor mentioned in question 63 has a yellow fifth band. What does this signify?
Last Answer : The resistor’s chance of failure is 0.001 percent for 1000 hours of operation.
Description : A carbon resistor has the following color bands: The first band is yellow, followed by violet, yellow, and silver. What is the ohmic value of the resistor?
Last Answer : 470,000 ohms (470 kilo ohms).
Description : A carbon resistor has a resistance of 50 ohms, and a tolerance of 5 percent. What are the colors of bands one, two, three, and four, respectively?
Last Answer : The bands are green, black, black, and gold.
Description : . Which type of variable resistor should you select for controlling a large amount of current?
Last Answer : The rheostat.
Description : What type resistor should be used to overcome the disadvantages of the carbon resistor?
Last Answer : The wirewound resistor.
Description : A tube has a transconductance of 800 mhos and a load resistor of 50 kohms. When control grid voltage varies by 6 volts, the plate voltage will vary by what amount?
Last Answer : 240 volts.
Description : If the load in question 50 requires a voltage of +90 V, what should be the value of the bleeder resistor?
Last Answer : 2 kΩ
Description : What term identifies a single resistor that represents total resistance of a complex circuit?
Last Answer : Equivalent resistor or Req.
Description : Four equal resistors are connected in parallel, each resistor has an ohmic value of 100 ohms, what is the equivalent resistance?
Last Answer : 25 ohms
Description : A series circuit consists of two resistors in series. R1 = 25 ohms and R2 = 30 ohms. The circuit current is 6 amps. What is the (a) source voltage, (b) voltage dropped by each resistor, (c) total power, and (d) power used by each resistor?
Last Answer : (a) 330 volts. (b) E1 = 150 volts. E2 = 180 volts. (c) 1.98 kilowatts. (d) P1 = 900 watts. P2 = 1.08 kilowatts component but in a parallel circuit total current divides among the available paths.
Description : If the current was increased to 4 amps, what would be the voltage drop across each resistor in the circuit described in question 17?
Last Answer : E1 = 80 volts. E2 = 240 volts. E3 = 320 volts
Description : What is the voltage dropped by each resistor of the circuit described in question 17?
Last Answer : E1 = 60 volts. E2 = 180 volts. E3 = 240 volts.
Description : What is the power used in a circuit that has 10 amperes of current through a 10-ohm resistor?
Last Answer : 1 kilowatt.
Description : What type of resistor should be used in the circuit described in question 12?
Last Answer : A wirewound resistor.
Description : What is the time constant of the resistor and capacitor in a peak detector for pam?
Last Answer : At least 10 times the interpulse period.
Description : A circuit is to be designed in which a capacitor must charge to 40 percent of the maximum charging voltage in 200 microseconds. The resistor to be used has a resistance of 40,000 ohms. What size capacitor must be used?
Last Answer : 0.1 microfarads 40% from the graph = 0.5
Description : What is the RC time constant of a series RC circuit that contains a 12-megohm resistor and a 12-microfarad capacitor?
Last Answer : 144 seconds (t=R x C)
Description : What is the voltage drop across the resistor in an RC charging circuit when the charge on the capacitor is equal to the battery voltage?
Last Answer : Zero.
Description : At what instant does the greatest voltage appear across the resistor in a series RC circuit when the capacitor is charging?
Last Answer : At the instant of the initiation of the action.
Description : What factors determine the value of the multiplier resistor?
Last Answer : The current required for full-scale deflection, and the range of the voltage to be measured.
Description : The floppy disks you are using have a rating of 96 TPI. What does this mean?
Last Answer : The disks can hold 96 tracks per inch.
Description : List the four factors you should use to select wire for a specified current rating.
Last Answer : Conductor size, the material it is made of the location of the wiren in a circuit, and the type of insulation used.
Description : . If the power distribution system shown in figure 2-22 uses selective tripping, what is the time delay rating for each of the circuit breakers shown?
Last Answer : CB1-long time delay; CB2, CB3-short time delay; CB4 through
Description : What is the voltage rating of a switch?
Last Answer : The maximum voltage allowable in the circuit in which the switch is installed.
Description : What is the current rating of a switch?
Last Answer : The maximum current a switch is designed to carry.
Description : What do the dotted lines connecting C1, C2, C5, and C6 indicate?
Last Answer : The dotted lines indicate that these capacitors are "ganged" and are tuned together with a single control.
Description : What does the number "2" (before the letter "N") indicate in the JAN marking scheme?
Last Answer : the number of junctions in the device, which in this case indicates a transistor.
Description : Does 1:5 indicate a step-up or step-down transformer?
Last Answer : Step up.
Last Answer : Step up
Description : In a TDX system with standard synchro connections, the TX rotor is at 120º and the TDX rotor is at 40º. What position will the TR indicate?
Last Answer : . 80º.
Description : In the add mode, what does the output of C2 indicate?
Last Answer : . MSD of the sum.
Description : Does low ripple voltage indicate good or bad filtering?
Last Answer : Good.
Description : What does the letter "N" indicate in the semiconductor identification system?
Last Answer : A semiconductor.
Description : What does each generation of computer systems indicate?
Last Answer : Significant change in computer design.