Under Ground EHT cables can carry voltage above 11 kV.
Description : Which of the following circuit breakers is preferred for EHT application: - a) Air blast circuit breakers b) Minimum oil circuit breakers c) Bulk oil circuit breakers d) SF6 oil circuit breakers
Last Answer : Air circuit breaker
Description : What is the full form of 'EHT' ? -How To ?
Last Answer : The full form of 'EHT' is Extra High Tension
Description : Three resistors connected in parallel have values of 12 kΩ, 20kΩ, and 30kΩ. What is the equivalent resistance? A37. 6kΩ Q38. Two resistors connected in parallel have values of 10 kΩ and 30kΩ. What is eht equivalent resistance?
Last Answer : 7.5kΩ
Description : the classification of cables. (i) According with voltage levels. (ii) According to numbers of core.
Last Answer : 1. Classification of cables with their voltage levels: 1. Low voltage (tension) cable/LT cable: for operating voltage 1.1 KV. 2. High voltage (tension) cable/HT cable: for operating voltage 11 KV. 3. Super ... 4. Three & half core cable. 5. Four core cable 6. Six core cable 7. Multi core cable
Description : ______ cables carry data signals in the form of light. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Fiber-opti
Description : Fiber-optic cables do not: a. carry current b. cause crosstalk c. generate EMI d. all of the above
Last Answer : d. all of the above
Description : In the illustrated test, if the lamp fails to light on any of the three windings then _________. EL-0027 A. all three windings are grounded and the motor should be sent out for repair B. ... the motor controller and the controller should be checked D. the test should be redone at a higher voltage
Last Answer : Answer: C
Description : Federal Regulations (46 CFR) require the circuit in the illustration to _________. EL-0009 A. be at the vessel's ship's service generator distribution switchboard for normal power, normal lighting ... ground will interfere with the operation of electronic equipment D. All the above are correct
Last Answer : Answer: A
Description : What Is Meant By Insulation Voltage In Cables? Explain It?
Last Answer : It is the property of a cable by virtue of it can withstand the applied voltage without rupturing it is known as insulation level of the cable.
Description : What are the tests to be carried out during DC high voltage test on power cables?
Last Answer : DC high voltage testing. During DC high voltage testing flow of following currents will take place. a. Capacitance charging current. b. Dielectric absorption current. c. Surface leakage current. d. Partial discharge current (corona). e. Volumetric leakage current.
Description : The material generally used for armour of high voltage cables is (a) aluminium (b) steel (c) brass (d) copper
Last Answer : (b) steel
Description : The material commonly used for insulation in high voltage cables is (a) lead (b) paper (c) rubber (d) none of the above
Last Answer : (b) paper
Description : The operating voltage of extra high tension cables is upto (a) 6.6 kV (b) 11 kV (c) 33 kV (d) 66 kV (e) 132 kV
Last Answer : (d) 66 kV
Description : The operating voltage of supertension cables is up to (a) 3.3 kV (b) 6.6 kV (c) 11 kV (d) 33 kV
Last Answer : (d) 33 kV
Description : The operating voltage of high voltage cables is up to (a)l.lkV (b)3.3kV (c)6.6kV (d)llkV
Last Answer : (d)llkV
Description : The advantage of cables over overhead transmission lines is (a) easy maintenance (b) low cost (c) can be used in congested areas (d) can be used in high voltage circuits
Last Answer : (c) can be used in congested areas
Description : In cables the charging current (a) lags the voltage by 90° (b) leads the voltage by 90° (c) lags the voltage by 180° (d) leads the voltage by 180°
Last Answer : (b) leads the voltage by 90°
Description : cables are used for 132 kV lines. (a) High tension (b) Super tension (c) Extra high tension (d) Extra super voltage
Last Answer : (d) Extra super voltage
Description : The thickness of the layer of insulation on the conductor, in cables, depends upon (a) Reactive power (b) Power factor (c) Voltage (d) Current carrying capacity
Last Answer : (c) Voltage
Description : The size of a conductor used in power cables depends on the (A) operating voltage. (B) power factor. (C) current to be carried. (D) type of insulation used.
Last Answer : (C) current to be carried.
Description : I have two arms, but fingers none. I have two feet, but cannot run. I carry well, but I have found I carry best with my feet OFF the ground. What am I? -Riddles
Last Answer : A Wheelbarrow.
Description : A rain sanitary sewer is constructed to carry A. Sanitary sewage B. Storm sewage C. Surface water D. Ground water
Last Answer : ANS: A
Description : State the four methods of laying of cable. State precautions while laying of underground cable in the situation : (i) Minimum clearance between cable and water pipe line when running in parallel. (ii) ... is to be laid in the same trench, what should be minimum spacing between two cables ?
Last Answer : (i) Minimum clearance between cable and water pipe line when running in parallel:- 0.5 mtr. (ii) Minimum clearance between cable and water pipe line when running in parallel:- 0.5 mtr ... should be minimum spacing between two cables :- Then minimum 30 cm spacing is provided between 2 cables
Description : Why is aluminium used instead of copper for overhead cables?
Last Answer : Because copper reacts with atmosphere variation and it's cost High as compared to aluminium and aluminium is good property and less cost so aluminium is used
Description : The diameter of conductor used in LT 660 V grade power cables depends on
Last Answer : The diameter of conductor used in LT 660 V grade power cables depends on current to be carried
Description : The main limitation for power handling capability of short length transmission lines and cables is (A) power factor (B) stability (C) thermal effect limit (D) conductor size
Last Answer : The main limitation for power handling capability of short length transmission lines and cables is thermal effect limit
Description : In M.I. cables, M.I. stands for ______________-. A. Modulation Index B. Multiple Insulation C. Metal Insulation D. Mineral Insulation
Last Answer : In M.I. cables, M.I. stands for Mineral Insulation.
Description : In PVC insulated cables, PVC stands for___________. A. Ploy Voltage Capacitor B. Poly Vinyl Capacitor C. Primary Voltage Capacitor D. Polyvinyl chloride
Last Answer : In PVC insulated cables, PVC stands for Polyvinyl chloride.
Description : Aluminium conductor cables can be joined by (a) Gas welding (b) Soldering (c) Compression (d) Thermit welding
Last Answer : welding
Description : The size of a conductor used in power cables depends on the: (A) operating voltage (C) current to be carried (B) power factor (D) type of insulation used
Last Answer : The size of a conductor used in power cables depends on the: current to be carried
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 : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal
Last Answer : C. ground
Description : ECE Board Exam March 1996 The potential difference between any exposed structured to ground in any electrical installation should not exceed _________ volts RMS. A. 10 B. 45 C. 0 D. 30
Last Answer : B. 45
Description : Solid length for helical compression springs having square and ground ends is given as _________. a. (n + 2)d b. (n + 3)d c. (n + 1)d d. None of the above
Last Answer : a. (n + 2)d
Description : A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect? A. Current B. Voltage C. Nuclear Radiation (Answer) D. power E. None of these
Last Answer : C. Nuclear Radiation (Answer)
Description : The size of the feeder is determined primarily by (A) the current it is required to carry. (B) the percent variation of voltage in the feeder. (C) the voltage across the feeder. (D) the distance of transmission.
Last Answer : Ans: A Size of conductor depends upon amount of current flow.
Description : A disadvantage of using the configuration in the illustrated circuit is _________. EL-0045 A. no current gain B. high input resistance C. high voltage gain D. becomes unstable with an increase of ambient temperature
Description : To remove an alternator operating in parallel with another unit from the main electrical bus, you must FIRST _________. A. adjust the power factor on both units B. set the desired voltage on ... C. open the circuit breaker on the outgoing alternator D. remove the load from the outgoing alternator
Description : If reading AC current with the illustrated device and unsure of the range as a precaution , the first step should be to _________. EL-0047 A. secure power and test for voltage B. disconnect the ... resistance and use Ohm's law to calculate current D. unable to safely measure current with the device
Description : In the illustrated three phase alternator, line voltage is _________. EL-0074 A. 1.73 times the phase voltage B. equal to the phase voltage C. phase voltage divided by 1.73 D. unable to answer this question without knowing the line current
Description : In the illustrated circuit, if the input to leads 'B' and 'Y' was 24 VDC the output between 'A' and 'X' will be _________. EL-0069 A. 24 VDC B. 22.8 VDC, 24 VDC minus the 1.2 VDC voltage drop across two diodes C. undeterminable without knowing the turns ratio of the transformer D. 0 VDC
Description : In the illustration, the component VR2 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to terminal ... 2 at 9.1 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : In the illustration, the component VR1 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : In the illustration, the component VR1 on the A1A1 PCB is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply B. a variable resistor diode to control the output to terminal 9 that controls ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. act as a short circuit for the sensing coil when CEMF is applied B. insure that the voltage across the coil does not exceed 9 volts C. improve response time D. act as a filter to prevent hunting
Description : In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. insure that the voltage across the governor coil (EG-3P) never exceeds .6 VDC B. compensate for the ... heating up C. protect the electronic governor from counter EMF D. act as a filter to prevent hunting
Description : In the illustration, the function generators will accept only a signal of a given polarity, if negative is used for ahead and positive for astern, moving the bridge reference in the direction ... cause a speed change until the output voltage exceeds the value of the lube oil pressure override
Description : The illustrated motor controller _________. EL-0023 A. is a low voltage release controller because the motor will stop when voltage falls below a certain value and automaticly start when normal voltage ... with a generator or transformer bank that is 'wye' wound with T2 connected to the neutral
Last Answer : Answer: B