- In an oil filled transformer, oil is provided for
- A 60 Hz, 4 pole turbo generator rated 100 MVA, 13.8 KV has an inertia constant of 10 MJ/MVA. Find the stored...
- A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum
- A cable has an insulation of relative permittivity 2. If the insulation is replaced by one of relative permittivity
- An 800 kV transmission line has a maximum power transfer capacity of P. If it is operated at 400 kV with the
- An optical fiber cable laid underground has developed a discontinuity at a distance d from the source end.
- A three-phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is
- A 100 MVA, 11 KV, 3-phase, 50 Hz, 8—pole synchronous generator has an inertia constant H equal to
- A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA.
- Define the terms. (i)Factor of safety (ii)working stress
- A 3-phase star-connected 75 MVA, 25 kV 3-phase synchronous generator has a synchronous reactance of...
- A 3-phase, 2 pole, 11 kV, 10000 kVA alternator has earthed neutral through a resistance of 7.0Ω. The machine...
- A single phase transformer rated at 3000 kVA, 69 kV 4.16 kV, 60 Hz has a total internal impedance Zp of 127...
- The vertical deflection of an electron beam on the screen of a CRO is measured to be 8 mm. Now, the
- A 30 MVA, 13.2 KV synchronous generator has a solidly grounded neutral. Its positive, negative and zero ...
- A 30 MVA, 15 KV, 1500 rpm, 3 phase synchronous generator connected to a power grid has a synchronous...
- A cable has inductance of 0.22 mH per kilometer and capacitance of 0.202 µF per kilometer. The surge
- A 500 MW, 3-phase, Y-connected synchronous generator has a rated voltage of 21.5 kV at 0.85 p.f. The line
- A transmission line has 1 P.0 impedance on a base of 11 KV, 100 MVA. On a base of 55 KV. it will have a P.0 impedance of
- A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. ...
- RJ 45 UTP cable has _____cables. A. 2 Pairs B. 3 Pairs C. 4 Pairs D. 5 Pairs
- The flux density in air at a point 40 mm from the centre of a long straight conductor A is 0.03 T. If the return conductor is a considerable distance away, calculate the current.
- What is the resistance of a 160 m wire with a uniform diameter of 0.28 mm, if the specific resistance is
- A wire of 0.14 mm diameter and specific resistance 9.6 micro ohm-cm is 440 cm long. The resistance of the wire will be
- A voltage of 1000 kV is applied to an overhead line with its receiving end...
- A 500 MVA, 11 KV synchronous generator has 0.2 p.u. synchronous reactance. The p.u. synchronous reactance
- A 4000 kVA, 11 kV/132 kV delta-star connected 3-phase transformer has reactance, x1 = 0.12 p.u.
- State two advantages and two drawbacks of liquid filled and gas filled thermometer.
- The average power in a pure inductive circuit is ___________.
- Unit of Current is ___________.
- The purpose of Oil in a distribution Transformer is for...
- A d.c. potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of
- The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper
- A 300 mm long conductor is carrying a current of 10 A and is situated at...
- A two conductor 1 - pi line operates at 50 Hz. The diameter of each conductor is 20 mm...
- A three phase 50 Hz line consists of three conductors each of diameter 21 mm,...
- Describe with neat diagram, how temperature is measured by Gas filled thermometer.
- A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is ...
- A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W....
- An OP amp has a slew rate of 1V/µs. At a signal frequency of 0.1 MHz, the maximum undistorted sine wave ...
- A SCR has an anode supply of sine voltage 200V rms, 50 Hz applied through a 100Q resistor and fired at an...
- A neutral atom with an atomic number of five has electrons equal to:
- An energy meter has a constant of 600 rev/kWh. If the meter makes 10 revolutions in 20 s, ...
- A Transformer rated 250 kVA, 4160 V / 480 V, 60 Hz has an impedance of 5.1%. Calculate the total...
- A Lissajous pattern on an oscilloscope has 5 horizontal tangencies and 2 vertical tangencies. The frequency of...
- A 150 kW electric motor has an efficiency of 92 %, when it operates at full load. Calculate the losses in the...
- In air-core cable the surge voltage travels approximately at the speed of light and a cable of 100m length gives a delay of a. 0.666μsec b. 0.333μsec c. 1.555μsec d. 1μsec
- When 7/0.029 V.I.R cable is carrying 20 A, a drop of 1 V occurs every 12 m. The voltage drop in a 100 m run of...
- A megger is to measure insulation resistance of a cable. The cable should be connected to
- What is the power factor of a cable of loss angle “ө”?