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What is resonance in a Sonometer?

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What is vertical sag?

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2 answers 51 views

What is sag in power system?

asked Mar 10, 2018 in Advanced electrical power system by Quiz
1 answer 27 views

The sag of a transmission line is least affected by (A) Self weight of the conductor. (B) Temperature of the surrounding air. (C) Current through the conductor. (D) Ice deposited on the conductor.

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 185 views

For a 66 kV line having span of 200 meters between towers the approximate sag will be 2 m. If the span is double the sag will be:  (A) 1 m (B) 2 m (C) 4m (D) 8m

asked May 8, 2018 in Electric Power Distribution by Shimroz123
1 answer 29 views

The vertical deflection of an electron beam on the screen of a CRO is measured to be 8 mm. Now, the potential difference between the Y-plates is doubled, and simultaneously the pre-accelerating anode voltage is reduced to half of its previous value. Then, the vertical deflection of the beam on the screen would become (A) 64 mm (B) 32 mm (C) 8 mm (D) 1 mm

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
1 answer 18 views

lf the wire which is vertical to this page has electron flow downwards the conductor will have

asked Apr 26, 2018 in Electrical Engineering by Shimroz123
1 answer 27 views

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?

asked Mar 22, 2018 in Engineering Mechanics by Shimroz123
1 answer 28 views

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?

asked Mar 22, 2018 in Engineering Mechanics by Shimroz123
1 answer 21 views

A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if?

asked Mar 22, 2018 in Engineering Mechanics by Shimroz123
1 answer 21 views

What is the sag for a span of 400m, if the ultimate tensile strength of conductor is 6000 kgf, and the weight of conductor is 550 kgf/km? Factor of safety is 2.

asked Mar 27, 2018 in Power system by Shimroz123
0 answers 21 views

What is locomotive force?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 32 views

What is the main purpose of electroplating?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 15 views

What is a conveyor motor?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 68 views

What is the traction system?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 9 views

What is undercut defect in welding?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 29 views

What is the difference between an insulator and a dielectric?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 11 views

What is meant by resistance heating?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 26 views

What is meant by dielectric heating?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 338 views

Explain with neat diagram construction and working of Ajax Wyatt vertical core induction furnace.

asked Oct 13, 2018 in Industry Electrical Systems-II by Shimroz123
1 answer 31 views

Horizontal axis and vertical axis are the types of   (a) Nuclear Reactor (b) Wind Mills (c) Bio Gas Reactor (d) Solar Cell 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
0 answers 59 views

A Lissajous pattern on an oscilloscope has 5 horizontal tangencies and 2 vertical tangencies. The frequency of the horizontal input is 1000 Hz. What is the frequency of the vertical input?  (A) 400 Hz (B) 5000 Hz (C) 4000 Hz (D) 2500 Hz

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 332 views

What are the applications of electroplating?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 21 views

What are the industrial application of electrolysis?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 19 views

What are the different types of welding?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 24 views

What are the four basic welding positions?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 13 views

 lumen / watt is the unit of: A) light flux B) luminous intensity C) brightness D) luminous efficiency

asked Jun 4, 2018 in Utilization of electrical energy by Shimroz123
1 answer 13 views

 Which braking system on the locomotives is the costliest among the following? A) Vacuum braking on diesel locomotives B) Vacuum braking on steam locomotives C) Regenerative braking on electric locomotives D) All braking systems are equally costly

asked Jun 4, 2018 in Utilization of electrical energy by Shimroz123
1 answer 25 views

In practice generative breaking is used when (a) quick motor reversal is desired. (b) load has overhauling characteristic (c) controlling elevators, rolling mills etc. (d) none of these 

asked May 25, 2018 in Utilization of electrical energy by Shimroz123
1 answer 126 views

Power-factor of industrial arc and induction furnace is:

asked May 22, 2018 in Utilization of electrical energy by Shimroz123
1 answer 15 views

For induction heating, which of the following is abnormally high?  A)Voltage B) Current C) Frequency D) Phase angle

asked May 20, 2018 in Utilization of electrical energy by Shimroz123
1 answer 10 views

Dielectric heating is used for heating  A) Wood B)Aluminium C) Magnetic steel D) Copper

asked May 20, 2018 in Utilization of electrical energy by Shimroz123
1 answer 13 views

Water break test is used to

asked May 15, 2018 in Utilization of electrical energy by Shimroz123
1 answer 4 views

Gray iron is usually welded by   (a) Gas welding (b) TIG welding (c) MIG welding (d) Arc welding 

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 8 views

In an electric press, mica is used   (a) As an insulator (b) As a device for power factor improvement (c) For dielectric heating (d) For induction heating 

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 8 views

 The flicker effect of fluorescent lamps is more pronounced at   (a) Lower frequencies (b) Higher frequencies (c) Lower voltage (d) Higher voltages  

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 30 views

Which of the following lamp light output is comparable with that of day light?  (a) Fluorescent lamp (b) Sodium vapour lamp (c) Mercury vapour lamp (d) Halogen lamp 

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 11 views

The coefficient of adhesion is  (a) Zero in traction systems (b) Low in case of AC traction high in DC traction (c) High in AC traction low in case of DC traction (d) Same on AC and DC traction systems

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 21 views

The average speed of a train is independent of   (a) Duration of steps (b) Acceleration and braking retardation (c) Distance between stops (d) Running time

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 17 views

In which of the following welding methods, the molten metal is poured for joining the metals ?   (a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding 

asked May 13, 2018 in Utilization of electrical energy by Shimroz123
1 answer 18 views

Power in the wind is proportional to

asked May 1, 2018 in Utilization of electrical energy by Shimroz123
1 answer 945 views

The motor used for electric traction is  (1) D.C. shunt motor (3) D.C. series motor  (2) D.C. compound motor (4) Synchronous motor

asked May 1, 2018 in Utilization of electrical energy by Shimroz123
1 answer 27 views

For arc welding current range is usually  (1) 10 to 15 A (2) 30 to 40 A (3) 50 to 100 A (4) 100 to 350 A

asked Apr 30, 2018 in Utilization of electrical energy by Shimroz123
1 answer 24 views

Spot welding is used for (1) Thin metal (3) Castings only (2) Rough and irregular surface (4) Thick sections

asked Apr 30, 2018 in Utilization of electrical energy by Shimroz123
1 answer 14 views

The arc voltage in a circuit breaker is :

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 10 views

The supply for arc welding is : 

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 14 views

Which of the following is a cold cathode lamp ?  (A) Mercury vapour lamp (C) Incandescent lamp (B) Sodium vapour lamp (D) Neon lamp

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 15 views

The range of frequencies used in induction heating is :  (A) 0-25 Hz  (C) less than 200 Hz  (B) 50 to 100 Hz  (D) more than 1 kHz

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 9 views

Pantograph is (A) a device used to draw Speed-Time characteristics in traction. (B) used to supply a.c. to transformer in locomotive. (C) a part of the control devices in locomotives. (D) used in traction motors for better efficiency.

asked Apr 28, 2018 in Utilization of electrical energy by Shimroz123
1 answer 32 views

Trapezoidal speed-time curve is (A) an exact representation of the conditions in Main-line traction service. (B) an exact representation of the conditions in Suburban traction service. (C) a close approximation of the conditions in Suburban traction service. (D) a close approximation of the conditions in Mainline traction service.

asked Apr 28, 2018 in Utilization of electrical energy by Shimroz123
0 answers 13 views

Is a train a locomotive?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 25 views

Which type of motor is used in lift?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz

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