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Depreciation charges are high in case of thermal plant.

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Annual depreciation as per straight line method, is calculated by the capital cost minus the salvage value, is divided by the number of years of life.

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In Hopknison demand rate or two part tariff the demand rate or fixed charges are dependent upon the maximum demand of the consumer.

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A consumer has to pay lesser fixed charges in maximum demand tariff.

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Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax 

Answer :

(i) Connected load  It is the sum of the power ratings (Watts or kW or MW) of all devices and machines existing (installed) in the premises of consumer. It is used to decide the ... a percentage of the total electricity bill which includes all amounts that go to the electricity supply agency. 

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Can the electric field between two positive charges be zero?

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It  can  only  if  they  have  equal  charges.

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For high value of diversity factor, a power station of given installed capacity will be in a position to supply more number of consumers.

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Auto reclosing is used in case of

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Auto reclosing is used in case of air blast C.B.

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In the case of direct current?

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In the case of direct current magnitude and direction of current remains constant.

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In case of steam engines the steam pressure is 10 to 15 kgf/cm2.

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In case of locomotives the tractive power is provided by double cylinder, double acting steam engine.

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In case of a flat compounded generator voltage remains constant irrespective of the load.

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In the case of lap winding resultant pitch is difference of front and back pitches.

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An induction motor has relatively high power factor at near full load.

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High load factor indicates total plant capacity is utilised for most of the time.

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Write down the method used for following product : (i) credit card (ii) carrying case (iii) hollow cylinder (iv) knobs

Answer :

i) Credit Card :- Plastic compounding and molding, Printing, Lamination, Cutting and Embossing. ii) Carrying case:- injection moulding iii) Hollow cylinder:- extrusion iv) Knobs:- compression moulding

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The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to extinguish the arc.

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Wire-wound resistors are unsuitable for use at high frequencies because they?

Answer :

Wire-wound resistors are unsuitable for use at high frequencies because they exhibit unwanted inductive and capacitive effects.

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What are the advantages of high voltage transmission?

Answer :

Advantages:  1. As Transmission voltage increases, current decreases. 2. As current decreases, cross section of conductor decreases. 3. As cross section of conductor decreases ... line increases  12. As transmission voltage increases power handling capacity of transmission line increases 

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Why transmission voltages are high?

Answer :

If current is high then I2R losses will be more .If I2R losses is more then heat generated is more. By heat or increasing temperature resistance will also be increase which will decrease ... voltage we are decreasing current which is advantageous. That's why transmission voltages is high.

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127 views 2 answers
Description :

State the advantages of use of high voltage in transmission of Electric power. 

Answer :

Advantages: 1. As Transmission voltage increases, current decreases. 2. As current decreases, cross section of conductor decreases. 3. As cross section of conductor decreases, its ... high voltage transmission line, successful interconnection of transmission line is possible than low voltage. 

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Description :

The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

Answer :

The number of cycles in which a high speed circuit breaker can complete its operation is 3 to 8

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Which rotor is use for high speed in turbo alternators?

Answer :

Non-salient pole rotor is used for high speed in turbo alternators.

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Why high voltage is used in power transmission?

Answer :

The primary reason that power is transmitted at high voltages is to increase efficiency. ... The lower current that accompanies high voltage transmissionreduces resistance in the conductors aselectricity flows ... This means that thin, light-weight wires can beused in long-distance transmission.

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Limitation and application of High Voltage DC (HVDC)

Answer :

Limitation and application of High Voltage DC (HVDC) :  Limitation:- 1) It is difficult to step up and step down DC voltage like AC voltage. 2) Special cooling ... conventional/non-conventional) 12) Increasing existing grid utilization. 13) Interconnection of different grids or networks

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Description :

Name two methods for measurement of low, medium and high resistance. Give one advantage and one limitation of V- I method.

Answer :

Methods for measurement of low resistance:  1. Ammeter voltmeter method  2. Kelvin's bridge method  3. Ohm meter method  4. Potentiometer method  5. Digital/analog multi-meter ... must be infinity for perfectly accurate measurement which is not possible.  2. Connection errors.

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Description :

Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO 

Answer :

Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO 

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Description :

Which of the following circuit breakers has high reliability & minimum maintenance?  (A) Bulk oil type CB (B) Air blast CB (C) Vacuum CB (D) Sulphur hexafluoride CB 

Answer :

Which of the following circuit breakers has high reliability & minimum maintenance?  (A) Bulk oil type CB (B) Air blast CB (C) Vacuum CB (D) Sulphur hexafluoride CB 

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159 views 1 answer
Description :

Step-down transformer converts high voltage and low current into:  (A) How voltage and high current (B) High voltage and low current (C) Low voltage and high current (D) None of the above

Answer :

Step-down transformer converts high voltage and low current into: Low voltage and high current

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Description :

Which type of ADC gives high resolution?

Answer :

Sigma Delta, successive approximation and integrating type analogue to digital converter gives very high resolution but they have slower speed.

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Description :

At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because (A) Of drive in diffusion of dopants & carriers. (B) Band to band transition dominates impurity ionization. (C) Impurity ionization dominates band to band transition. (D) Band to band transition is balanced by impurity ionisation.

Answer :

At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because Impurity ionization dominates band to band transition.

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385 views 1 answer
Description :

For high efficiency of transfer of power, internal resistance of the source should be?

Answer :

For high efficiency of transfer of power, internal resistance of the source should be less than the load resistance.

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387 views 1 answer
Description :

All good conductors have high?

Answer :

All good conductors have high conductance.

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Description :

Power factor of the system is kept high?

Answer :

Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line.

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Description :

Answer :

For measurement of inductance having high value, we should use Hay's bridge.

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Answer :

For measurements on high voltage capacitors, the suitable bridge is Schering bridge.

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Answer :

For measuring a very high resistance we should use Meggar.

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Answer :

For measuring current at high frequency we should use thermocouple instrument.

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Answer :

Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of D.C. series motor.

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Which capacitor is used for high frequency?

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Why a dc series motor has a high starting torque?

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Description :

Why high starting torque is required?

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Description :

Why does induction motor have high starting current?

Answer :

In induction motor , the flux produce is quadrature to the applied voltage. Since when we are going to start motor , there is no flux present inside . So in order to lets say compensate it ... times of current to further increase flux. So that is reason for high starting current in induction motor

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Description :

What can cause high amperage on a motor?

Answer :

High  amperage  can  result  in  a motor  when the  amount  of  load  increases. when  load  increases  , it  reduces  the  rotor  speed which  increases  the  slip  at  constant  synchronous  speed ... ,  as  a  result  more  current  shall  have  been  drawn  to  maintain  the  additional  load.

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Description :

What is a high tension power line?

Answer :

High tension power line is a high voltage of 115 kv and power line is underground transimissio used by urbun areas

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Description :

Why is it cheaper to transmit electrical energy at high voltage?

Answer :

Because of the electrical energy was step upped by transformers the transformer have high efficiency than the electric energy is cheaper

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Description :

What is meant by extra high voltage transmission?

Answer :

HT & LT  two types transmission in industrial line 

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Why high voltage test is done?

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Why high voltage can reduce power loss?

Answer :

when voltage has increased due to reduced current flow, thus power loss given by ( I^2R) will be low due to reduced current(I^2) provided that resistance (R) is constant.

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Description :

What is Extra High Voltage?

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Description :

What is a high voltage test?

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