Answer :
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.
asked
Mar 20, 2018
by
anonymous
Answer :
In Hopknison demand rate or two part tariff the demand rate or fixed charges are dependent upon the maximum demand of the consumer.
asked
Mar 20, 2018
by
anonymous
Answer :
A consumer has to pay lesser fixed charges in maximum demand tariff.
asked
Mar 20, 2018
by
anonymous
Description : 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.
asked
Sep 22, 2018
by
anonymous
Description : Can the electric field between two positive charges be zero?
Answer :
It can only if they have equal charges.
asked
Mar 14, 2018
by
anonymous
Answer :
For high value of diversity factor, a power station of given installed capacity will be in a position to supply more number of consumers.
asked
Mar 20, 2018
by
anonymous
Description : Auto reclosing is used in case of
Answer :
Auto reclosing is used in case of air blast C.B.
asked
May 3, 2018
by
anonymous
Description : In the case of direct current?
Answer :
In the case of direct current magnitude and direction of current remains constant.
asked
Mar 25, 2018
by
anonymous
Answer :
In case of steam engines the steam pressure is 10 to 15 kgf/cm2.
asked
Mar 22, 2018
by
anonymous
Answer :
In case of locomotives the tractive power is provided by double cylinder, double acting steam engine.
asked
Mar 22, 2018
by
anonymous
Answer :
In case of a flat compounded generator voltage remains constant irrespective of the load.
asked
Mar 21, 2018
by
anonymous
Answer :
In the case of lap winding resultant pitch is difference of front and back pitches.
asked
Mar 20, 2018
by
anonymous
Answer :
An induction motor has relatively high power factor at near full load.
asked
Mar 20, 2018
by
anonymous
Answer :
High load factor indicates total plant capacity is utilised for most of the time.
asked
Mar 20, 2018
by
anonymous
Description : 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
Answer :
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.
asked
Mar 20, 2018
by
anonymous
Description : 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.
asked
Mar 25, 2018
by
anonymous
Description : 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
asked
Mar 10, 2018
by
anonymous
Description : 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.
asked
Dec 16, 2017
by
anonymous
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.
asked
May 22, 2020
by
anonymous
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
asked
May 8, 2018
by
anonymous
Description : Which rotor is use for high speed in turbo alternators?
Answer :
Non-salient pole rotor is used for high speed in turbo alternators.
asked
Mar 18, 2018
by
anonymous
Description : 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.
asked
Mar 10, 2018
by
anonymous
Description : 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
asked
Aug 25, 2019
by
anonymous
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.
asked
Sep 6, 2018
by
anonymous
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
asked
Jun 18, 2018
by
anonymous
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
asked
May 8, 2018
by
anonymous
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
asked
May 8, 2018
by
anonymous
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.
asked
May 4, 2018
by
anonymous
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.
asked
Apr 28, 2018
by
anonymous
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.
asked
Mar 25, 2018
by
anonymous
Description : All good conductors have high?
Answer :
All good conductors have high conductance.
asked
Mar 25, 2018
by
anonymous
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.
asked
Mar 25, 2018
by
anonymous
Answer :
For measurement of inductance having high value, we should use Hay's bridge.
asked
Mar 21, 2018
by
anonymous
Answer :
For measurements on high voltage capacitors, the suitable bridge is Schering bridge.
asked
Mar 21, 2018
by
anonymous
Answer :
For measuring a very high resistance we should use Meggar.
asked
Mar 21, 2018
by
anonymous
Answer :
For measuring current at high frequency we should use thermocouple instrument.
asked
Mar 21, 2018
by
anonymous
Answer :
Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of D.C. series motor.
asked
Mar 20, 2018
by
anonymous
Description : Which capacitor is used for high frequency?
asked
Mar 15, 2018
by
anonymous
Description : Why a dc series motor has a high starting torque?
asked
Mar 15, 2018
by
anonymous
Description : Why high starting torque is required?
asked
Mar 15, 2018
by
anonymous
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
asked
Mar 15, 2018
by
anonymous
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.
asked
Mar 15, 2018
by
anonymous
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
asked
Mar 10, 2018
by
anonymous
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
asked
Mar 10, 2018
by
anonymous
Description : What is meant by extra high voltage transmission?
Answer :
HT & LT two types transmission in industrial line
asked
Mar 10, 2018
by
anonymous
Description : Why high voltage test is done?
asked
Mar 10, 2018
by
anonymous
Description : 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.
asked
Mar 10, 2018
by
anonymous
Description : What is Extra High Voltage?
asked
Mar 10, 2018
by
anonymous
Description : What is a high voltage test?
asked
Mar 10, 2018
by
anonymous