Description : What is an electric motor drive?
asked
Mar 10, 2018
by
anonymous
Description : What is the use of an electric motor?
Answer :
Electrical motors are use for converting electrical energy to mechanical energy. It may be use in fans, pumps, washing machine, cranes, trains, factories, industries etc.
asked
Dec 16, 2017
by
anonymous
Answer :
A hysteresis motor works on the principle of hysteresis loss.
asked
Mar 20, 2018
by
anonymous
Description : What does an electric drive do?
asked
Mar 10, 2018
by
anonymous
Answer :
The power mentioned on the name plate of an electric motor indicates the output power available at the shaft.
asked
Mar 20, 2018
by
anonymous
Description : An electric motor in which both stator field and rotor rotates with same speed is called?
Answer :
An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.
asked
Mar 18, 2018
by
anonymous
Description : Explain in brief how anti-lock braking system works
Answer :
An ABS is a system on motor vehicles which prevents the wheels from locking while braking stopping safely is one of the most important functions a motor vehicle can perform. Diagram: ... to decrease the pressure on the braking circuit, effectively reducing the braking force on that wheel.
asked
Aug 9, 2019
by
anonymous
Description : How do relay works ?
Answer :
Relay working like contact it is noise less
asked
Dec 30, 2017
by
anonymous
Description : Describe the reason of using dc series motor for electric trains.
Answer :
Electric trains require an inverse torque speed characteristics for proper operation. That is a higher torque is required at start (when speed is nil or low) and as the train picks up ... torque - speed characteristics of DC series motors match, these motors are suitable for electric trains
asked
Sep 18, 2018
by
anonymous
Description : 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
Answer :
The motor used for electric traction is D.C. series motor
asked
May 1, 2018
by
anonymous
Answer :
The electric motor used in portable drills is universal motor.
asked
Mar 20, 2018
by
anonymous
Description : The transformer works on the principle of: (A) Mutual induction (B) Mutual capacitance (C) All of the above (D) None of the above
Answer :
The transformer works on the principle of: Mutual induction
asked
May 8, 2018
by
anonymous
Description : How does electric locomotive work?
Answer :
Electric locomotives are powered by motors connected to battery or any supply . The electric supply is connected to a motor which drives set of gears connected to wheels.
asked
Mar 11, 2018
by
anonymous
Description : What does an electric meter measure?
asked
Mar 10, 2018
by
anonymous
Description : The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Answer :
The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
asked
Mar 18, 2018
by
anonymous
Description : How can a magnetic field be used to generate an electric current?
Answer :
Magnetic field can be used to generate electric current on a condition that it is on a rate of changing magnetic flux. (Faraday's law)
asked
Mar 10, 2018
by
anonymous
Description : How does a single phase induction motor work?
Answer :
As we know that single phase induction is not self started because for self started we require atleast two revolving field but single phase induction motor has only one. So we provide extra ... 1phase IM classified as split phase IM, capacitor start capacitor run, capacitor start induction run.
asked
Mar 17, 2018
by
anonymous
Description : How does a PSC motor work?
asked
Mar 15, 2018
by
anonymous
Description : What is a servo motor and how does it work?
Answer :
It is a simple electrical motor that is operated by AC or DC signal in order to provide a precise angular motion for a given electrical signal.
asked
Mar 10, 2018
by
anonymous
Description : List three important characteristics of an electric circuit.
asked
Jun 29, 2019
by
anonymous
Description : An _____________is a network of electrical components used to supply, transfer and use electric power: (A) Electric power system (B) Electric power (C) All of the above (D) None of the above
Answer :
An Electric power system is a network of electrical components used to supply, transfer and use electric power.
asked
May 8, 2018
by
anonymous
Description : The ability of materials to become polarized under an applied electric field is called _______ A) Ferroelectricity B) Paraelectricity C) Polectricity D) None of these
Answer :
The ability of materials to become polarized under an applied electric field is called Paraelectricity
asked
Apr 29, 2018
by
anonymous
Description : Specific energy consumption of an electric train is the ratio between (A) Specific energy output at driving wheels and efficiency of the traction motor (B) Specific energy output at driving wheels and efficiency of the transmission gear (C) Specific energy output of driving motor and efficiency of the driving wheels (D) Specific energy output at driving wheels and efficiency of the (motor + transmission gear)
Answer :
Specific energy consumption of an electric train is the ratio between Specific energy output at driving wheels and efficiency of the (motor + transmission gear)
asked
Apr 28, 2018
by
anonymous
Description : The filament of an electric bulb is made of?
Answer :
The filament of an electric bulb is made of tungsten.
asked
Mar 25, 2018
by
anonymous
Description : An instrument which detects electric current is known as?
Answer :
An instrument which detects electric current is known as galvanometer.
asked
Mar 25, 2018
by
anonymous
Answer :
Meggar is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another.
asked
Mar 21, 2018
by
anonymous
Description : What is the direction of flow of electric current in an electric circuit?
Answer :
It flows from anode to cathode (direction of holes flow)
asked
Mar 14, 2018
by
anonymous
Description : List types of electric furnace.
Answer :
Three Types of Electric furnaces: 1. Induction heating furnace. 2. Resistance heating furnace. 3. Arc furnace.
Description : Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Answer :
Parts Insulating Materials Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils. ... Transformer bushings Porcelain Insulation between transmission line and pole. Porcelain
asked
May 7, 2020
by
anonymous
Description : State any Four lE Rules regarding electric safety.
Answer :
lE Rules regarding electric safety: 1. IE Rule 3 : Authorization 2. IE Rule 29 : Construction and maintenance of electrical supply line and apparatus 3. IE Rule 30: Service line and apparatus on ... 26. IE Rule 60: Test for resistance of insulation 27. IE Rule 61: Connection with earth
asked
May 7, 2020
by
anonymous
Description : Electric Power
Answer :
Electric Power
asked
Apr 8, 2020
by
anonymous
Description : advantages of DVM over electric voltmeter?
Answer :
Advantages: 1) In case of digital volt meter the output signals is available in the form of discrete numerical. Where as in analog voltmeter, output is made available by using pointer ... using a suitable transducer the quantities such as temperature, pressure, etc. can also be measured.
asked
Aug 21, 2019
by
anonymous
Description : State Ohm’s law for electric circuit.
Answer :
Ohms law -States that the current flows in a circuit is directly proportional to the applied voltage (V) and inversely the proportional resistance provided with the temperature main constant
asked
Aug 17, 2019
by
anonymous
Description : With proper reason suggest type of enclosure for electric drives used in coal mines.
Answer :
Flame-proof type of enclosure for electric drives is used in coal mines. Reason: - Coal mines are very hazardous, prone to flame and explosions. Under such conditions, flame proof type ... them (due to arcs, sparks, or flashes) without igniting the surrounding flammable gases or vapors.
asked
Aug 17, 2019
by
anonymous
Description : State advantages of electric heating over other types of heating methods.
Answer :
Advantages of Electric heating over the other types of heating methods: 1. It can be put into service immediately. 2. No standby losses. 3. High efficiency. 4. More economical ... low attention and supervision. 14. Protection against overheating can be provided by suitable switch gear.
asked
Aug 17, 2019
by
anonymous
Description : Suggest electric motors for i) traction ii) crane iii) lathe machine iv) domestic fan.
Answer :
i) Traction :- DC Series motor ii) Crane :- DC Series motor iii) Lathe machine :- 3 phase Induction motor or DC shunt motor iv) Domestic fan :- 1 phase induction motor
asked
Aug 17, 2019
by
anonymous
Description : State which electric motors are generally used in electro agro systems with reason.
Answer :
1) 3 phase induction motor is used in electro agro system for water pumping from wells as 3 phase ac supply is easily available, cost of induction motor is less, maintenance free being rugged ... as 1 phase ac supply is easily available for domestic purpose, repair is simple and easily available.
asked
Aug 17, 2019
by
anonymous
Description : State types of enclosures of electric drives.
Answer :
Types of enclosures of Electric Drives: 1) Screen protected 2) Open type 3) Protected type 4) Totally enclosed 5) Drip-proof type 6) Pipe ventilated type 7) Flame proof type 8) Explosion proof 9) Splash proof.
asked
Aug 17, 2019
by
anonymous
Description : Electric Current
Answer :
Electric current is the flow of charges. The electrons flow from higher density area of electrons to lowers density area of electrons. The terminal of battery which we called positive terminal of ... circuit is called electric current. The unit of electric current is Coulomb per Second or Ampere.
asked
Aug 15, 2019
by
anonymous
Answer :
Any electric network may be defined as a combination of a number of electric elements.
asked
Aug 14, 2019
by
anonymous
Description : State elements of diesel electric power plant with their functions.
Answer :
Elements of Diesel Power Plant with their function): 1) Diesel Engine: - This is the main component of the P.P. which develops mechanical power. 2) Engine air intake system: - Air ... fuel as per requirement. 10) Alternator: - Its function is to convert mechanical power into electrical power.
asked
Aug 2, 2019
by
anonymous
Description : Describe with a neat diagram, the process of any one type of electric welding.
Answer :
Methods of electric welding : 1. Resistance welding i Butt welding ii Spot welding iii Seam welding iv Projection welding 2. Arc Welding i Carbon arc welding ii ... as copper, iron etc. The electric arc effectively concentrate heat on the surfaces it is desired to join.
asked
Jul 30, 2019
by
anonymous
Description : Briefly describe the electric field of a static charge.
asked
Jun 29, 2019
by
anonymous
Description : A) Watt B) Volts C) Farad D) Ampere
Answer :
Correct answer: D) Ampere
asked
Jun 28, 2019
by
anonymous
Description : Options: A) WATT B) AMPERE C) VOLTS D) OHM
Answer :
Correct Answer: A) WATT
asked
Jun 28, 2019
by
anonymous
Description : Electric power formula
Answer :
Electric power formula
asked
Jun 11, 2019
by
anonymous
Description : Nodal Analysis of Electric Circuits Example
Answer :
Nodal Analysis of Electric Circuits Example 1 : https://youtu.be/XLS6kDQuHj0 Nodal Analysis of Electric Circuits Example 2 : https://youtu.be/OFhurvl74bA Nodal Analysis of Electric Circuits ... youtu.be/GmOozdjTVtM Nodal Analysis of Electric Circuits Example 9 : https://youtu.be/KjgfjJ7Ubb8
asked
May 21, 2019
by
anonymous
Description : List four electric pressure transducer.
Answer :
List of electric pressure measuring devices: 1. Diaphragm with strain gauge 2. Bourdon Tube with LVDT 3. Differential Pressure cell 4. Piezoelectric type pressure transducer 5. Capacitance pressure transducer 6. Optical Pressure transducer 7. Resistive pressure transducer
asked
Sep 8, 2018
by
anonymous
Description : "Hydro electric power station are not perennial power station". Justify.
Answer :
Justification: The water utilized by the hydro power plants comes mostly from storage dams/reservoirs which get filled up during the monsoon rainy season. Such reservoirs are utilized for supplying ... are important. Hence "Hydro electric power stations are not perennial power station"
asked
Sep 8, 2018
by
anonymous
Description : Explain starting system in diesel electric power plant.
Answer :
Starting system in Diesel Electric Power Plant: It includes Storage battery, compressed air tanks, self-starter etc. The purpose of engine starting system is to rotate the engine initially while ... as Ammeters, Voltmeters, Wattmeters, Thermometers, Pressure gauges, Visible and audible alarm etc.
asked
Sep 8, 2018
by
anonymous