State types of enclosures of electric drives.

State types of enclosures of electric drives.
by
retagged

1 Answer

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.

by

Related questions

With proper reason suggest type of enclosure for electric drives used in coal mines.

Description : With proper reason suggest type of enclosure for electric drives used in coal mines.

Last 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.

Enlist any four types of enclosures with their applications.

Description : Enlist any four types of enclosures with their applications. 

Last Answer : Types of enclosures & their Applications: i) Open type enclosure:- It is used where motor is installed in clean atmosphere and in closed room.  ii) Screen Protected enclosure:-( ... is circulated through pipe forcefully for cooling of motors and hot air is taken out through pipe.  

What are the factors to be considered while selection of motors for different drives?

Description : What are the factors to be considered while selection of motors for different drives?

Last Answer : Following Factors are considered while selecting electric drive (Motor) for particular application:  Factors to be considered for selection of Electrical Drives:  1) Nature of Supply:- Whether supply ... , load equalization 7) Cost: - Capital, Running and maintenance cost should be less.  

What are the advantages of the use of frequency converter instead of star-delta or soft starter?

Description : Can you guys explain the advantages of frequency converter against the star delta or soft starter?

Last Answer : ¬Soft starters  A soft starter is, as you would expect, a device which ensures a soft starting of a motor. A softstarter has different characteristics to the other starting ... at rated current from zero to full speed. Frequency converters are becoming cheaper all the time.

State advantages of electric heating over other types of heating methods.

Description : State advantages of electric heating over other types of heating methods.

Last 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. 

what are the three different types of Electric power?

Description : what are the three different types of Electric power?

Last Answer : Real,reactive,apparent power

State any Four lE Rules regarding electric safety.

Description : State any Four lE Rules regarding electric safety. 

Last 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 

State Ohm’s law for electric circuit.

Description : State Ohm’s law for electric circuit.

Last 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

State which electric motors are generally used in electro agro systems with reason.

Description : State which electric motors are generally used in electro agro systems with reason.

Last 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.

State elements of diesel electric power plant with their functions.

Description : State elements of diesel electric power plant with their functions. 

Last 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.

State any four advantages and four disadvantages of diesel electric power plant.

Description : State any four advantages and four disadvantages of diesel electric power plant. 

Last Answer : Advantages of Diesel electric power plant:- 1) The design and layout of Diesel electric power plant is simple. 2) It requires less space. 3) Time required for complete erection of diesel power plant is less ... . 9) The useful life is very short. 10) Availability of fuel in future may be limited.

State various effects of electric current and explain any one.

Description : State various effects of electric current and explain any one.

Last Answer : Effects of Electric Current:  1. Magnetic Effect: When a current is passed through a conductor, magnetic field is produced round the conductor. Due to this field when current carrying ... The rise in temperature is converted into elongation of hot wire element causes displacement of pointer. 

State types of enclosures for electric motors.

Description : State types of enclosures for electric motors. 

Last Answer : Types of enclosures for Electric Motor:  i) Open type enclosure:-  ii) Screen Protected enclosure  iii) Drip proof (moisture) enclosure:  iv) Flame (Fire) proof enclosure:-  v) Totally enclosed type enclosure:-  vi) Pipe ventilated totally enclosed type enclosure:

List types of electric furnace.

Description : List types of electric furnace. 

Last Answer : Three Types of Electric furnaces: 1. Induction heating furnace. 2. Resistance heating furnace. 3. Arc furnace.

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.

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.

Last 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

advantages of DVM over electric voltmeter?

Description : advantages of DVM over electric voltmeter?

Last 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.

Suggest electric motors for i) traction ii) crane iii) lathe machine iv) domestic fan.

Description : Suggest electric motors for i) traction ii) crane iii) lathe machine iv) domestic fan.

Last 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

What is mean by electric network?

Last Answer : Any electric network may be defined as a combination of a number of electric elements.

Describe with a neat diagram, the process of any one type of electric welding.

Description : Describe with a neat diagram, the process of any one type of electric welding. 

Last 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.

Electric power formula

Description : Electric power formula

Last Answer : Electric power formula

Nodal Analysis of Electric Circuits Example

Description : Nodal Analysis of Electric Circuits Example

Last 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

List four electric pressure transducer.

Description : List four electric pressure transducer.

Last 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 

"Hydro electric power station are not perennial power station". Justify.

Description : "Hydro electric power station are not perennial power station". Justify.

Last 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" 

Explain starting system in diesel electric power plant.

Description : Explain starting system in diesel electric power plant.

Last 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.

Explain fuel system and air intake system in diesel electric power plant.

Description : Explain fuel system and air intake system in diesel electric power plant.

Last Answer : Fuel system and air intake system in diesel electric power plant :  Fuel system: It consists of storage tank, strainers, fuel transfer pump and all day fuel tank. The fuel oil is supplied ... Filters are provided to remove dust particles from air which may act as abrasive in the engine cylinder.

List out the four applications of diesel electric power plant.

Description : List out the four applications of diesel electric power plant.

Last Answer : Applications of Diesel Power Plant: 1. It can be used as a standby (emergency) power plant to maintain continuity of supply. (Incase failure of main supply like hospital, Telephone exchange Radio stations, ... 10. Diesel plants are widely used for generating power ranging from 100 to 5,000 H.P.

List out any four effects of electric current used in measuring instruments & write name of meter working on it.

Description : List out any four effects of electric current used in measuring instruments & write name of meter working on it.

Last Answer : Effects of Electric Current used in measuring instruments:  1. Magnetic Effect: PMMC and Moving Iron type Ammeters, voltmeter and Dynamometer type wattmeters etc.  2. Electromagnetic induction ... . Electrostatic effect: Voltmeters.  5. Hall Effect: Flux meter, Poynting vector wattmeter.

Compare electric and magnetic circuit.

Description : Compare electric and magnetic circuit.

Last Answer : Comparison between Magnetic and Electric Circuits

Draw a typical electric circuit including ammeter and voltmeter.

Description : Draw a typical electric circuit including ammeter and voltmeter.

Last Answer : The figure shows typical electric circuit including ammeter and voltmeter. Ammeter is connected in series for measurement of current. Voltmeter is connected in parallel for measurement of voltage. Fuse is use ... are used. If the electric supply is DC the DC ammeter and DC voltmeter are used.

kWh meter is the electric meter that measures the amount of electrical _________ in kWh that

Description : kWh meter is the electric meter that measures the amount of electrical _________ in kWh that was consumed in the house.  (A) Energy (B) Current (C) Voltage (D) None of the above

Last Answer : kWh meter is the electric meter that measures the amount of electrical Energy in kWh that was consumed in the house. 

The ability of materials to become polarized under an applied electric field is called _______

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

Last Answer : The ability of materials to become polarized under an applied electric field is called Paraelectricity

Which of the following is the name given to the lines of electric force which move so that its beginning traces

Description : Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

Last Answer : Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative ... A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

The electric field inside a hollow conducting sphere ________

Description : The electric field inside a hollow conducting sphere ________ A) Depends on the diameter of the sphere  B) Varies according to the direction of earth’s magnetic poles C) Is zero  D) None of these

Last Answer : The electric field inside a hollow conducting sphere Is zero

The terminal characteristics of a dc generator suitable for electric welders is

Description : The terminal characteristics of a dc generator suitable for electric welders is (A) separately excited generator (B) shunt generator (C) series generator (D) differentially compounded generator

Last Answer : The terminal characteristics of a dc generator suitable for electric welders is differentially compounded generator

Power factor of electric bulb is?

Description : Power factor of electric bulb is?

Last Answer : Power factor of electric bulb is unity.

Is electric potential zero when electric field is zero?

Description : Is electric potential zero when electric field is zero?

Last Answer : Yes  .If  electric  field  is  zero  then  electric  potential  is  zero  ,  not  even  one.

What is the direction of the induced electric field?

Description : What is the direction of the induced electric field?

Last Answer : It  is  in  opposite  direction   to  the  one  that   produced  it.

Can the electric field between two positive charges be zero?

Description : Can the electric field between two positive charges be zero?

Last Answer : It  can  only  if  they  have  equal  charges.

What is the direction of the electric field?

Description : What is the direction of the electric field?

Last Answer : Electric   field    is  at   right angle   widh  flow  of  current  (right  hand   rule).

What is the direction of flow of electric current in an electric circuit?

Description : What is the direction of flow of electric current in an electric circuit?

Last Answer : It  flows  from  anode  to  cathode  (direction  of   holes  flow)

Explain about Electric Energy Conservation? How Energy conservation can be done in Lighting?

Description : Explain about Electric Energy Conservation? How Energy conservation can be done in Lighting?

Last Answer : Ans: Today in India, the per capita availability of energy is much less than the energy in developed countries. The demand for energy is always out placing availability, the shortfall being ... In streets of rural areas and side streets, street lighting luminaires with fluorescent lamps are used.

Electric Cement Mixers

Description : Electric Cement Mixers

Last Answer : Hand mixing is always imperfect, laborious and slow. Using this method, it is impossible to secure the thorough stirring and kneading action that a good mixing machine gives. If a machine ... material's liquid state, through electronically controlled agitation or turning of the drum until delivery.

Electric Bicycles

Description : Electric Bicycles

Last Answer : For most people, riding a bicycle is a very physical activity. If you're the type who doesn't like the idea of coming to school or work all sweaty and tired, you might have never considered ... allows them to move in the traffic and even in narrow lanes, making them more productive and efficient.

Electric Brake

Description : Electric Brake

Last Answer : An electric brake is a device that uses electrically actuated components to stop or slow the motion of shafts. This type of brake is very useful in applications that require precise tension ... sprocket, gear or pullet. Usually, these electric brakes are designed to accept various drive components.

How to Build an Electric Eye

Description : How to Build an Electric Eye

Last Answer : How to Build an Electric Eye Experimenting with electricity has always been a delight for many people. With the building of an electric eye, it will not only be exciting but it can be used for various ... slide is closed. A rheostat can be used to control the flow of current as you want it.

How to Build an Electric Car

Description : How to Build an Electric Car

Last Answer : How to Build an Electric Car Electric cars are a great way for us to enjoy speed and the thrills of racing cars on a small scale. Most kids grow up with a variety of electric radio ... hobby shop; you can always find good information and other enthusiasts that are interested in electric model cars.

How to Lower Your Electric Bill ?

Description : How to Lower Your Electric Bill ?

Last Answer : How to Lower Your Electric Bill The electric bill captures a huge brunt of your monthly expenses. It contains the accumulated cost of using every electrical device. Lowering the electric bill is clearly ... . Use each of them to your full advantage, preserving your monthly budget in the process.

Electric Sprayer

Description : Electric Sprayer

Last Answer : With technology coming in leaps and bounds since the past century, it is just a matter of time before your average garden and home sprayers evolve too. The evolution comes in the form of the electric ... long as you're okay with the disadvantages it has, then you should be fine with getting it.

Electric Fuel Pumps

Description : Electric Fuel Pumps

Last Answer : There are two types of fuel pumps: mechanical and electric. Before fuel injectors became popular, most engines used mechanical fuel pumps. However, a common problem among these pumps is that fuel ... these improvements, pump failures that are common among cars today should be reduced in the future.

Electric Fans

Description : Electric Fans

Last Answer : The electric fan is one of the most useful appliances in any home. Electric fans are found in all sorts of places: bathrooms, kitchens, living rooms, bedrooms, basements, and so on. Fans serve all sorts of ... electric fan. It won't kill you to try a mounted fan or free-standing fan in your home.