Get premium membership and access questions with answers, video lessons as well as revision papers.
Working of a welding machine:
A welding process is required to join two metal parts by heating them to melting point.
Electrical welding is used for joining of fabricating structures, machinery parts, pipes, bus
bars, bridges, ships railway bogies etc.
Electrical welding has two distinct types:
- Resistance welding : In resistance welding the current is passed through the joint to be
welded and the heat is caused by I2 R losses in the joint, melting of metal and subsequent
welding under pressure between faces to be welded.
- Arc welding : The heat is produced by the arc struck between the welding electrode and the
metal to be welded. Pressure is not applied between faces to be welded.
gregorymasila answered the question on February 22, 2018 at 16:07
- How is the speed of a DC shunt motor controlled?(Solved)
How is the speed of a DC shunt motor controlled?
Date posted: February 20, 2018. Answers (1)
- Where are synchronous motors used?(Solved)
Where are synchronous motors used?
Date posted: February 20, 2018. Answers (1)
- What are the essential differences between H.V. and L.V. switchgears?(Solved)
What are the essential differences between H.V. and L.V. switchgears?
Date posted: February 20, 2018. Answers (1)
- Why are different levels of voltages used for generation, transmission and
distribution of electric power?(Solved)
Why are different levels of voltages used for generation, transmission and
distribution of electric power?
Date posted: February 20, 2018. Answers (1)
- What do you mean by transmission line efficiency and regulation? Can it be
negative also?(Solved)
What do you mean by transmission line efficiency and regulation? Can it be
negative also?
Date posted: February 20, 2018. Answers (1)
- List out the advantages of nuclear power plants over conventional thermal power
plants.(Solved)
List out the advantages of nuclear power plants over conventional thermal power
plants.
Date posted: February 20, 2018. Answers (1)
- What are the various types of electric drives? Compare their advantages and
disadvantages. State and explain the various factors which affect the selection of an...(Solved)
What are the various types of electric drives? Compare their advantages and
disadvantages. State and explain the various factors which affect the selection of an
electric motor as industrial drive.
Date posted: February 20, 2018. Answers (1)
- Explain principle of carrier current protection and communication.(Solved)
Explain principle of carrier current protection and communication.
Date posted: February 20, 2018. Answers (1)
- Discuss the criteria for choice of voltage for transmission and distribution.(Solved)
Discuss the criteria for choice of voltage for transmission and distribution.
Date posted: February 20, 2018. Answers (1)
- Write short notes on Induction heating:(Solved)
Write short notes on Induction heating:
Date posted: February 20, 2018. Answers (1)
- Discuss methods of laying underground cables.(Solved)
Discuss methods of laying underground cables.
Date posted: February 20, 2018. Answers (1)
- Explain the working of nickel cadmium cells with its merits and demerits over lead acid cell(Solved)
Explain the working of nickel cadmium cells with its merits and demerits over lead acid cell
Date posted: February 20, 2018. Answers (1)
- What are the advantages of high voltage transmission? Give its limitations also.(Solved)
What are the advantages of high voltage transmission? Give its limitations also.
Date posted: February 20, 2018. Answers (1)
- List the advantages of nuclear power plants over conventional thermal power plants.(Solved)
List the advantages of nuclear power plants over conventional thermal power plants.
Date posted: February 20, 2018. Answers (1)
- What is the fundamental difference between thermal and nuclear power plants?(Solved)
What is the fundamental difference between thermal and nuclear power plants?
Date posted: February 20, 2018. Answers (1)
- What are different welding controls used in resistance welding?(Solved)
What are different welding controls used in resistance welding?
Date posted: February 20, 2018. Answers (1)
- With the aid of sketches explain the operation of a four stroke engine(Solved)
With the aid of sketches explain the operation of a four stroke engine.
Date posted: February 16, 2018. Answers (1)
- Name 3 drawing instruments commonly used in technical drawing and define the use of each tool(Solved)
Name 3 drawing instruments commonly used in technical drawing and define the use of each tool
Date posted: January 26, 2018. Answers (1)
- Highlight different methods of water treatment.(Solved)
Highlight different methods of water treatment.
Date posted: January 15, 2018. Answers (1)
- Name any five factors which determine choice of roof structure(Solved)
Name any five factors which determine choice of roof structure.
Date posted: January 1, 2018. Answers (1)