My Interview Questions And Answers [Electronics,Electrical and Instrumentation]

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July 15, 2009

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"You cannot be successful in any business without believing that it is the greatest business in the world. You have to put your heart in the business and the business in your heart"

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Difference between megger and earth tester?

Interview Question: Difference between megger and earth tester? Answer: Megger is an instrument which in addition to measurement of high resistance can be used to test the quality of the insulation at or above its operating voltage. whereas earth tester is used to measure low earth resistance. Megger is used for measuring an insulation resistance of motor winding of cable etc. which is measured in megaohm. While earth tester has earth electrodes which are used to measure eathpit resistance & it is measured in ohm.

Difference between electrical and electronics?

Interview Question: What is the main difference between electrical& electronics? Define them. Answer: In Electronics, as we study about the motion of electrons in the semi conducting materials, the currents and voltages are of very negligible values. With the less amounts of current and voltages we are able to perform many tasks using Electronics. Where as in electrical, it is the study of motion of electrons in metals.So, usually the conductivity is more for metals, so more voltage of order 230v and more currents of higher order amps are used.

Why is Flow measure in Square-root?

Interview QUestion: Why is Flow measure in Square-root? Answer: Where orifice plate is used to measure flow alone, the signal is square rooted. it is by the formula Q=K (squareroot of Differential pressure). If other types of FT are used then the signal from that FT need not to be square rooted.

Job Inspirational Quotes

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