Basic questions asked in HPCL(instrumentation) in refinery section

1 Answers   HPCL,

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Corona occurs more in winter or rain?

1 Answers   UPPCL,

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What is the DG power factor ? how?

0 Answers  

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Question 98 - The Planck-Einstein relation connects the particulate photon energy E with its associated wave frequency f to produce E = hf. Let h to be the Planck constant. The frequency f, wavelength L and speed of light c are related by E = hc / L. With p denoting the linear momentum of a particle, the de Broglie wavelength L of the particle is given by L = h / p. (a) Find the equation of E as a function of p and c. (b) If E has a unit of electron-volt and f has a unit of 1 / second, then what is the unit of h?

1 Answers  

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Question 97 - Two viruses a and b with masses of Ma and Mb are moving at velocities of Va and Vb respectively, facing towards each other and collide. After collision both masses of Ma and Mb disappear. (a) Find the total momentum available for both a and b. Hint : momentum = mass x velocity = M x V. (b) Guess the total energy E generated from the disappearance of a and b. Let c to be the velocity of light. Hint : E is equal to M c square.

1 Answers  

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i want MEIL placementt papers

0 Answers   MEIL,

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What is sub category?

1 Answers   DBS,

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why we use transformers?

0 Answers  

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difference between gauges and comparator

0 Answers  

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Which LED light is better for fire safety? 24 V DC or 220 VAC? (In fireproof factory Godown)

0 Answers  

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What is smoke testing and sanity testing in software testing

0 Answers   Fresher,

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In an existing power plant (phase I) with step up transformers (3nos) with Ynd1 vector group to the 400KV bus bar,an extension power plant (phase II) with transformers (4nos) with Ynd11 vector group >. what are the consequences of such configuration ,please note that % impedance are also differ i.e. 15% & 10.5% the reason was that auxiliary supply interface is at different voltage levels i.e 400v & 6.6KV in phase i and phase II respectively .please advise ! Thank you !

1 Answers  

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