Answer / Rama Shankar Karn

White rust formation on zinc plated and yellow passivated fasteners during CED (Chromate conversion electrodeposition) painting is due to the presence of moisture, carbon dioxide, and chlorides in the environment. The corrosive agents react with the zinc coating forming basic zinc carbonates, which transform into white rust over time.

Three solid objects of the same material and of equal mass – a sphere, a cylinder (length = diameter) and a cube – are at 5000C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change of temperature is smallest for a) cube b) cylinder c) sphere d) equal for all the three whyyyyyyy???????

3 Answers   GATE,

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ELECTRICAL TECHNOLOGY - EXAMPLE 16.2 : In a selection of suitable heating equipment for drying of crystals of biochemical, the one of the lowest current consumption will be chosen for safety consideration. Selection is available : (A) 120 V microwave oven 1800 W. (B) 240 V conventional oven 11000 W. Which one should be chosen and why?

1 Answers  

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ENGINEERING MECHANIC - EXAMPLE 15.2 : A cantilever beam of length L = 3 m carries a uniformly distributed load (UDL) of W = 20 N / m throughout the length. Calculate the bending moment, BM of the beam near the fixed end. What is the shear force, SF at this point? Let SF = -WL, BM = -LWL/2.

1 Answers  

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What is the difference between coagulation and flocculation in water treatment plant?

1 Answers  

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I want previous year question paper of ONGC for chemical engg.

0 Answers  

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Explain what are some typical applications for glass-lined reactors?

1 Answers  

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What is the symbol of sodium?

1 Answers  

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Explain what are the advantages of using gear pumps?

1 Answers  

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where can i get previous question papers of GATE in chemical engineering

7 Answers   CPCL,

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Are fin tubes necessary for steam heating a liquid?

7 Answers   IOCL,

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Question 61 – A biochemical trolley of mass 15 kg is towing a trailer of mass 5 kg along a straight horizontal pathway. The trailer and the trolley are connected by a light inextensible tow-bar. The engine of the trolley exerts a driving force of magnitude 100 N. The trailer and the trolley experience resistances of magnitude 10 N and 30 N respectively. (a) Form 2 equations with unknowns T and a, that represents the equilibrium for the 2 systems of the trolley and trailer. (b) Solve the simultaneous equations from the 2 equations that are obtained in part (a) of this question. T is the tension of the tow-bar and a is the acceleration.

1 Answers  

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Hi, This is Naveen, plz if anybody have experience of IOCL interview, send me question.

1 Answers  

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