Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than ______________ mm?

Related Mcqs:

Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle ?

A. Segmental baffle B. Flat plate extending across the wall C. Disk type baffle D. Helical type baffle...

A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by_______________?

A. (ph – dh)/ph B. (ph – dh . dt/2)/ph C. (ph – dt)/ph D. (ph – dh)/dh...

Rotary driers are most economically designed for the number of heat transfer units (HTU) from _________________?

A. 0.01 to 1 B. 1.5 to 2.5 C. 5 to 10 D. 10 to 20...

The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about ______________ kms?

A. 1 B. 5 C. 15 D. 25...

Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of _______________ type?

A. Nozzle or rim B. Flared out C. Fluid in D. Ring plate...