Month: March 2019

Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than ______________ of the head?

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Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than ______________ of the head?

A. 6% of I.D.
B. 3 times the thickness
C. Either A. or B., whichever is larger
D. Either A. or B., whichever is smaller

Pick out the wrong statement pertaining to shell and tube heat exchanger_______________?

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Pick out the wrong statement pertaining to shell and tube heat exchanger_______________?

A. Clearance between shell & baffles and between tube & baffles should be minimum to avoid
by-passing of the fluid, but it should be enough to permit the removal of tube bundle
B. Baffles are supported independently of the tubes by tie rods and positioned by spacers
C. Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum
number of tie rods is 4 with at least 10 mm diameter
D. Bracket supports are used for horizontal shell, while saddle support is used for vertical shell

For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for dia of the tank in question), the thickness of the courses of shell_________________?

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For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for dia of the tank in question), the thickness of the courses of shell_________________?

A. Decreases upwards
B. Increases upwards
C. Remains same throughout
D. May decrease or increase upwards depending upon whether vacuum or positive pressure
would be maintained inside the shell