A. Hemispherical
B. Elliptical
C. Torispherical
D. None of these
Related Mcqs:
- A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the__________________?
A. Central dished section and corner torus section
B. Corner torus section and central dished section
C. Central dished section and straight flange section
D. Straight flange section and corner torus section - Generally, elliptical dished heads____________________?
A. Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for
pressure vessels operating above a pressure of 1.5 MN/m2
B. Resist half the pressure rating compared to hemi spherical head provided on the cylindrical
shell of the same thickness and diameter
C. Are approximately as strong as seamless cylindrical shell having the corresponding I.D and
O.D
D. All A., B. and C. - 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 - ____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?
A. Hemispherical
B. Dished
C. Ellipsoidal
D. Conical - For pipe flows, head is proportional to ______________ at constant capacity (where D = pipe diameter) ?
A. 1/D
B. 1/D2
C. 1/D5
D. D2 - The ends of a cylindrical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure ?
A. Flat plate
B. Hemispherical
C. Torispherical
D. Ellipsoidal - Floating head heat exchangers are used for the____________________?
A. Heat transfer between corrosive fluids
B. Cases where temperature difference between the shell and the tubes is more (>50°C)
C. Co-current heat transfer systems
D. Counter-current heat transfer systems - The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally _____________ the tube wall thickness?
A. Equal to
B. Twice
C. Four times
D. Half - The minimum tray spacing in distillation column of diameter less than 3 ft is normally _____________ inches?
A. 6
B. 18
C. 24
D. 34 - If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will _____________ times?
A. Increase by 1.8
B. Decrease by 22
C. Increase by 21.6
D. None of these
