A. Expansion joint
B. Changes in its direction
C. Change in the shape of pipeline
D. All A., B. and C.
Related Mcqs:
- Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing___________________?
A. Rupture diaphragm
B. Dikes
C. Surge chamber
D. None of these - A/an _______________ is used for changing the direction of a pipeline?
A. Elbow
B. Union
C. Flange
D. Disc compensator - The wall thickness for a large high pressure pipeline is determined by the consideration of the____________________?
A. Axial tensile stress in the pipe
B. Forces exerted by static and dynamic action at bends
C. Circumferential pipe-wall tension
D. Temperature stresses - Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around______________________?
A. 5 and 10
B. 45 and 75
C. 180 and 300
D. 300 and 500 - 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 - A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________?
A. Only if the opening is on spherical vessel
B. Only if the opening is on a vertical cylindrical vessel
C. Only if the opening is on a horizontal cylindrical vessel
D. Irrespective of the shape of the vessel - Which of the following is the best tube material from thermal conductivity point of view alone ?
A. Aluminium
B. Stainless steel
C. Copper
D. Carbon steel - The thermal stress in a metallic bar does not depend upon the_____________________?
A. Changes in temperature
B. Cross-sectional area
C. Both A. and B.
D. Neither A. nor B. - Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as ____________________?
A. 0.01
B. 0.3
C. 0.75
D. 0.95 - Welded joint efficiency in the design of chemical process equipment is taken as_________________?
A. 0.55
B. 0.75
C. 0.85
D. 0.95
