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
Related Mcqs:
- Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?
A. 1 to 5
B. 10 to 20
C. 30 to 40
D. 40 to 50 - 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 - Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than ______________ mm?
A. 10
B. 20
C. 30
D. 5 - Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than _____________ mm outside diameter is generally not recommended for fouling fluids ?
A. 16
B. 19
C. 28
D. 38 - In case of a ‘thin’ pressure vessel, the ratio of its diameter to wall thickness is_________________?
A. < 10
B. > 10
C. > 20
D. 30 - A pressure vessel is said to be made of ‘thick’ shell, if the ratio of its diameter to wall thickness is_______________?
A. < 10
B. > 10
C. > 20
D. < 20 - 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 - Optimum economic pipe diameter for fluid flow is determined by the____________________?
A. Viscosity of the fluid
B. Density of the fluid
C. Total cost considerations (pumping cost plus fixed cost of the pipe)
D. None of these - A cylindrical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to________________?
A. 5 mm
B. 6 mm
C. 8 mm
D. 10 mm - Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?
A. Larger dia vessel
B. Smaller dia vessel
C. Larger dia long vessel
D. Strength of the vessel is same irrespective of the diameter
