A. More
B. Less
C. Same
D. Either A. or B.; depends upon the I.D. of the pipe
Related Mcqs:
- 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 - The necessary wall thickness for a metallic storage vessel is a function of the ___________________?
A. Ultimate tensile strength (or yield point) of the material and operating temperature
B. Operating pressure and welding/joint efficiency
C. Diameter of the vessel
D. All A., B. and C. - 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 - 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 - 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 - For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?
A. 0.8
B. 0.9
C. 1.0
D. (0.8)0.5 - 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 - The wall thickness of thin cylindrical shell with hemispherical ends is ______________ that of the spherical ends?
A. Equal to
B. More than
C. Less than
D. Either B. or C.; depends on maximum permissible internal pressure
