A. Changes in temperature
B. Cross-sectional area
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?
A. Working
B. Damaging
C. Allowable
D. None of these - The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is ______________ stress?
A. Shear
B. Tensile
C. Compressive
D. Thermal - Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is _____________ the longitudinal stress?
A. Half
B. Equal to
C. Twice
D. Eight times - In a thin cylindrical shell, the hoop stress is ________________ stress?
A. Radial
B. Circumferential tensile
C. Compressive
D. Longitudinal - In a cylindrical vessel subjected to internal pressure, the longitudinal stress ζL and the circumferential stress, ζn are related by___________________?
A. ζh = 2 ζL
B. ζh = ζL
C. ζh = ζL/2
D. No relation exists - In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon______________________?
A. Baffle spacing
B. Clearance
C. Pitch
D. None of these - Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the_____________________?
A. Sensible heat differences are small, because the temperature changes from tray to tray is small
B. Trouton’s rule is applicable
C. Liquid/vapor loading across the column remains constant
D. All A., B. and C. - 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. - Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally ____________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8″)?
A. Half
B. Three fourth
C. Equal to
D. 1.5 times - Movement of pipeline caused by thermal expansion is taken care by providing ___________________?
A. Expansion joint
B. Changes in its direction
C. Change in the shape of pipeline
D. All A., B. and C.
