Process Equipment and Plant Design The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm. Half Three fourth Equal to One fourth Half Three fourth Equal to One fourth ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design 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. Shear Tensile Thermal Compressive Shear Tensile Thermal Compressive ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to 1 ∞ 2 20.8 1 ∞ 2 20.8 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Thin spherical shells subjected to internal pressure, develop __________ stresses. Circumferential Neither A nor B Both A & B Radial Circumferential Neither A nor B Both A & B Radial ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always Both B & C More than geometric mean value Less than arithmetic mean value More than arithmetic mean value Both B & C More than geometric mean value Less than arithmetic mean value More than arithmetic mean value ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by Di, opt = 3 Q0.36 ρ0.18 Di, opt = 3 Q0.36 . ρ1.86 μ0.08 Di, opt = 7.6 Q0.36 . ρ0.9 Di, opt = 3.9 Q0.45 . ρ0.23 Di, opt = 3 Q0.36 ρ0.18 Di, opt = 3 Q0.36 . ρ1.86 μ0.08 Di, opt = 7.6 Q0.36 . ρ0.9 Di, opt = 3.9 Q0.45 . ρ0.23 ANSWER DOWNLOAD EXAMIANS APP
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