Process Equipment and Plant Design
For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft³/sec.ρ = fluid density, lb/ft³ μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)

Di, opt = 3 Q0.36 . μ0.88
Di, opt = 4.7 Q0.36 . μ3.2ρ0.13
Di, opt = 3.9 Q0.45 ρ0.13
Di, opt = 3.9 Q0.45 . μ0.95

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
In case of design of a shell and tube heat exchanger,

Minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto 15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than tube diameter
Minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch
O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres
All of these

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
Generally, elliptical dished heads

All of these
Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D
Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter
Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Process Equipment and Plant Design