Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than ______________ kilolitres?

A. 5.5
B. 12.5
C. 30.5
D. 45.5

A. 1000
B. 3000
C. 5000
D. 10000

A. η = 17 – 61.1 log μ
B. η = 24.6 (Δp/μ)
C. η = 1.66 – 0.25 log μ
D. η = 0.25 log μ – 1.67

A. Low viscosity liquids (< 200 poise)
B. High viscosity liquids (> 600 poise)
C. Large diameter tanks
D. None of these

A. Pressure drop across the cake & filter medium
B. Cake & filter medium resistance
C. Area of filtering surface & the viscosity of filtrate
D. All A., B. and C.

A. Relieving excess pressure
B. Creating turbulence
C. Enhancing mixing rate
D. Avoiding vortex formation