## 66. For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter)

## 67. For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (N_{p}) varies with N_{Re} as

_{p}) varies with N

_{Re}as

## 68. The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)

## 69. Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

## 70. Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

## Read More Section(Mechanical Operations)

Each Section contains maximum **70 questions**. To get more questions visit other sections.