Fluid Mechanics Test 1

Which one of the following is the unit of mass density?

• a) kg/m³

• b) kg = m²

• c) kg = m

• d) kg = ms

The specific gravity of a liquid has

• a) the same unit as that of mass density

• b) the same unit as that of weight density

• c) the same unit as that of specific volume

• d) no unit

The specific volume of a liquid is the reciprocal of

• a) weight density

• b) mass density

• c) specific weight

• d) specific volume

Which one of the following is the unit of specific weight?

• a) N/m³

• b) N/m²

• c) N/m

• d) N/ms

A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific weight of the liquid will be

• a) 6.5 kN/m³

• b) 6.6 kN/m³

• c) 6.7 kN/m³

• d) 6.8 kN/m³

A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific gravity of the liquid will be

• a) 0.65

• b) 0.66

• c) 0.67

• d) 0.68

A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific volume of the liquid will be

• a) 1 lit/kg

• b) 1.5 lit/kg

• c) 2 lit/kg

• d) 2.5 lit/kg

Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature?

• a) Viscosity increases with the increase in temperature of a liquid and decreases with the increase in temperature of a gas

• b) Viscosity increases with the increase in temperature of a liquid and increases with the increase in temperature of a gas

• c) Viscosity decreases with the increase in temperature of a liquid and decreases with the increase in temperature of a gas

• d) Viscosity decreases with the increase in temperature of a liquid and increases with the increase in temperature of a ga

Which one of the following is not a unit of dynamic viscosity?

• a) Pa-s

• b) N-s/m2

• c) Poise

• d) Stokes

Which one of the following is the CGS unit of dynamic viscosity?

• a) Stokes

• b) Pa-s

• c) m²/s

• d) Poise