| Bulk modulus for ideal fluids is |
A) Infinity
B) Unity
C) Zero
D) Any value less than one
| Surface tension of water |
A) increases with decrease in temperature
B) decreases with decrease in temperature
C) is independent
D) none of the above
| The Standard temperature for reporting specific gravity as per Indian Standard is |
A) 25°C
B) 30°C
C) 27°C
D) 11°C
| Fluids which do not follow the linear relationship between shear stress and rate of deformation are termed as _____ fluids. |
A) Newtonian
B) Non-Newtonian
C) Dilatant
D) Ideal
| The velocity gradient in the transverse direction for a fluid flows equals to |
A) The Pressure gradient
B) The rate of Shear strain
C) The stress at that point
D) The strain at that point
| Stoke is the unit of |
A) surface tension
B) viscosity
C) kinetic viscosity
D) dynamic viscosity
| Kinematic viscosity has the dimension as |
A) MLT-2
B) ML-1T2
C) ML-1T-1
D) L2T-1
| The unit of kinematic viscosity is |
A) gm/cm-sec2
B) dyne-sec/cm2
C) gm/cm2-sec
D) cm2/sec
| At 20°C temperature and standard pressure condition, kinematic viscosity of air would be approximately _____ times that of water |
A) 20
B) 8
C) 15
D) 12
| The dimensions of surface tension σ are |
A) ML–1
B) L2T–1
C) ML–1T–2
D) MT–2
| Surface tension is expressed in |
A) N/m
B) N/m2
C) N2/m
D) N/m3
| Hot wire anemometer is used for measuring which of the following parameter |
A) Turbulence
B) Pressure
C) Mean velocity
D) Discharge
| Cavitation is caused by |
A) impurities
B) environmental changes
C) high pressure
D) high vacuum
| Choose the best option for the Newtonian fluid |
A) Frictionless and incompressible
B) Viscosity is invariant with shear stress
C) Viscosity decreases at higher shear stress
D) Viscosity increases at higher shear stress
| Cavitation occurs in a pipe flow when |
A) the pressure becomes negative
B) the pressure is very high
C) the pressure is equal to vapour pressure
D) the fluid in the pipe is a gas
