Operation of McLeod gauge used for low pressure measurement is based on the principle of_____________________?
(A) gas law
(B) Boyle’s law
(C) Charle’s law
(D) Pascal’s law
(D) McLeod’s law
Pressure of the order of 10″‘ torr can be measured by_______________ ?
(A) Bourdon tube
(B) Pirani Gauge
(C) micro-manometer
(D) ionisastion gauge
(D) McLeod gauge
Newton’s law of viscosity is a relationship between________________?
(A) shear stress anctthejiate of angular distortion
(B) shear stress and viscosity
(C) shear stress, velocity and viscosity
(D) pressure, velocity and viscosity
(D) shear stress, pressure and rate of angular distortion
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of_________________?
(A) 1
(B) 1.2
(C) 0.8
(D) 0.75
(D) 1.25
The atmospheric pressure with rise in altitude decreases____________________?
(A) linearly
(B) first slowly and then steeply
(C) first steeply and then gradually
(D) unpredictable
(D) none of the above
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_______________?
(A) force of adhesion
(B) force of cohesion
(C) force of friction
(D) force of diffusion
(D) none of die above
Surface energy per unit area of a surface is numerically equal to___________________?
(A) atmospheric pressure
(B) surface tension
(C) force of adhesion
(D) force of cohesion
(D) viscosity
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately____________________?
(A) 1 mm
(B) 5 mm
(C) 10 mm
(D) 20 mm
(D) 30 mm
The difference of pressure between the inside and outside of a liquid drop is________________?
(A) p = Txr
(B) p = T/r
(C) p = T/2r
(D) p = 2T/r
(D) none of the above
Euler’s dimensionless number relates the following_______________?
(A) inertial force and gravity
(B) viscous force and inertial force
(C) viscous force and buoyancy force
(D) pressure force and inertial force
(D) pressure force and viscous force