Measurement of Viscosity MCQ Quiz - Objective Question with Answer for Measurement of Viscosity - Download Free PDF

Last updated on Apr 3, 2025

Latest Measurement of Viscosity MCQ Objective Questions

Measurement of Viscosity Question 1:

In a falling ball viscometer, the ball attains terminal velocities of 0.01 m/s for oil A and 0.002 m/s for oil B. Assuming the oils have the same density and oil A has kinematic viscosity of 5 × 10-3 m2/s, the kinematic viscosity of oil B in m2/s is

  1. 15 × 10-3
  2. 20 × 10-3
  3. 25 × 10-3
  4. 30 × 10-3

Answer (Detailed Solution Below)

Option 3 : 25 × 10-3

Measurement of Viscosity Question 1 Detailed Solution

In a falling ball viscometer,

Kinematic viscosity (V) is inversely proportional to terminal velocity (VT).

νA = 5 × 10-3 m2/s

vTA = 0.01 m/s

vTB = 0.002 m/s

νBνA=vTAvTB

νB=νA×vTAvTB

=5×103×0.010.002=25×103

Measurement of Viscosity Question 2:

A viscous damper consists of a sliding piston and a cylinder filled with oil of kinematic viscosity 5 × 10-5 m2/s. A damping force of 20 N is applied on the piston and the steady state velocity reached is 10 mm/s. The damping co-efficient of the damper is

  1. 2 Ns/mm
  2. 4 Ns/mm
  3. 10 Ns/mm
  4. 20 Ns/mm

Answer (Detailed Solution Below)

Option 1 : 2 Ns/mm

Measurement of Viscosity Question 2 Detailed Solution

Kinematic viscosity = 5 × 10-5 m2/s

Damping force = 20 N

Steady state velocity = 10 mm/s

Damping co-efficient of the damper is given by

D=ForceVelocity=20N10mm/s=2Ns/mm

Top Measurement of Viscosity MCQ Objective Questions

Measurement of Viscosity Question 3:

A viscous damper consists of a sliding piston and a cylinder filled with oil of kinematic viscosity 5 × 10-5 m2/s. A damping force of 20 N is applied on the piston and the steady state velocity reached is 10 mm/s. The damping co-efficient of the damper is

  1. 2 Ns/mm
  2. 4 Ns/mm
  3. 10 Ns/mm
  4. 20 Ns/mm

Answer (Detailed Solution Below)

Option 1 : 2 Ns/mm

Measurement of Viscosity Question 3 Detailed Solution

Kinematic viscosity = 5 × 10-5 m2/s

Damping force = 20 N

Steady state velocity = 10 mm/s

Damping co-efficient of the damper is given by

D=ForceVelocity=20N10mm/s=2Ns/mm

Measurement of Viscosity Question 4:

In a falling ball viscometer, the ball attains terminal velocities of 0.01 m/s for oil A and 0.002 m/s for oil B. Assuming the oils have the same density and oil A has kinematic viscosity of 5 × 10-3 m2/s, the kinematic viscosity of oil B in m2/s is

  1. 15 × 10-3
  2. 20 × 10-3
  3. 25 × 10-3
  4. 30 × 10-3

Answer (Detailed Solution Below)

Option 3 : 25 × 10-3

Measurement of Viscosity Question 4 Detailed Solution

In a falling ball viscometer,

Kinematic viscosity (V) is inversely proportional to terminal velocity (VT).

νA = 5 × 10-3 m2/s

vTA = 0.01 m/s

vTB = 0.002 m/s

νBνA=vTAvTB

νB=νA×vTAvTB

=5×103×0.010.002=25×103

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