FM Lab-Redwood Viscometer Quiz

What is the aim of the experiment using the Redwood Viscometer?

• To analyze the chemical composition of oil

• To determine the kinematic viscosity and absolute viscosity of lubricating oil

• To measure the temperature of the oil

• To measure the density of oil

Which equation is applicable for the flow through the orifice in a Redwood Viscometer?

• Hagen–Poiseuille’s equation

• Bernoulli's equation

• Navier-Stokes equation

• Continuity equation

What is the dynamic viscosity of water at 20°C?

• 1.5 mm²/s

• 1.002 × 10⁻³ N·s/m²

• 1.0038 mm²/s

• 0.89 N·s/m²

What type of flow conditions are viscosity measurements valid under?

• None of the above

• Turbulent flow conditions

• Laminar flow conditions

• Transitional flow conditions

What is the diameter of the orifice in the Redwood Viscometer?

• 2.5 mm

• 2.0 mm

• 1.7 mm

• 1.5 mm

What is the formula for calculating kinematic viscosity in the experiment?

• ν = C₁ + C₂·t

• ν = C₁·t² - C₂

• ν = C₁·t - C₂ / t

• ν = C₁·t + C₂ / t

What is the purpose of the water bath in the Redwood Viscometer setup?

• To cool the oil

• To maintain a constant temperature

• To increase the pressure

• To mix the oil

Which of the following is NOT a type of viscometer mentioned?

• Magnetic viscometer

• Rotational viscometer

• Falling sphere viscometer

• Bubble viscometer

What is the role of the stopwatch in the experiment?

• To measure the temperature

• To record the time for oil collection

• To measure the pressure

• To control the water bath

What happens to the viscosity of lubricating oil as temperature increases?

• It increases

• It remains constant

• It fluctuates

• It decreases