## What is the formula of viscosity index?

Viscosity Index Calculator Y = kinematic viscosity at 100 °C of the petroleum product whose viscosity index needs to be calculated, mm2 /s. H = kinematic viscosity of an oil at 40 °C of 100 viscosity index having the same kinematic viscosity at 100 °C as the oil whose viscosity index needs to be calculated, mm2 /s.

### What is the principle of Red Wood viscometer?

Redwood Viscometer is used for the determination of redwood viscosity and which can be converted to Kinematic viscosity also. It is also used for observing the effect of temperature on viscosity by plotting graph. Type Of Bath : Electrically Heated Immerssion Heater.

#### What is the efflux of the Red Wood viscometer no2?

What is the efflux of the redwood viscometer no2? Explanation: The efflux of the redwood viscometer no2 is 200 seconds or less. Its jet for the outflow of the oil is having larger diameter.

What is Redwood viscosity?

Viscosity is a measure of fuel resistance to flow. When expressed in seconds Redwood at 100 degrees Fahrenheit, it is the time it takes for a fixed amount of fuel to pass through an orifice of fixed size at 100 degrees Fahrenheit.

How will you determine the viscosity of lubricating oil using redwood viscometer differentiate between Redwood viscometer No 1 & 2?

The jet orifice of redwood viscometer 2 has an internal diameter of 3.8 mm and length of 15mm. It is used to determine the viscosity of less viscous oils having flow (efflux) time less than 2000 second. It is used to determine the viscosity of viscous oils having flow (efflux) time more than 2000 seconds.

## What is the difference between viscosity and viscosity index?

Viscosity is a property which tends to decrease as the temperature increases. Viscosity index indicate the resistance of an oil to the changes in viscosity with temperature. smaller the change in viscosity with temperature, higher is the viscosity index of the oil.

### How is oil viscosity calculated?

To measure absolute viscosity, insert a metal rod into the same two beakers. Use the rod to stir the oil, and then measure the force required to stir each oil at the same rate. The force required to stir the gear oil will be greater than the force required to stir the turbine oil.

#### What is the difference between Redwood viscometer No 1 and no2?

No. 1 Determines viscosity of oils not exceeding 2000 seconds at the test temperature. No. 2 Determines viscosity of oils exceeding 2000 seconds at the test temperature.

What is difference in Redwood viscometer No 1 and No 2?