1. Example of positive displacement meter is _____________
a) Variable area flow meter
b) Turbine meters
c) Rotary piston meter
d) Venturi
Discussion
Explanation: A positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement. Rotary piston meter is a positive displacement meter
2. Turbine meters are generally preferred for?
a) Low-viscosity and high flow measurements
b) High viscosity and low flow measurements
c) High viscosity and high flow measurements
d) Low viscosity and low flow measurements
Discussion
Explanation: Turbine flow meters are used for the measurement of natural gas and liquid flow. Turbine meters are used for low-viscosity and high flow measurements.
3. The flow meter which is replacing the differential pressure meters in its applications is _____________
a) Vortex-shedding flow meter
b) Electromagnetic flow meters
c) Ultrasonic flow meters
d) Displacemement meter
Discussion
Explanation: A vortex flow meter is a flow measurement device best suited for flow measurements where the introduction of moving parts presents problems. Vortex-shedding flow meter took place of differential pressure meters in its applications.
4. Ostwald, Herschel-Bulkley, Steiger-Ory, Bingham, Ellis and Eyring. The following models are to study the flow behavior of?
a) Newtonian fluid
b) Non-Newtonian fluid
c) Dilated fluid
d) Ideal fluid
Discussion
Explanation: Several models are available for mathematical description of the flow behavior of non-Newtonian systems. Examples of such models are Ostwald, Herschel-Bulkley, Steiger-Ory, Bingham, Ellis and Eyring.
5. Which of the following satisfy n=1 (where n is flow behavior index)?
a) Pseudoplastic fluid
b) Thixotropic fluid
c) Newtonian fluid
d) Diliant fluid
Discussion
Explanation: The n=1 for Newtonian fluids. Newtonian fluid is a fluid in which the viscous stresses arising from its flow, at every point. The stress is linearly proportional to the local strain rate—the rate of change of its deformation over time.
6. Which of the following satisfy n<1 (where n is flow behavior index)?
a) Pseudoplastic fluid
b) Thixotropic fluid
c) Newtonian fluid
d) Diliant fluid
Discussion
Explanation: The n<1 for shear thinning (pseudoplastic) fluids. Shear thinning is the non-Newtonian behavior of fluids whose viscosity decreases under shear strain. It is sometimes considered synonymous for pseudo plastic behavior
7. Which of the following satisfy n>1 (where n is flow behavior index)?
a) Pseudoplastic fluid
b) Thixotropic fluid
c) Newtonian fluid
d) Diliant fluid
Discussion
Explanation: The n>1 for shear thickening (diliants) fluids. Dilatant fluids, also known as shear thickening fluids, are liquids or solutions whose viscosity increases as stress is applied.
8. Herschel-Bulkley model is also called as ______
a) Low equation
b) Young’s equation
c) Power law equation
d) Rutherford equation
Discussion
Explanation: Herschel-Bulkley model, also called the generalized power law equation which in principle is an extended Ostwald mode
9. Milk secreted in the udder is virtually sterile.
a) True
b) False
Discussion
Explanation: When milk is secreted in the udder it is virtually sterile. Milk, even before it leaves the udder it is infected by bacteria which enter through the teat channel.
10. Which of the following is not a source of infection in milk?
a) Milker and cow
b) Litter
c) Ambient air
d) Heat
Discussion
Explanation: When cows are milked by hand, bacteria can get into the milk via the milker, the cow, the litter and the ambient air. Hence, milker and cow are primary source of infection.