I. (20%) Circle one answer for each of the 10 questions below. A fluid is a subs

Question

I. (20%) Circle one answer for each of the 10 questions below. A fluid is a substance that Read Chapter 1 (A)expands until it fills its space (B) is essentially incompressible. (C) always moves when subjected to a shear stress. (D)has a viscosity that always increases with temperature (E) has a viscosity that always decreases with temperature. What is the absolute pressure in the tire having a gauge pressure of 20 psi in standard atmosphere? (A) 20 psia (B) 14.7 psia (C) 34.7 psia (D)5.3 psia (E) cannot be determined. Read Chapter 2 A Newtonian fluid is a fluid in which (A)the flow follows the Newton's law of motion. (B) the shear stress is negligible. (C) the shear stress is greater than the pressure. (D)the shear stress is a function of shearing strain. (E) the shear stress is linearly proportional to the rate of shearing strain. If an air bubble rises from a depth of 10 m of salt water to the sea surface, the volume becomes (A) doubled (B) tripled (C) halved (D)one third of its original volume (E) the same In parallel pipelines, Read Section 8.5.2 (A)the length in each branch is the same. (B) the flow rate in each branch is the same. (C) the head loss in each branch is the same. (D)the pipe diameter in each branch is the same. (E) the total head loss is the sum of the head losses in all branches.

Explanation / Answer

1) option c,, a fluid is a substance that flows when subjected to shear stress.

2) option c,, as absolute pressure = guage+ atmospheric pressure=? Pabsolute= 20+14.7=34.7psi

3) option E) since by definition of newtonian fluid

4) option a)) the volume will be doubled because pressure exerted will get decreased when bubble rises in water

5) option c)) the head loss will be same at any point

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