Fluid Mechanics
Questions and Answers
Question 1
A sealed cylinder of a volume of 20 liters contains highly compressed oil at a pressure of 1000
t/m2. Under atmospheric conditions, the oil has a specific gravity of 0.8. Find the mass of the
compressed oil. (Compressibility coefficient = 200,000 t/m2)
Solution
P 1000
0.005
K 200000
0.8 *1000 *1.005 804 kgM m3
compressed
M V 20
) 16.08kg M
compressed oil 804(
compressed compressed
1000
Question 2
State if the following statements are true (√) or false ( X )
1. A fluid is a substance, which deforms continuously when subjected to any shear stress
2. If 1 = 1000 Pa, 2 = 10 Kg/cm2, then 1 < 2
3. A solid cylinder of S.G. = 3.2 will float on top of mercury
4. Liquids are less compressible than gases
5. At sunrise of a sunny day, the temperature of sand on a beach is higher than that of the
seaw a t e r while at 2 hours before sunset the opposite is true.
6. If two identical jars, one filled with water and one filled with olive oil, are heated in the same
oven for 2 minutes (same heat energy is absorbed by both), the water temperature will be
higher than the oil temperature ( for T < 100 ºC)
7. Two air bubbles exist at the same level below the seawater surface. Bubble A has a diameter
Questions and Answers
Question 1
A sealed cylinder of a volume of 20 liters contains highly compressed oil at a pressure of 1000
t/m2. Under atmospheric conditions, the oil has a specific gravity of 0.8. Find the mass of the
compressed oil. (Compressibility coefficient = 200,000 t/m2)
Solution
P 1000
0.005
K 200000
0.8 *1000 *1.005 804 kgM m3
compressed
M V 20
) 16.08kg M
compressed oil 804(
compressed compressed
1000
Question 2
State if the following statements are true (√) or false ( X )
1. A fluid is a substance, which deforms continuously when subjected to any shear stress
2. If 1 = 1000 Pa, 2 = 10 Kg/cm2, then 1 < 2
3. A solid cylinder of S.G. = 3.2 will float on top of mercury
4. Liquids are less compressible than gases
5. At sunrise of a sunny day, the temperature of sand on a beach is higher than that of the
seaw a t e r while at 2 hours before sunset the opposite is true.
6. If two identical jars, one filled with water and one filled with olive oil, are heated in the same
oven for 2 minutes (same heat energy is absorbed by both), the water temperature will be
higher than the oil temperature ( for T < 100 ºC)
7. Two air bubbles exist at the same level below the seawater surface. Bubble A has a diameter
