DEBRIEFING – Cal’c 1, Cal’c 2 and Fluid Mechanics
I. DULONG FORMULA (Gross Calorific Value or HHV) 6. Perry’s Handbook, 8th Edition: Table 11-12, page 11-42
th
Perry’s 8 Ed, pg. 22-86 The higher the BWG rating of a tube, the lower is the
a) strength c) length of a tube section
b) area of flow d) grade of the metal used
7. Perry’s 8th Edition: Chapter 8, page 8-74
II. HEATING VALUE FORMULA (pg. 24-5)
Valve where direction of fluid flow does not change
A. HIGHER HEATING VALUE (HHV)
a) Gate b) Globe c) Ball d) Needle
8. Energy or Power input to the pump
B. LOWER HEATING VALUE (LHV) 9. Energy or Power output by the pump
10. BERNOULLI’S EQUATION
11. FLUID AND THERMO PROBLEMS (STEADY FLOW
CONDITIONS only) (Steam Table pg. 2-413 to 2-415)
During a steady flow process, the pressure of the working
substance drops from 200 to 20 psia, the speed increases
III. CLASSIFICATION OF COAL ( pg. 24-4)
from 200 to 1000 fps, the internal energy of the open
system decreases 25 BTU/lb and the specific volume
increases from 1 to 8 ft3/lbm. No heat is transferred.
a) Determine the power in hp for 10lbm/min.
ANS: Power = 3.1185 hp
b) Is the work done on or by the substance?
IV. UNIT OPERATIONS DRIVING FORCE ANS: Work is done by the substance
V. PROCESS VARIABLES
Which of the following is not a process variable?
a) level b) pressure c) flowrate d) density 12. EQUIVALENT DIAMETER
Calculate the Reynolds number of water at 20 0C flowing in
VI. FLUID MECHANICS BOARD QUESTIONS an open channel at 200 gal/s. The channel has a height of 4
1. Hydrostatic Principle feet and a width of 8 feet.
h1SG1 = h2SG2 a) 6 x 105 b) 8 x 105 c) 1 x 106 d) 1.2 x 106
2. CENTRIFUGATION
3. Transition length
a) LAMINAR (p.6-11 Perry’s 8th ed)
b) TURBULENT (p.6-11 Perry’s 8th ed)
4. FANNING FRICTION FACTOR
a) LAMINAR (pg. 6-10 Perry’s 8th edition)
b) Turbulent for smooth tubes (pg.6-10 Perry’s 8th ed)
c) Turbulent flow – rough pipes (p.6-11 Perry’s 8th ed)
5. A pump operating under specific conditions delivers
insufficient quantity of liquid. This may be set right by
a) decreasing the inlet pipe size
b) increasing the outlet pipe size
c) lower the height of the discharge tank
d) lower the pump position
, DEBRIEFING – Cal’c 1, Cal’c 2 and Fluid Mechanics
13. FLOWMETERS: ORIFICE 14. FLOWMETERS: ORIFICE
A sharp edged orifice meter is to be fabricated to measure An open cylindrical tank, 2.4 m in diameter and 6 m tall has
water flowing at a rate not to exceed 1200 cu. ft per hour, 1.5 m of glycerin (SG = 1.5), 2.5 m of water and 1.5 m of oil
with a differential head of 30 in Hg. What orifice diameter (SG = 0.82). Determine the discharge through the 125 mm
in inches is required if D2/D1 is made 1/5? diameter located at the bottom of the tank. Assume Cd =
a) 1 b) 1.5 c) 2 d) 2.5 0.65. ANS: Q= 0.0705 m3/s
I. DULONG FORMULA (Gross Calorific Value or HHV) 6. Perry’s Handbook, 8th Edition: Table 11-12, page 11-42
th
Perry’s 8 Ed, pg. 22-86 The higher the BWG rating of a tube, the lower is the
a) strength c) length of a tube section
b) area of flow d) grade of the metal used
7. Perry’s 8th Edition: Chapter 8, page 8-74
II. HEATING VALUE FORMULA (pg. 24-5)
Valve where direction of fluid flow does not change
A. HIGHER HEATING VALUE (HHV)
a) Gate b) Globe c) Ball d) Needle
8. Energy or Power input to the pump
B. LOWER HEATING VALUE (LHV) 9. Energy or Power output by the pump
10. BERNOULLI’S EQUATION
11. FLUID AND THERMO PROBLEMS (STEADY FLOW
CONDITIONS only) (Steam Table pg. 2-413 to 2-415)
During a steady flow process, the pressure of the working
substance drops from 200 to 20 psia, the speed increases
III. CLASSIFICATION OF COAL ( pg. 24-4)
from 200 to 1000 fps, the internal energy of the open
system decreases 25 BTU/lb and the specific volume
increases from 1 to 8 ft3/lbm. No heat is transferred.
a) Determine the power in hp for 10lbm/min.
ANS: Power = 3.1185 hp
b) Is the work done on or by the substance?
IV. UNIT OPERATIONS DRIVING FORCE ANS: Work is done by the substance
V. PROCESS VARIABLES
Which of the following is not a process variable?
a) level b) pressure c) flowrate d) density 12. EQUIVALENT DIAMETER
Calculate the Reynolds number of water at 20 0C flowing in
VI. FLUID MECHANICS BOARD QUESTIONS an open channel at 200 gal/s. The channel has a height of 4
1. Hydrostatic Principle feet and a width of 8 feet.
h1SG1 = h2SG2 a) 6 x 105 b) 8 x 105 c) 1 x 106 d) 1.2 x 106
2. CENTRIFUGATION
3. Transition length
a) LAMINAR (p.6-11 Perry’s 8th ed)
b) TURBULENT (p.6-11 Perry’s 8th ed)
4. FANNING FRICTION FACTOR
a) LAMINAR (pg. 6-10 Perry’s 8th edition)
b) Turbulent for smooth tubes (pg.6-10 Perry’s 8th ed)
c) Turbulent flow – rough pipes (p.6-11 Perry’s 8th ed)
5. A pump operating under specific conditions delivers
insufficient quantity of liquid. This may be set right by
a) decreasing the inlet pipe size
b) increasing the outlet pipe size
c) lower the height of the discharge tank
d) lower the pump position
, DEBRIEFING – Cal’c 1, Cal’c 2 and Fluid Mechanics
13. FLOWMETERS: ORIFICE 14. FLOWMETERS: ORIFICE
A sharp edged orifice meter is to be fabricated to measure An open cylindrical tank, 2.4 m in diameter and 6 m tall has
water flowing at a rate not to exceed 1200 cu. ft per hour, 1.5 m of glycerin (SG = 1.5), 2.5 m of water and 1.5 m of oil
with a differential head of 30 in Hg. What orifice diameter (SG = 0.82). Determine the discharge through the 125 mm
in inches is required if D2/D1 is made 1/5? diameter located at the bottom of the tank. Assume Cd =
a) 1 b) 1.5 c) 2 d) 2.5 0.65. ANS: Q= 0.0705 m3/s
