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25 Cards in this Set
- Front
- Back
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1) Potential energy is most nearly associated with ---
(A) speed (B) motion (C) ability (D) electricity |
(C) ability
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2) The accomplishment of a force acting through a distance is associated with ---
(A) power (B) potential energy (C) horsepower (D) work |
(D) work
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3) Energy available for future use is called ---
(A) kinetic (B) electrical (C) potential (D) inertia |
(C) potential
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4) The term power means ---
(A) energy (B) voltage (C) rate at which work is done (D) rate of change of momentum |
(C) rate at which work is done
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5) Falling water contains ---
(A) potential energy (B) mechanical energy (C) kinetic energy (D) electrical energy |
(C) kinetic energy
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6) The acceleration of a freely falling body due to the force of gravity is ---
(A) 32 ft/second (B) 32 ft per second per second (32 ft/second squared) (C) 16 ft/second (D) 64 ft/second |
(B) 32 ft per second per second (32 ft/second squared)
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7) A foot pound is a unit of ---
(A) force (B) power (C) work (D) momentum |
(C) work
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8) In five seconds of fall, a falling body will have a velocity of how many feet per second?
(A) 25 ft (B) 32 ft (C) 80 ft (D) 160 ft |
(D) 160 ft
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9) The theoretical velocity of a freely falling body is equal to ---
(A) the square root of h/2g (B) h2g (C) the square root of 1/2 gh (D) the square root of 2gh |
(D) the square root of 2gh
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10) If the velocity of a stream of water is doubled, the weight of the material it can suspend and carry is increased by --
(A) 2 (B) 4 (C) 8 (D) 16 |
(D) 16
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11) A pump raises 200 cubic feet of water to a height of 50 feet. How much work was done to raise this water?
(A) 249.6 ft-lbs (B) 4330 ft-lbs (C) 10,000 ft-lbs (D) 624,000 ft-lbs |
(D) 624,000 ft-lbs
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12) If the water in question 11 is raised in five minutes, at what rate in horsepower is the work done?
(A) 1-3/4 (B) 2-3/4 (C) 3-3/4 (D) 4-3/4 |
(C) 3-3/4
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13) Niagara Falls is 160 feet high. At the top of the falls each cubic foot of water (weright 62.4 lbs) has how many
foot-pounds of potential energy? (A) 62.4 (B) 160 (C) 9984 (D) more than 10,000 |
(C) 9984
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14) The transfer of kinetic energy contained in falling water to mechanical energy at the blades of a hydraulic turbine involves the application of ---
(A) the first law of motion (B) the second law of motion (C) the third law of motion (D) all three laws |
(D) all three laws
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15) Increasing the velocity of falling water will ---
(A) decrease the available kinetic energy (B) increase the available kinetic energy (C) have no effect on the available kinetic energy (D) increase both kinetic and potential energy |
(B) increase the available kinetic energy
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16) Disregarding all other losses, rate of flow of a liquid is the product of ---
(A) area x velocity (B) diameter x velocity (C) velocity x time (D) area x velocity x distance |
(A) area x velocity
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17) When used for flow measurement, the distinguishing difference between a venturi tube and a sharp-edged orifice plate is ---
(A) the orifice plate gives low differential pressure (B) the orifice plate is 100 percent efficient (C) in the value of the coefficient (D) no difference |
(C) in the value of the coefficient
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18) With continuous steady flow, the total head at any point in a stream is equal to the total head at any downstream point plus the ---
(A) turbulance losses (B) frictional losses (C) loss of head between to the two points (D) velocity |
(C) loss of head between to the two points
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19) The sudden transformation within a pipe of the kinetic energy of the moving mass of water into pressure energy is most usually associated with ---
(A) flow measurement (B) effective head measurement (C) water hammer (D) converting kinetic energy to mechanical energy |
(C) water hammer
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20) The damaging effect of water hammer can be controlled by ---
(A) proper valve control (B) venting (C) priming (D) effective application of all three of the above |
(D) effective application of all three of the above
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21) Compute the approximate friction loss in feet of head for a section of pipe having a diameter of 2 feet, 1000 feet long, roughness coefficient of 0.02 and a mean velocity of 10 ft/second.
(A) 5 (B) 10 (C) 15 (D) 20 |
(C) 15
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22) Compute the approximate loss of head in feet due to the turbulance for the pipe in question 21, assuming a square edge entry.
(A) 1/2 (B) 3/4 (C) 1 (D) more than 1 |
(B) 3/4
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23) The head causing the flow through a pipe is the difference between the total head at the beginning of the pipe and the ---
(A) frictional losses (B) turbulance losses (C) atmospheric pressure (D) total heat at the end of the pipe |
(D) total heat at the end of the pipe
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24) Two reservoirs have surface elevations of 200 and 100 feet. Calculate the approximate flow rate in gals/min through the inter-connecting pipe. Assume a square edge entry, clean steel pipe, diameter 1-1/2 feet, length 600 feet, and a coefficient "f" of 0.02.
(A) less than 20,000 (B) between 20,000 and 21,000 (C) between 21,000 and 22,000 (D) greater than 22,000 |
(B) between 20,000 and 21,000
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25) When applied to a moving liquid mass, the expression v squared/2g refers to ---
(A) velocity head (B) pressure head (C) static head (D) all of the above |
(A) velocity head
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