InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A fluid is undergoing steady flow. Therefore: A. the velocity of any given molecule of fluid does not change B. the pressure does not vary from point to point C. the velocity at any given point does not vary with time D. the density does not vary from point to point E. the flow is not uphill or downhill |
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Answer» C. the velocity at any given point does not vary with time |
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| 2. |
Water is pumped through the hose shown below, from a lower level to an upper level. Compared to the water at point 1, the water at point 2A. has greater speed and greater pressure B. has greater speed and less pressure C. has less speed and less pressure D. has less speed and greater pressure E. has greater speed and the same pressure |
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Answer» B. has greater speed and less pressure |
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| 3. |
A non-viscous incompressible liquid is flowing through a horizontal pipe of constant cross section. Bernoulli’s equation and the equation of continuity predict that the drop in pressure along the pipe: A. is zero B. depends on the length of the pipe C. depends on the fluid velocity D. depends on the cross-sectional area of the pipe E. depends on the height of the pipe |
| Answer» A . is zero | |
| 4. |
Barometers and open-tube manometers are two instruments that are used to measure pressure. A. Both measure gauge pressure B. Both measure absolute pressure C. Barometers measure gauge pressure and manometers measure absolute pressure D. Barometers measure absolute pressure and manometers measure gauge pressure E. Both measure an average of the absolute and gauge pressures |
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Answer» D. Barometers measure absolute pressure and manometers measure gauge pressure |
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| 5. |
Which of the following statements about Pascal’s principle is true? A. It is valid only for incompressible fluids B. It explains why light objects float C. It explains why the pressure is greater at the bottom of a lake than at the surface D. It is valid only for objects that are less dense than water E. None of the above are true |
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Answer» E. None of the above are true |
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| 6. |
The hydraulic automobile jack illustrates: A. Archimedes’ principle B. Pascal’s principle C. Hooke’s law D. Newton’s third law E. Newton’s second law |
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Answer» B. Pascal’s principle |
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| 7. |
Consider a pipe containing a fluid, with the fluid being at rest. To apply Bernoulli’s equation to this situation: A. set v equal to zero because there is no motion B. set g equal to zero because there is no acceleration C. set v and g both equal to zero D. set p equal to the atmospheric pressure E. cannot be done, Bernoulli’s equation applies only to fluids in motion |
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Answer» A. set v equal to zero because there is no motion |
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| 8. |
A blast of wind tips a sailboat in the clockwise direction when viewed from the stern. When the wind ceases the boat rotates back toward the upright position if, when it is tilted, the center of buoyancy: A. is above the center of gravity B. is below the center of gravity C. is to the right of the center of gravity D. is to the left of the center of gravity E. coincides with the center of gravity |
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Answer» C. is to the right of the center of gravity |
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| 9. |
A bucket of water is pushed from left to right with increasing speed across a horizontal surface. Consider the pressure at two points at the same level in the water. A. It is the same B. It is higher at the point on the leftC. It is higher at the point on the right D. At first it is higher at the point on the left but as the bucket speeds up it is lower there E. At first it is higher at the point on the right but as the bucket speeds up it is lower there |
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Answer» B. It is higher at the point on the left |
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| 10. |
Which of the following five statements, concerning the upper surface pressure of a liquid, is FALSE? A. It is independent of the surface area B. It is the same for all points on that surface C. It would not increase if the liquid depth were increased D. It would increase if the liquid density were increased E. It would increase if the atmospheric pressure increased |
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Answer» D. It would increase if the liquid density were increased |
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| 11. |
In a stationary homogeneous liquid: A. pressure is the same at all points B. pressure depends on the direction C. pressure is independent of any atmospheric pressure on the upper surface of the liquid D. pressure is the same at all points at the same level E. none of the above |
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Answer» D. pressure is the same at all points at the same level |
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| 12. |
To obtain the absolute pressure from the gauge pressure: A. subtract atmospheric pressure B. add atmospheric pressure C. subtract 273 D. add 273 E. convert to N/m2 |
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Answer» B. add atmospheric pressure |
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| 13. |
The pressure exerted on the ground by a man is greatest when: A. he stands with both feet flat on the ground B. he stands flat on one foot C. he stands on the toes of one foot D. he lies down on the ground E. all of the above yield the same pressure |
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Answer» C. he stands on the toes of one foot |
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| 14. |
Two balls have the same shape and size but one is denser than the other. If frictional forces are negligible when they are dropped in air, which has the greater acceleration? A. The heavier ball B. The lighter ball C. They have the same acceleration D. The heavier ball if atmospheric pressure is high, they lighter ball if it is low E. The lighter ball if atmospheric pressure is high, the heavier ball if it is low |
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Answer» A. The heavier ball |
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| 15. |
The principle of fluid pressure that is used in hydraulic brakes or lifts is that: A. pressure is the same at all levels in a fluid B. increases of pressure are transmitted equally to all parts of a fluid C. the pressure at a point in a fluid is due to the weight of the fluid above it D. increases of pressure can only be transmitted through fluids E. the pressure at a given depth is proportional to the depth in the fluid |
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Answer» B. increases of pressure are transmitted equally to all parts of a fluid |
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| 16. |
A student standardizes the concentration of a saltwater solution by slowly adding salt until an egg will just float. The procedure is based on the assumption that: A. all eggs have the same volume B. all eggs have the same weight C. all eggs have the same density D. all eggs have the same shape E. the salt tends to neutralize the cholesterol in the egg |
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Answer» C. all eggs have the same density |
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| 17. |
A steel ax and an aluminum piston have the same apparent weight in water. When they are weighed in air: A. they weigh the same B. the ax is heavier C. the piston is heavier D. both weigh less than they did in water E. depends on their shapes |
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Answer» C. the piston is heavier |
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| 18. |
A person blows across the top of one arm of a U-tube partially filled with water. The water in that arm: A. rises slightly B. drops slightly C. remains at the same height D. rises if the blowing is soft but drops if it is hard E. rises if the blowing is hard but drops if it is soft |
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Answer» A. rises slightly |
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| 19. |
A water line enters a house 2.0 m below ground. A smaller diameter pipe carries water to a faucet 5.0 m above ground, on the second floor. Water flows at 2.0 m/s in the main line and at 7.0 m/s on the second floor. Take the density of water to be 1.0 × 103 kg/m3 . The difference in pressure between the main line and the second floor is: A. 7.15 × 104 Pa with the main line at the higher pressure B. 2.65 × 104 Pa with the main line at the higher pressure C. 7.15 × 104 Pa with the main line at the lower pressure D. 2.65 × 104 Pa with the main line at the lower pressure E. 9.4 × 104 Pa with the main line at the higher pressure |
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Answer» A. 7.15 × 104 Pa with the main line at the higher pressure |
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| 20. |
The apparent weight of a steel sphere immersed in various liquids is measured using a spring scale. The greatest reading is obtained for that liquid: A. having the smallest density B. having the largest density C. subject to the greatest atmospheric pressure D. having the greatest volume E. in which the sphere was submerged deepest |
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Answer» A. having the smallest density |
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| 21. |
A pirate chest rests at the bottom of an ocean. If the water is still, the net force it exerts on the chest: A. is upward B. is downward C. is zero D. depends on the mass of the chest E. depends on the contents of the chest |
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Answer» B. is downward |
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| 22. |
A small steel ball floats in a half-full container of mercury. When water is added: A. the ball will float on the water B. the ball will rise slightly C. the mercury will float on the water D. the ball will sink to the bottom of the container E. the ball will lower slightly more into the mercury |
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Answer» B. the ball will rise slightly |
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| 23. |
pressure. The container is then sealed and the air above the liquid is evacuated. The cork: A. sinks slightly B. rises slightly C. floats at the same height D. bobs up and down about its old position E. behaves erratically |
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Answer» C. floats at the same height |
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| 24. |
A loaded ship passes from a lake (fresh water) to the ocean (saltwater). Saltwater is more dense than fresh water and as a result the ship will: A. ride higher in the water B. settle lower in the water C. ride at the same level in the water D. experience an increase in buoyant forceE. experience a decrease in buoyant force |
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Answer» A. ride higher in the water |
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| 25. |
The quantity y appearing in Bernoulli’s equation MUST be measured: A. upward from the center of Earth B. upward from the surface of Earth C. upward from the lowest point in the flow D. downward from the highest point in the flow E. upward from any convenient level |
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Answer» E. upward from any convenient level |
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