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Fluid Mechanics Practice Questions with Solutions, Exams of Engineering

Abilene Christian University (ACU)Engineering

A series of practice questions related to fluid mechanics, covering topics such as pressure, density, specific gravity, and mechanical advantage. Each question is accompanied by a multiple-choice answer, making it a useful resource for students studying physics or engineering. The questions range in difficulty and cover a variety of concepts, providing a comprehensive review of the subject matter. This resource is designed to help students test their understanding and prepare for exams or quizzes. It includes problems related to hydraulic systems, fluid flow, and material properties, offering a broad overview of fluid mechanics principles. Suitable for high school and university students alike, providing a solid foundation in the fundamental concepts of fluid mechanics.

Typology: Exams

2024/2025

Available from 08/06/2025

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3A1 Chapter 7 Practice Questions with 100% complete solutions
rated A+
1 /
13
1. A. Normal or
prependicular
In a fluid contained by solid boundaries the
pressure ex- erted by the enclosed fluid on its
boundaries is always:
A. Normal or prependicular
B. Constant in all directions
C. Equal
D.Measured in kgs
E. Acting on the side and bottoms
2. C. 35.6 cm A block of wood measures 20 cm wide x 15 cm
deep and has a specific gravity of 0.75. If its mass
is 8 kg, find the length of the block.
A. 3.56 cm
B. 13.56 cm
C. 35.6 cm
D.105 mm
E. 10,667 cm
3. D. 9 The wheel-and-axle system below has
dimensions d = 300 mm and R = 1.5 m. If the
efficiency of the machine is 90%, find the
mechanical advantage of the system.
A. 4.5
B. 5
C. 7
D.9
E. 10
4. A. A substance compared to the density of water
pf3
pf4
pf5
pf8
pf9
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Partial preview of the text

Download Fluid Mechanics Practice Questions with Solutions and more Exams Engineering in PDF only on Docsity!

rated A+ 1 /

  1. A. Normal or prependicular In a fluid contained by solid boundaries the pressure ex- erted by the enclosed fluid on its boundaries is always: A. Normal or prependicular B. Constant in all directions C. Equal D.Measured in kgs E. Acting on the side and bottoms
  2. C. 35.6 cm A block of wood measures 20 cm wide x 15 cm deep and has a specific gravity of 0.75. If its mass is 8 kg, find the length of the block. A. 3.56 cm B. 13.56 cm C. 35.6 cm D. 105 mm E. 10,667 cm
  3. D. 9 The wheel-and-axle system below has dimensions d = 300 mm and R = 1.5 m. If the efficiency of the machine is 90%, find the mechanical advantage of the system. A. 4. B. 5 C. 7 D. 9 E. 10
  4. A. A substance compared to the density of water

rated A+ 2 / The "relative density" of a substance refers to the density of:

rated A+ 4 / A. 4,000 Pa B. 11 kPa C. 24.3 kPa

rated A+ 5 / D.39.24 kPa E. 140.54 kPa

  1. E. 3 A force acting at one end of a 4 m lever is 3 m from the fulcrum. This force keeps a mass of 50 kg on the other end of the lever in equilibrium. The mechanical advantage of this system is A. 7 B. 6 C. 5 D. 4 E. 3
  2. A. 1.21 m/s A pipe has an inside diameter of 4 cm with an oil flow of 5,000 kg/hr. The relative density of the oil is 0.9. What is the velocity of the oil? A. 1.21 m/s B. 2.45 m/s C. 3.66 m/s D.4.84 m/s E. 6.05 m/s
  3. A. 16.30 kg A rope block hangs from a beam. The rope is pass- ing around two sheaves (sheave = wheel or disk with a grooved rim, especially one used as a pulley) in each block as illustrated below. Find the mass that can be lifted with an effort of 40 N. A. 16.30 kg B. 20.39 kg C. 24.46 kg D.30.58 kg E. 160 kg

rated A+ 7 /

  1. D. 0.49 m/s A pipe has an inside diameter of 4 cm with an water flow of 5,000 L/hr. The pipe diameter increases to 6 cm. What is the velocity of the water in the larger section? A. 1.01 m/s B. 0.45 m/s C. 0.66 m/s D.0.49 m/s E. 0.58 m/s
  2. C. 61.31 N A wheel and axle has a wheel of 60 cm diameter, and an axle of 7.5 cm diameter. Calculate the effort required to raise a mass of 50 kg. A. 4.5 N B. 12.26 N C. 61.31 N D. 1226 N E. 3924 N
  3. B. 1.2 tonnes The screw below has a pitch of a screw thread of 10 mm ("two start" thread). The handle is 300 mm long. An effort of 250 N is applied to the handle. If the efficiency of the jack due to the friction within the lifting threads is 50%, how many tonnes can it lift? A. 1 tonne B. 1.2 tonnes C. 2.4 tonnes D.3.6 tonnes E. 2.8 tonnes

rated A+ 8 /

  1. C. 35.64 kN The figure below shows a hydraulic jack system used for hoisting cars. Assuming the pressure of the air is equal to the pressure on the piston, the piston diameter of 27.5 cm, and the pressure value of 600 kPa that compressor can generate, what is the maximum load (in Newtons) the piston can raise? A. 35.64 N B. 61.16 N C. 35.64 kN D.41.58 kN E. 142.55 kN
  2. 185.78 kPa The ambient pressure is 100.78 kPa. The pressure gauge on a hot water boiler is showing 85 kPa. Determine the absolute pressure under which this boiler is operating. A. 15.78 kPa B. 85 kPa C. 115.325 kPa D.135.78 kPa E. 185.78 kPa
  3. E. 0.6764 A cylindrical tank has its axis vertical. It is 2 m in diameter and its mass is 800 kg. When it is filled

3A1 Chapter 7 Practice Questions Study online at https://quizlet.com/_bhnzdf 10 /

A. 6.

B. 6.764 kg/m C. 6. D.0. E. 0.

  1. B. 40 kPa An internal combustion engine has 8 cyclinders, the diam- eter of each of the pistons is 10 cm. Assuming the force of explosion within the cyclinder is 314.16 N, determine the average pressure acting on each of the cyclinders. A. 10 kPa B. 40 kPa C. 80 kPa D. 160 kPa E. 320 kPa
  2. C. Kg/m³ The "mass density" of a substance is commonly called "density." It has a unit of: A. Kg/cm³ B. N/kg C. Kg/m³ D.lbs/ft² E. m³/kg
  3. A. Mild steel A solid cylinder is 31 cm in diameter by 2.4 m long. It has the same mass as a lead cube with 0.5 m sides. What material is the cylinder likely made of? A. Mild steel B.Tin C. Brass D.Copper E. Cobalt
  4. D. 62.2 kN A steel storage tank is 5 m long, 2 m wide and 4 m high. It is 60% full of ethylene glycol with a relative

3A1 Chapter 7 Practice Questions Study online at https://quizlet.com/_bhnzdf 11 / density of 1.1. What is the force load exerted by the fluid on one end?

3A1 Chapter 7 Practice Questions Study online at https://quizlet.com/_bhnzdf 13 /

  1. A. Actual me- chanical advan- tage C. Equal to the ratio of mass to its force D. Used to indicate density of a substance compared to the density of water E. Force per unit of area The ratio of the output force to the input force is called the: A. Actual mechanical advantage B. Efficiency C. Velocity ratio D.Velocity proportion E. Mechanical ratio