Pneumatic & Hydraulic Systems; Theory

Part A Multiple Choice

  1. Pascal's Principle states that
    1. A more dense object will sink in water
    2. A pressure on a confined fluid is transmitted undiminished throughout that fluid in every direction
    3. The pressure inside a fluid is directly proportional to the depth of the fluid
    4. The pressure of a fluid is inversly proportional to its velocity

  2. Pneumatics is a branch of science that deals with
    1. how objects float in fluids
    2. how mechanical devices like a back-hoe work
    3. the study and use of gases as related to the mechanical aspects of physics
    4. a study of fluid flow through a system of pipes or tubes

  3. If the density of an object is 1.67 g/cm³, calculate the bouyant force of water on this object if its mass is 3.50 kg.
    1. 15.6 N
    2. 34.3 N
    3. 13.8 N
    4. 20.5 N

  4. A 0.025 g object exerts a force of
    1. 0.245 N
    2. 2.55 × 10-3 N
    3. 2.45 × 10-3 N
    4. 2.45 × 10-4 N

  5. A carborator works on
    1. Bernoulli's Principle
    2. Pascal's Principle
    3. Tygor's Principle
    4. The principle that moving fluids produce pressure

  6. A small cylinder has a cross sectional area of 10 cm². If a pressure of 300 kPa (guage) is applied to this cylinder, what force is is generated on a larger cylinder of cross sectional area of 100 cm²?
    1. 300 N
    2. 3000 N
    3. 30000 N
    4. 300000 N

  7. Refering to fig #1, if the pressure in gauge #1 is 500 kPa, then the pressure in guage # 2 is
    1. 250 kPa
    2. 500 kPa
    3. 750 kPa
    4. 1000 kPa

  8. Archimede's Principle states that
    1. The bouyant force of a fluid in motion will cause an object to be pushed along with the fluid
    2. The bouyant force of a fluid is always proprtional to its density
    3. The bouyant force exerted on a body immersed in a fluid is equal to the weight of the fluid displaced by that body
    4. The bouyant force of a fluid is proportional to weight loss of that object when immersed in that fluid

  9. The study of liquids at rest is called
    1. pneumatics
    2. hydraulics
    3. hydrostatics
    4. hydrolysis

  10. A 7.50 kg mass is placed on top of a hydraulic piston. A pressure guage in the system reads 400 kPa. What is the cross-srctional area of this piston?
    1. 0.184 m²
    2. 5.44 m²
    3. 53.3 m²
    4. 73.5 m²

  11. If a 500 g mass has a mass reading of 400 g in a fluid, what is the buoyant force of this fluid?
    1. 100 g
    2. 1.25 N
    3. 0.98 N
    4. can not solve, density of fluid is missing

  12. The pressure inside a liquid is independent of
    1. density
    2. depth
    3. pressure on the surface
    4. shape of the container

  13. To find the density of a rock a geologist suspends the rock from a spring balance and weighs the rock in air and in water. The mass in air is 45 g and in water it is 32 g. The density of this rock is
    1. 2.87 g/mL
    2. 3.46 g/mL
    3. 1.27 g/mL
    4. 1.41 g/mL

  14. Which of the following is not an example of "Advantages of Fluid Power"
    1. eliminates the need for gears, cam shafts and levers
    2. power is transmitted evenly through the system and every direction
    3. the high pressure in the systems can be dangerous
    4. the mechanisms are not subject to great wear and tear

  15. A nail gun would be an example of a
    1. simple machine
    2. pneumatic system
    3. hydraulic system
    4. hydrostatic system

    PART B Diagram Page: complete as required.