Usaf 2F071 CDC Quiz

249 Questions | By Brandon_tate_198 | Last updated: Mar 21, 2022 | Total Attempts: 110

Questions

Settings

Create your own Quiz

Quiz over all 3 volume's UREs

Questions and Answers

1.

What is a major difference between a gas and a liquid?
- A.
  
  A liquid is far less compressible than a gas.
- B.
  
  A gas is far less compressible than a liquid.
- C.
  
  A liquid is more combustible than a gas.
- D.
  
  A gas is more combustible than a liquid.
2.

What is the lifting force of a liquid called?
- A.
  
  Laminar.
- B.
  
  Interface.
- C.
  
  Buoyance.
- D.
  
  Dynamic pressure.
3.

Which best describes immiscible liquids?
- A.
  
  They mix well together.
- B.
  
  One liquid will float on the other.
- C.
  
  They will become an intrained solution.
- D.
  
  They will repel each other and react violently.
4.

Which unit of measurement would indicate velocity of flow?
- A.
  
  Feet per second
- B.
  
  Gallons per minute.
- C.
  
  Cubic feet per second.
- D.
  
  Cubic gallons per minute.
5.

Which physical factor affects the behavior of liquids in both rest and motion?
- A.
  
  Friction, applied forces, and gravity.
- B.
  
  Friction, inertia, and atmospheric pressure.
- C.
  
  Gravity, atmospheric pressure, and inertia.
- D.
  
  Gravity, atmospheric pressure, and applied forces.
6.

What determines the intensity of the excess pressure in a water-hammer wave?
- A.
  
  The size of the pipe.
- B.
  
  The specific gravity of the fuel.
- C.
  
  The change in gallons per minute.
- D.
  
  The amount of extinguished velocity.
7.

Which type of measurement may be used to express pressure?
- A.
  
  Kilograms.
- B.
  
  Pounds.
- C.
  
  Tons.
- D.
  
  Pounds per square inch.
8.

The standard measure for atmospheric pressure is equal to how many pounds per square inch?
- A.
  
  13.1 psi.
- B.
  
  14.7 psi.
- C.
  
  15.2 psi.
- D.
  
  17.9 psi.
9.

What type of pressure reading is also referred to as overpressure?
- A.
  
  Zero pressure.
- B.
  
  Gauge pressure.
- C.
  
  Absolute pressure.
- D.
  
  Atmospheric pressure.
10.

What term is used to describe the total pressure acting as a gas?
- A.
  
  Overpressure.
- B.
  
  Gauge pressure.
- C.
  
  Absolute pressure.
- D.
  
  Atmospheric pressure.
11.

Which temperature scale is commonly used for scientific measurements?
- A.
  
  Kelvin scale.
- B.
  
  Rankine scale.
- C.
  
  Réaumur scale.
- D.
  
  Fahrenheit scale.
12.

Which gas law declares that cooling a gas decreases its volume?
- A.
  
  Boyle’s law.
- B.
  
  Charles’ law.
- C.
  
  Dalton’s law.
- D.
  
  Gay-Lussac’s law.
13.

Two or more atoms combined is called a
- A.
  
  A compound.
- B.
  
  An element.
- C.
  
  A molecule.
- D.
  
  A mixture.
14.

According to the electron theory, atoms are composed of
- A.
  
  Protons, neutrons, and electrons.
- B.
  
  Neutrons, elements, and protons.
- C.
  
  Electrons, molecules, and elements.
- D.
  
  Electrons, neutrons, and matter.
15.

How do the charges of protons and electrons differ?
- A.
  
  Protons have positive charges, and electrons have neutral charges.
- B.
  
  Protons have neutral charges, and electrons have positive charges.
- C.
  
  Protons have negative charges, and electrons have positive charges.
- D.
  
  Protons have positive charges, and electrons have negative charges.
16.

The uniform movement of electrons in a specific direction is called
- A.
  
  Electrical potential.
- B.
  
  Free electrons.
- C.
  
  Electric current.
- D.
  
  Ionization.
17.

Which shell of the valence electrons determines whether a material is a good or a poor conductor of electricity?
- A.
  
  The outermost shell.
- B.
  
  The middle shell.
- C.
  
  The second shell.
- D.
  
  The first shell.
18.

Which statement best describes a positive ion?
- A.
  
  An atom that lost a proton and has more electrons.
- B.
  
  An atom that lost an electron and has more protons.
- C.
  
  An atom that has an equal number of electrons and protons.
- D.
  
  An atom that cannot throw off any protons.
19.

What effect of current causes an electric motor to produce mechanical energy?
- A.
  
  Heat.
- B.
  
  Magnetism.
- C.
  
  Chemical.
- D.
  
  Reactance.
20.

What is the unit of measurement for electrical power?
- A.
  
  Watts.
- B.
  
  Volts.
- C.
  
  Amps.
- D.
  
  Ohms.
21.

A 3-horsepower motor consumes how much power?
- A.
  
  755 W.
- B.
  
  1,534 W.
- C.
  
  2,023 W.
- D.
  
  2,238 W.
22.

A magnet that is magnetized by induction from an external source is called
- A.
  
  A natural magnet.
- B.
  
  An electromagnet.
- C.
  
  An artificial magnet.
- D.
  
  An electromechanical magnet.
23.

When do the magnetic lines of force in a magnet cross?
- A.
  
  When the north pole of a magnet is placed near the north pole of another magnet.
- B.
  
  When the south pole of a magnet is placed near the north pole of another magnet.
- C.
  
  When a permanent magnet and a temporary magnet are put together.
- D.
  
  Magnetic lines of force never cross each other.
24.

What are the two most common methods of producing voltage?
- A.
  
  Magnetic and heat.
- B.
  
  Chemical and heat.
- C.
  
  Chemical and mechanical.
- D.
  
  Magnetic and mechanical.
25.

What type of current flow is the result of voltages produced by batteries and thermocouples?
- A.
  
  Open current.
- B.
  
  Direct current.
- C.
  
  Latent current.
- D.
  
  Alternating current.