PHYSICS 1 OF 2

Which of the following is NOT considered a method of heat transfer?

• Convection

• Diffusion

• Conduction

If a double-acting actuating cylinder in a 3,000 psi system has a piston with a surface area of three square inches on the extension side, and a rod with a cross-section area of one square inch attached to the piston on the other side, approximately how much force will the actuator be able to produce when retracting?

• 8,000 pounds

• 6,000 pounds

• 12,000 pounds

The boiling point of a given liquid varies

• directly with pressure

• inversely with pressure

• directly with density

An engine that weighs 350 pounds is removed from an aircraft by means of a mobile hoist. The engine is raised 3 feet above its attachment mount, and the entire assembly is then moved forward 12 feet. A constant force of 70 pounds is required to move the loaded hoist. What is the total work input required to move the hoist?

• 840 foot-pounds

• 1,890 foot-pounds.

• 1,050 foot-pounds.

The two types of energy are classified as

• Conductive & Inductive

• Mechanical & Electrical

• Potential & Kinetic

What barometric pressure and temperature constitutes a standard day?

• 29.92”Hg @ 70 F

• 29.92”Hg @ 59 F

• 0”Hg @ absolute 0

Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure?

• Relative humidity

• Dewpoint

• Absolute humidity

The speed of sound in the atmosphere

• varies according to the frequency of the

  sound.

• changes with a change in temperature.

• changes with a change in pressure

If the volume of a confined gas is doubled (without the addition of more gas), the pressure will (assume the temperature remains constant)

• increase in direct proportion to the volume increase.

• remain the same.

• be reduced to one-half its original value

- If the temperature of a confined liquid is held constant, and it’s pressure is tripled, the volume will

• triple

• be reduced to one-third its original volume

• remain the same.