AP GN Basic Physics

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?

9,000 pounds.
6,000 pounds.
3,000 pounds.

The boiling point of a given liquid varies

directly with pressure.
inversely with pressure.
directly with density.

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

Convection.
Conduction.
Diffusion.

An engine that weights 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 toward 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

Which condition is the actual amount of water vapor in a mixture of air and water?

Relative humidity.
Dewpoint.
Absolute humidity.

Under which conditions will the rate of flow of a liquid through a metering orifice (or jet) be the greatest (all other factors being equal)?

Unmetered pressure, 18 psi, metered pressure, 17.5 psi; atmospheric pressure, 14.5 psi.
Unmetered pressure, 23 psi, metered pressure, 12 psi; atmospheric pressure, 14.3 psi.
Unmetered pressure, 17 psi, metered pressure, 5 psi; atmospheric pressure, 14.7 psi.

Refer to Figure 61. The amount of force applied to rope A to lift the weight is

12 pounds.
15 pounds
20 pounds

Which will weigh the least?

98 parts of dry air and 2 parts of water vapor.
35 parts of dry air and 65 parts of water vapor.
50 parts of dry air and 50 parts of water vapor.

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?

Absolute humidity.
Relative humidity.
Dewpoint.

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.

The speed of sound in the atmosphere is most affected by variations in which of the following?

Sound frequency.
Ambient temperature.
Barometric 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 its pressure is tripled, the volume will

triple.
be reduced to one-third its original volume.
remain the same.

How much work input is required to lower (not drop) a 120-pound weight from the top of a 3-foot table to the floor?

120 pounds.
360 foot-pounds
40 foot-pounds

Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?

Low temperature with low humidity.
High temperature with low humidity.
High temperature with high humidity.

If the fluid pressure is 800 PSI in a 1/2-inch line supplying an actuating cylinder with a piston area of 10 square inches, the force exerted on the piston will be

4,000 pounds
8,000 pounds
800 pounds

In physics, which of the following factors are necessary to determine power?

L divided by I = R divided by E

L = Length of ramp, measured along the slope.

I = Height of ramp.

R = Weight of object to be raised or lowered.

E = Force required to raise or lower object.

Force exerted, distance moved, and work.
Distance moved and time required.
Force exerted, distance moved, and time required.

What force must be applied to roll a 120-pound barrel up an inclined plane 9 feet long to a height of 3 feet (disregard friction)?

40 pounds
120 pounds
360 pounds

Which statement concerning heat and/or temperature is true?

There is an inverse relationship between temperature and heat.
Temperature is a measure of the kinetic energy of the molecules of any substance.
Temperature is a measure of the potential energy of the molecules of any substance.

What is absolute humidity?

The temperature to which humid air must be cooled at constant pressure to become saturated.
The actual amount of the water vapor in a mixture of air and water.
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.

The temperature to which humid air must be cooled at constant pressure to become saturated is called

dewpoint.
absolute humidity.
relative humidity.

If both the volume and the absolute temperature of a confined gas are doubled, the pressure will

not change.
be halved.
become four times as great.

If all, or a significant part of a stall strip is missing on an airplane wing, a likely result will be

asymmetrical lateral control at or near stall angles of attack.
decreased lift in the area of installation at high angles of attack.
asymmetrical lateral control at low angles of attack.

The purpose of stall strips on airplane wings is to

increase lift in the areas of installation.
prevent stall in the areas of installation.
ensure that the wing root areas stall first.

An airplane wing is designed to produce lift resulting from

positive air pressure below and above the wing’s surface along with the downward deflection of air.
positive air pressure below the wing’s surface and negative air pressure above the wing’s surface along with the downward deflection of air.
negative air pressure below the wing’s surface and positive air pressure above the wing’s surface along with the downward deflection of air.

Which of the following is Newton’s first law of motion, generally termed the law of intertia?

To every action there is an equal and opposite reaction. If a force is applied to an object, the object will supply a resistive force exactly equal to and in the opposite direction of the force applied.
Force is proportional to the product of mass and acceleration. When a force acts upon a body, the momentum of that body is changed.
Objects at rest tend to remain at rest and objects in motion tend to remain in motion at the same speed and in the same direction, unless acted on by an external force.

The purpose of aircraft wing dihedral is to

increase lateral stability.
increase longitudinal stabiility.
increase lift coefficient of the wing.

Aspect ratio of a wing is defined as the ratio of the

wingspan to the wing root.
square of the chord in the wingspan.
wingspan to the mean chord.

A wing with a very high aspect ratio (in comparison with a low aspect ratio wing) will have

increased drag at high angles of attack.
a low stall speed.
poor control qualities at low airspeeds.

The desired effect of using winglets on an aircraft’s wingtips is to

increase the lift to drag ratio.
reduce the aspect ratio.
optimize wing dihedral and improve lateral stability.

The main rotor system on a helicopter is classified in three groups,. Which of those listed is NOT one of these groups?

The fully articulated rotor system.
The flexible-beam rotor system.
The semi-rigid rotor system.

Which of the following statements is correct?

When the cyclic pitch control level is raised, the blade angle of all the rotor blades increases uniformly and they create the lift that allows the helicopter to take off vertically.
When the collective pitch control level is raised, the blade angle of all the rotor blades increases uniformly and they create the lift that allows the helicopter to take off vertically.
When the collective pitch control level is raised, the blade angle of the aft rotor blades decreases uniformly and they create the lift that allows the helicopter to take off vertically.

AP GN Basic Physics

Jon K

Quiz Summary

Information

Results

Results

Categories

1. Question

2. Question

3. Question

4. Question

5. Question

6. Question

7. Question

8. Question

9. Question

10. Question

11. Question

12. Question

13. Question

14. Question

15. Question

16. Question

17. Question

18. Question

19. Question

20. Question

21. Question

22. Question

23. Question

24. Question

25. Question

26. Question

27. Question

28. Question

29. Question

30. Question

31. Question

32. Question

Responses

Enjoying the Free Course?

Enjoying the Free Course?