Basic Physics (1)

Question 1

Which statement concerning heat and/or temperature is true?

a. The speed of sound in the atmosphere energy
of the molecules of any substance

b. There is an inverse relationship between
temperature and heat

c. Temperature is a measure of the kinetic
energy of the molecules of any substance

Answer 1

c. Temperature is a measure of the kinetic
energy of the molecules of any substance

Question 2

The boiling point of a given liquid varies

a. Directly with pressure
b. Inversely with pressure
c. Directly with density

Answer 2

a. Directly with pressure

Question 3

If a double acting actuating cylinder in a 3000 psi system has a piston with a surface rea 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?

a. 9,000 pounds
b. 6,000 pounds
c. 3,000 pounds

Answer 3

b. 6,000 pounds

Question 4

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
**
a. Absolute humidity
a. Relative humidity
b. Dewpoint

Answer 4

a. Relative humidity

Question 5

An airplane wing is designed to produce lift resulting from

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

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

c. Negative air pressure below the wing’s
surface and positive air pressure above the wing’s surface along with the downward
defection of air.

Answer 5

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

Question 6

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

a. Increase In direct proportion to the volume
increase
b. Remain the same
c. Be reduced to one half its original value

Answer 6

c. Be reduced to one half its original value

Question 7

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

a. Asymmetrical lateral control at a near
stall angles of attack
b. Decreased lift In the area of installation at high angles
c. Asymmetrical lateral control at low angles of attack.

Answer 7

a. Asymmetrical lateral control at a near
stall angles of attack

Question 8

If the temperature of a confined liquid is held constant and its pressure is tripled, the volume will

a. Triple
b. Be reduced to one third its original volume
c. Remain the same

Answer 8

c. Remain the same

Question 9

Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?
a. Low temperature with low humidity
b. High temperature with low humidity
c. High temperature with high humidity

Answer 9

c. High temperature with high humidity

Question 10

Which of the following is newton’s first law of motion, generally termed the** law of inertia**

a. To every action is an equal and opposite
reaction
b. Force is proportional to the product of mass and acceleration
c. Everybody persists in its state of rest, or
of motion in a straight line, unless acted
upon by some force.

Answer 10

c. Everybody persists in its state of rest, or
of motion in a straight line, unless acted
upon by some force.

Question 11

Which of the following is NOT considered a method of heat transfer?
a. Convection
b. Conduction
c. Diffusion

Answer 11

c. Diffusion

Question 12

Which will weigh the least?

a. 98 parts of dry air and 2 parts of water
vapor

b. 35 parts of dry air and 65 parts of water
vapor

c. 50 parts of dry air and 50 parts of water
vapor

Answer 12

b. 35 parts of dry air and 65 parts of water
vapor

Question 13

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

a. Wingspan to the wing root
b. Square of the chord to the wingspan
c. Wingspan to the mean chord

Answer 13

c. Wingspan to the mean chord

Question 14

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)?

a. Unmetered pressure,18 PSI;metered
pressure,17.5 PSI;atmospheric pressure 14.5
PSI

b. Unmetered pressure,23 PSI; metered
pressure, 12 PSI;atmospheric pressure 14.3
PSI

c. Unmetered pressure, 17 PSI; metered
pressure, 5 PSI; atmospheric pressure,
14.7 PSI

Answer 14

c. Unmetered pressure, 17 PSI; metered
pressure, 5 PSI; atmospheric pressure,
14.7 PSI

Question 15

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

a. Relative humidity
b. Dewpoint
c. Absolute humidity

Answer 15

c. Absolute humidity