# ASTB Prep

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1. Mechanical Advantage of an Inclined Plane
Length of slope / Height of plane
• Resistance Force (weight) / Effort Force
• OR
• # of ropes that support the pulley
3. 1 lb = ? oz
16
4. 1 gallon = x pints
8
5. 1 gallon = x quarts
4
6. 1 ton = x lbs
2,000
7. Total # of degrees of a shape
(# of sides - 2) * 180
8. Supplementary Angles
9. Complementary Angles
10. 2 times r exceeds one half of t by 5
2r - .5 = 5
11. Questions regarding how fast people can do a job together
Time actually needed / Time can do the job alone = 1
12. Product has been discounted to a new price, what is the percent reduction?
• Old price - new price
• Difference / old price
• multiply numerator by 100, divide
13. You know details of one gear
How many revolutions of other gear?
• r = (D*R)/d
• #of teeth gear A * # revolutions of gear A / # teeth gear B
14. Specific Gravity
Weight of a liquid vs Weight of water
15. 1st Class lever
• Fulcrum in the middle
• Scissors, Pliers
16. 2nd class lever
• Fulcrum at one end, load in between
• Nutrcracker, Wheelbarrow
17. 3rd class lever
• Fulcrum at one end, effort in between
• Tongs, Tweezers
18. Smaller pulley turns ____ than larger pulley
faster
19. Pioneer 10
First US craft to explore outer solar system
20. Characteristics of warm front
• Steady, long periods of rain
• Fog
21. Atmospheres: Lowest to highest
• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere/Ionosphere/Aurora
22. Troposphere
• 20k feet at poles
• 60 k feet at equator
23. Stratoshere
120k ft (20 miles)
24. Mesosphere
300k ft (50 miles)
25. Boundary between Tropo and Stratosphere
Tropopause
26. Ozone layer
Located at higher end of stratosphere
27. You generally need oxygen if flying above
10k ft
28. Air composition
• 78% Nitrogen
• 21% Oxygen
• 1% Argon
• Rest is CO2 and other rare gasses
29. An axe is classified as a
Wedge (Inclined Plane)
30. The farther away the fulcrum is from the resistance arm
• more force is required to lift the load
• higher resistance arm will travel
31. Current is _____ in a series
• constant
• Voltage is not.
32. Voltage is _____ in parallel circuits
• constant.
• Current is not
33. Formula for Voltage
• V = I * R
• I: Current
34. 2 pulley system: movable and fixed pulley
• Movable pulley will only move half the distance
• Movable pulley will only spin half as much as fixed pulley
35. Finding RPM
Needed contacts per minute / # of rods on wheel
36. Pendulums
• Swing weight makes no difference
• Speed is dependent upon length of string
37. If you place an object evenly on 2 scales, each scale will
read half of the total weight.
True
38. 4-stroke engine
• Intake
• Compression
• Combustion
• Exhaust
39. Pressure formula
Force / Area
40. Momentum Equation
Force * Distance
41. Ammeter
Measures current
42. Multimeter
Measures current, volt
43. Vise M.A.
(2*pi*length of handle) / pitch of thread
44. 1 cup = _ oz
8
45. A naval detachment has enough rations to feed 16 people
for 10 days. If 4 more people join the detachment, for how many
fewer days will the rations last?
• 1. Get the number of total rations available: 16 x 10 = 160 rations
• 2. 4 people + 16 people: 20 people
• 3. 160 rations divided amongst 20 people: 8 days
• 4. 8 days is 2 less than 10 days
46. A field can be plowed by 9 machines in 5 hours. If 3
machines are broken and cannot be used, how many hours will it take
to plow the field?
• 1. 9 machines in 5 hours: 45 machine hours
• 2. 3 machines broken: 6 working
• 3. 45/6: 7.5 hours
47. Lever Rules
• I. : MA (leverage) increases with length of lever arm, or placement of fulcrum
• II. Closer fulctrum to load: higher MA
• III. A lever arm in balance: forcexlength = forcexlength on both sides
48. Boyle's Law
• High volume: Low Pressure
• High Pressure: Low Volume
49. Charles' Law
• If gas is at constant pressure,
• High volume: high temperature
• Example: Heating gas doubles its temperature and volume
50. Bernoulli's Principle
As velocity of a fluid increases, pressure decreases

## Card Set Information

 Author: esmenikmati ID: 170428 Filename: ASTB Prep Updated: 2012-09-24 22:19:15 Tags: ASTB Prep Folders: Description: Math/Physics/Aviation Show Answers:

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