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M603 Review
1. What uses liquids to
provide mechanical
power?
Hydraulics.
2. What deals with the use of
gases for mechanical power?
Pneumatics.
3. What uses both liquids and
gases for power?
Pneudraulics.
4. What can both liquids and
gases be classified as in
pneudraulic systems?
Fluids.
5. What states that external
force applied to an enclosed
liquid will be transmitted
throughout the liquid?
Pascal’s Law.
6. What states that the volume
of gas is inversely proportional
to its pressure if its
temperature remains the
same?
Boyle’s Law.
7. What states that gases
expand or contract in direct
proportion to changes in
temperature if their pressure
remains constant?
Charles’ Law.
8. What is based on the fact
that liquid displaced in one
area must be relocated to
another area allowing a small
input effort to be multiplied
and applied to an output
mechanism in pneudraulic
systems?
Mechanical Advantage.
9. What causes turbulence to
increase and creates loss of
energy?
A venturi.
10. What stores hydraulic fluid
in a pneudraulic system?
The reservoir.
11. What pneumatic
component permits fluid flow
in only one direction?
A check valve.
12. What component stores
fluid under pressure to
dampen power surges and
provides emergency power in
the event of pump failure?
The accumulator.
13. What is the direction of
hydraulic fluid in a pneudraulic
system controlled by?
The selector valve.
14. What pneudraulic
component transforms fluid
pressure into mechanical
movement?
An actuating cylinder.
15. In which check valve does
fluid enter an inlet port,
overcome spring tension, and
force a cylinder off its’ seat
allowing fluid to pass?
A cone check valve.
16. Which check valve uses a
follower to push a ball against
a seat?
A ball check valve.
17. In which actuator does
fluid enter and activate a
piston and compress a spring
that later returns the piston to
its’ original position?
A single-acting actuator.
18. In which actuator does
fluid enter one port and push
the piston to the other end of
the cylinder activating the
mechanism attached to the
piston rod?
A double-acting actuator.
19. What type of force is a
turning force that tends to
produce rotation?
Torque.
20. What describes a measure
of the tendency to produce
rotation?
Applied torque.
21. What describes the
tendency to resist rotation?
Resisting torque.
22. What states that two equal
forces acting on an object on
the same line of action in
opposite directions will cause
it to remain at rest?
Condition of Equilibrium.
23. What do we call a straight
line from the axis of rotation to
the point where the force
causing rotation is located?
The moment arm.
24. What do we call a toothed
wheel used to transmit torque
by use of interlocking teeth?
A gear.
25. What gear is used to
transmit power to another
gear?
A drive gear.
26. What gear receives its
power from another gear?
A driven gear.
27. When two gears are
meshed together, what is the
smaller gear referred to as?
A pinion gear.
28. When heavy gears are
used, what is the larger gear
referred to as?
A bullgear.
29. What do we call a gear
with teeth on the inside of
the gear pointing toward
the shaft or axis or
rotation?
An internal gear.
30. What do we call gear teeth
that are cut parallel to or in the
same line as the axis of
rotation?
Straight gear teeth.
31. What do we call gear teeth
that are cut slantwise giving
each tooth a leading and
trailing edge causing less
slippage and making for
quieter operation?
Helical gear teeth.
32. Which gears have teeth on
each half of the gear cut in
opposite directions which
offset and cancel out the axial
thrust created by each gear
half?
Herringbone gears.
33. Which most commonly
used gears transmit torque
between two parallel shafts
that are not in a straight line?
Straight spur gears.
32. Which gear teeth are cut
slantwise across the face of
the gear resulting in smoother,
quieter operation and less lost
motion?
Helical spur gear teeth.
33. Which gear can save
space by putting two or more
gears in a smaller area?
An internal gear.
34. What is used when pinion
gear rotation is limited and
only a portion of a larger gear
is needed?
A sector gear and pinion.
35. What is used when it is
necessary to change rotary
motion to linear motion?
A rack and pinion gear.
36. What is a combination of a
screw and spur gear that is
often used for lifting?
A worm and worm wheel.
37. What gears are used to
transmit power between shafts
that meet at an angle?
Bevel gears.
38. What type of bevel gears
connect 90 degree angle
shafts?
Miter gears.
39. What do we call an
enclosed unit with a series of
gears that transmits and
converts the speed and torque
of a power source to that
needed for a piece of
equipment?
A gear train.
40. What do we call a
mechanical link between an
aircraft engine and its
accessories?
An accessory drive gear box.
41. What do we call the
opposition to movement of
one surface when moving in
contact with another?
Friction.
42. What type of friction
occurs when two surfaces rub
together?
Sliding friction.
43. What type of friction
occurs in ball bearings?
Rolling friction.
44. What kind of friction
occurs when gear teeth
mesh?
Wiping friction.
45. What are smooth contact
surfaces, bearings, and
lubricants used for?
Friction reduction.
46. What do we call a part in
which a journal, pivot, pin, or
shaft turns or revolves?
A bearing.
47. What can we call sliding
bearings that support reciprocal
motion shafts?
Frictional bearings.
48. What can we call roller or
ball bearings?
Antifrictional bearings.
49. What do we call frictional
bearings that are coated with a
film of lubricants to separate
moving machine parts from
stationary ones?
Sliding bearings.
50. What are the three most
commonly used frictional
bearings?
Reciprocal motion bearings,
journal bearings, and thrust
bearings.
51. What type of bearing is made
of a soft antifrictional metal to
reduce friction?
A babbit-lined bearing.
52. What types of bearings
require smaller housings than
other bearings with the same
load capacity and can operate at
higher speeds?
Ball and roller bearings.
53. What type of bearing has less
friction than any other type of
bearing?
Ball bearings.
54. What type of bearing would
be found in generators,
magnetos, starters, and other
aircraft engine accessories?
A needle roller bearing.
55. What type of bearing has a
load pressure exerted outwardly
along the radius of the shaft?
A radial bearing.
56. Which bearing has load
pressure exerted along the shaft
at a right angle to the bearing?
A thrust bearing.
57. What is caused by striking
or colliding with an object?
Shock.
58. What states that substantial
force is required to either start or
stop motion?
Newton’s First Law.
59. What states that for every
action there is an opposite but
equal reaction?
Newton’s Third Law.
60. What states that a force
acting on a body will stretch it in
proportion to the amount of force
applied?
Hooke’s Law.
61. What do we call the amount
of force applied to an object
measured in pounds per square
foot?
Stress.
62. What do we call a
deformation caused by applied
stress?
Strain.
63. Which kind of stress causes a
material to lengthen and tear
apart?
Tensile stress.
64. Which kind of stress causes
one part of a material to move in
the opposite direction from the
other?
Shear stress.
65. What do we call a metal
component that can be stretched,
compressed, or twisted and
return to its original shape?
A spring.
66. What do we call a component
that is made of flat or slightly
curved bars, plates, or leaves of
metal bound together as a single
unit?
A leaf spring.
67. What do we call a component
that is composed of two bundles
of curved metal leaves connected
together at the ends?
A full elliptic leaf spring.
68. What do we call a component
that is composed of a single
bundle of curved metal leaves
connected together?
A half-elliptic leaf spring.
69. What do we call a component
that is a flat spring that may be
used in place of half-elliptic leaf
springs on light vehicles?
A torsion bar.
70. What type of component is
used where a small compact
spring is needed to maintain
spacing between components?
A flat spring.
71. What type of spring is
designed to be tightened or
wound and release power as
they unwind?
A spiral spring.
72. Which type of spring is the
most common and may be used
in compression, extension or
tension, or torsion applications?
A helical spring.
73. What type of spring operates
by coiling and uncoiling and
opposes being turned tighter?
A helical torsion spring.
74. What type of spring operates
by holding pieces apart and
resists forces which would
shorten its length?
A compression spring.
75. Which springs are often
used in valve arrangements?
Cone springs.
76. What do we call a helical
cone spring made from a flat bar
wound so that it requires little
space and resists buckling or
slipping sideways?
A volute spring.
77. What type of spring resists
extension and is used to hold
pieces together?
A helical tension spring.
78. What do we call a self
contained hydraulic unit designed
to support an aircraft on the
ground and absorbs the shock of
landing?
A shock strut.
79. What do we call a component
that maintains constant cable
tension in spite of temperature
variations, cable stretch, and
other mechanical variations?
A cable tension regulator.