ASTB Mechanical Comprehension Test

229 cards

IE or Firefox are the preferred browsers.  For each question, select the option that is most nearly correct. If you answer the questions in order:the ASTB Study Supplement Book Math Skills start from #208-228, consisting of questions formed from the lectures and the practice test section of the packet.the Peterson's Master the Officer Candidate Tests ebook questions start from #175-207, with a mix of simple...


 
  
Created Apr 14, 2010
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  Side A   Side B
1
The wheels are connected by a belt. As the wheel on the left makes one revolution, the wheel...
 
more than one revolution
2
If the wheel on the left turns clockwise, in which direction does the wheel on the right turn?
ClockwiseCounterclockwise
 
Counterclockwise
3
A woman sits in a dragster at the beginning of a race. As the light turns green, she steps...
 
More than while stationary
4
All the gears in the system are moving and Gear 1 rotates clockwise. What other gears in the...
 
3 and 5
5
In which case is less force needed to move weight (W) up the ramp?
A
B
The force is...
 
A
6
If each pendulum is released from the position shown, which pendulum requires the longest amount...
 
B
7
The voltage drop or potential difference is greater across which resistor?
Ra
Rb
It...
 
It is the same across either resistor
8
If the large portion has 3 times the surface area of the small piston, how far must the small...
 
3 inches
9
If you had to swim across a fast moving stream exactly perpendicular to the banks, when you...
 
Directly across from where you started
According to the answer sheet given, directly across...
10
If the three squad leaders are to stay on line, which of them must turn the most slowly?
ABC
 
C
11
In order to balance the scale above, the fulcrum should be moved
toward A
toward B
in...
 
toward B
12
If the scale was balanced before u moved the fulcrum, which of the balls is more dense?
Ball...
 
Ball B
13
Where would it be best to hold a pruners' handles while trying to cut a branch?
A
B
It...
 
B
14
If the current leaves the battery in the direction shown in the diagram, what is the direction...
 
A
15
The voltage drop is greater across which resistor
Rx
Ry
It is the same across either...
 
Rx
16
Where is the current greater in the circuit?
Greater at A than BGreater at B than AThe same...
 
The same at A and B
17
X, which has a negative charge, is positioned between a positive charge (A) and a negative...
 
A
18
In a stream, water flows through narrow and wide sections. In which sections does the water...
 
Narrow section
19
At what point is the velocity of a bullet fastest?
When it leaves the muzzle
When it...
 
When it leaves the muzzle
20
The rate of heat exchange is faster between
an ice cube and 100° glass of water
an ice...
 
an ice cube and 100° glass of water
21
If two glasses of water 40° and glass A was 1/2 full whle glass B was 3/4 full, which glass...
 
B
22
Did you read a mechanical comprehension hand out?
No, but I will now.
No! What hand out?
Yes,...
 
Yes, and I understood everything.
23
If the large pistion has 2 times the surface area of the small piston, how far must the large...
 
1/2 inch
24
When the wheels X are turned at the same speed, which turns wheels Y faster?
Wheel X1
Wheel...
 
Wheel X1
25
Imagine if wheels X where the front  sprocket of a bicycle and wheels Y the rear sprocket....
 
System A
26
If wheel X1 is exactly twice the size wheel Y1, and wheel X1 is turned one time, how many times...
 
Two turns
27
In system A, as wheel X1 makes one revolution, point A
travels a greater distance than point...
 
travels the same distance as point B
28
Above is a cross section of a wing. Air travels over it and under it. As the wing moves through...
 
greater above the wing
29
When the plug in the tube is removed, water flows
into the tube
out of the tube
neither...
 
into the tube
30
For which position of the weight is the tension on the string at point X greater?
ABIt is...
 
B
31
When is it more difficult to hold an inflated beach ball under water?
Close to the surface
Down...
 
Down deep
32
When does a beach ball seem more buoyant?
Close to the surface
Down deep
The buoyancy...
 
Down deep
33
Which weight exerts less pull on the horizontal bar from which the weights hang by strings?
A
B
Each...
 
A
34
A submarine is traveling through the ocean when its outer hull cracks and air pushes out of...
 
A
35
A submarine is traveling through the ocean when its outer hulls cracks and air pushes out its...
 
towards the starboard
36
If the board to the left was placed in water, in what orientation would it float?
A higher...
 
B higher than A
37
If two resistors and a battery are arranged in each of the above circuits, which circuit arrangement...
 
Circuit A
38
The lever above is anchored just to the left of point A. If one were to raise it one inch measured...
 
more than one inch
39
In which case is more force needed to raise the weight?
A
B
The force is the same...
 
A
40
Which system requires more rope to be pulled to lift the weight the same distance?
A
B
They...
 
B
41
Which pendulum takes less time to make one swing?
A
B
Each takes the same time to...
 
A
42
If pendulum A was the same length as pendulum B, which pendulum would take more time to make...
 
Each would take the same time to make one swing
43
Newton's First LawAn object in motion will stay in motion, object at rest will stay

in...
 
at rest
44
Newton's Second Law
Force = Mass * 

Gravity
Acceleration
Velocity
Speed
 
Acceleration
45
Newton's Third Law
For every action there is

a) an equal and opposite reaction
b)...
 
a) an equal and opposite reaction
46
Speed of conduction, which occurs in solids and stationary liquids

a) creates more heat...
 
c) depends on the temperature difference
47
Butcher Knives, Axes, Nail Cutters, are examples of

Levers
Pulleys
Wedges
Screws
 
Wedges
48
This device is typically used to measure wires, spheres, shafts and blocks.

Micrometer
Multimeter
Tape...
 
Micrometer
49
Compressing air in a closed place will _______ the volume and ______ the pressure

decrease,...
 
decrease, increase
50
Bernoulli's principal

applies to liquids
applies to air
involves flow and pressure
all...
 
all of the above
51
This class of lever is like your everyday crowbar. The fulcrum is in the middle with the...
 
First class lever
52
On this class lever, the fulcrum is on the end, the resistance force, the load, is in the...
 
Second class lever
53
On this class lever, the fulcrum is on the end of one side, the effort force is in the middle,...
 
Third class lever
54
The formula for force is
 
mass times acceleration
55
The maximum weight, W, that can be lifted as shown with a pull of 100 lbs is
100 lbs
200...
 
200 lbs
56
A 5 kg wad of clay is tied to the end of a string. A 300 gm copper moving horizontally is embedded...
 
8.3 m/s
57
Which exerts a larger force over a distance?
A small force over a long distance
A large...
 
A small force over a long distance
58
The formula for Work is
 
Force x distance
59
The formula for Efficiency is
 
Workout/Workin , since friction causes inefficiency. The fraction is never greater than...
60
A force acting on a surface is called pressure, and is calculated by
 
Pressure = Force / Area
Can be used for fluid pressure and atmospheric pressure
61
An observer standing on the ground sees you running 55 mph. If you were running towards the...
 
45 mph
62
A 300 lb weight rests on a hydraulic surface with an area of 376 square inches (2 square ft)....
 
28.8 lbs
63
Pressure in liquids that are not moving is called ________ pressure, and is caused by ______....
 
hydrostatic/gravity/increases
64
____________ pressure is caused by the weight of the air between the earth's surface and space.
Hydraulic
Atmospheric
Hydrostatic
 
Atmospheric
65
Energy travels from objects of different temperature in the form of _____ through the process...
 
Heat
66
_________ occurs in liquid and gases by calculating currents caused by a difference in density....
 
Conduction/Convection/Temperature
67
Electrical forces are caused by electrical charges which may be positive or negative.
Which...
 
Electrical forces decrease as the distance between charge particles increases.
68
This circuit element dissipates energy through heat
Resistors
Capacitors
Inductors
Diodes
Transformers
 
Resistors
69
This circuit element stores electrical energy between two parallel plates
Resistors
Capacitors
Inductors
Diodes
Transformers
 
Capacitors
70
This circuit element stores magnetic energy
Resistors
Capacitors
Inductors
Diodes
Transformers
 
Inductors
71
This circuit element restricts current to only one direction. A semiconductor used as a rectifier....
 
Diodes
72
This circuit element is used to convert electricity from one voltage to another
Resistors
Capacitors
Inductors
Diodes
Transformers
 
Transformers
73
The two kinds of circuits that you are responsible for are:
 
Parallel circuitsSeries circuits
74
These kinds of circuits are identifies by seeing sever circuit elements, (resistors, lights,...
 
Parallel circuits, and in this circuit, the current gets divided between two or more elements
75
In these kinds of circuits, all of the circuit-elements are in a row along a single wire similar...
 
Series circuits, and in this circuit, the voltage will continue to drop as it passes through...
76
What is Ohm's law?
 
I = V/R
77
As you follow the path of the current from the positive node away from the battery and through...
 
Voltage drop
78
The theory behind leverage is that the longer the lever, the more ______ u produce.
force
torque
distance
weight
 
torque, which is the product of force and distance
79
Doubling the length of the lever-arm would ________ the torque that you apply.

 
double
80
The torque created by the hand must _______ the torque produced by the weight before it can...
 
Equal
81
Left Side:Force = 60 lbsDistance to fulcrm = 8 ft

Right Side:
Force = ?
Distance...
 
32 lbs
82
The _______________ of a lever is calculated by dividing the arm-length that you are applying...
 
Mechanical Advantage
83
What is the formula for the Mechanical Advantage of a lever?
 
Effort Arm / Resisting Arm
MA = length of effort arm ÷ length of resistance arm.
84
What is the Mechanical Advantage of in the diagram?
1
1.44
1.88
2
 
1.88
85
You may see problems where weights and forces are acting on a single lever arm. It's possible...
 
clockwise and counterclockwise
86
Solve for the unknown force or distance
11 lbs
15 lbs
10.9 lbs
33 lbs
 
11 lbs
87
A pendulums has three  weights attached, each 8 in away from each other. One string is...
 
a) The one with the longer string takes the longest to make one complete swing
The weight...
88
You had two tennis balls and held them over a 10 story building, and you dropped Tennis ball...
 
They hit the ground at the same time
89
Pushing a weight up an incline requires only a fraction of the force needed to lift the weight...
 
all of the above
90
For a height of 5, and a slope-length of 10, the Mechanical Advantage in the diagram is
10
15
1
2
 
2
91
The mechanical advantage for a pulley system

a) equals the number of ropes within the...
 
equals the number of ropes within the system

Only MOVEABLE pulleys provide mechanical...
92
The load is supported by how many strands of rope?

1
2
3
4
 
3
93
If the pull of the truck in the diagram is 100 lbs, what is the maximum weight of the object?
100...
 
400 lbs
NOTE: Also the weight will raise 1 ft for every 4 ft you pull
94
When several ropes are in contact with the weight, they all contribute equally. Tension is...
 
the force that the rope sustains internally

the force that is needed to move the weight...
95
In the figure, there are ropes holding the weight up. Therefore they each contribute ____ of...
 
1/3
96
This specifies the change in position of a point in reference to a previous position. In simple...
 
Displacement
97
R = (D*R)/d is the formula for
Radius
Range
Gear Revolutions
 
Gear Revolutions
r=(D*R)/d ; r*d=R*D
98
Hydrometers use floats to measure
specfic gravity
displacement
hardness of water
amounts...
 
specfic gravity
99
Specific gravity is the weight of a ______ compared with the weight of the water.
solid
gas
liquid
mass
 
Liquid
100
The liquid with the highest specific gravity will cause
the float to rise higher in the...
 
the float to rise higher in the glass tube
101
Pliers and scissors are ________ levers and explain where the fulcrum of the lever is.
First...
 
First class.
The fulcrm is in the middle
102
A nutcracker or wheelbarrow are _________ levers.
First Class
Second Class
Third Class
 
Second class.

The fulcrum is at one end, load is in between.
103
Tongs or tweezers are examples of _________ levers
First Class
Second Class
Third...
 
Third Class
Fulcrum is at one end, effort is in between.
104
In pulley's, the smaller pulley will turn _______ than those larger than it.
Faster
Slower
Same...
 
Faster
It has to "keep up" and therefore turns faster.
105
a* d = A * D
a = area
d = displacement
A = bigger area
d = bigger displacement

This...
 
Mechanical Advantage in a piston
106
An axe is classified as a wedge, which is an
inclined plane
first class lever
second...
 
inclined plane
107
The __________ the fulcrum is from the resistance arm, the __________ amount of force that...
 
closer, greater, higher
108
No electricity flows through burnt out bulbs, but a ________ can bypass it if connected on...
 
voltimeter
109
Which of the following is true:
Current and Voltage varies in a parallel
Current is constant...
 
Current is constant in a series, voltage is not
Current * resistance = voltage
110
The current with the _______ resistance is usually in series, because it forces the current...
 
greater
111
In a 2 pulley system, the movable pulley will only move up half the distance, and spin half...
 
No answer. That was a statement.
112
What is the rpm for this wheel, that requires 2 contacts per second?
15
16
48
8
 
15
twice per second = 120 contacts per minute. 8 rods on wheel. 120/8=15
113
Heat is a form of
calories
motion
energy
pressurization
 
energy
114
On a standard day, at sea level, assuming static conditions, the speed of sound is
1100...
 
1100 ft per sec
115
For a plane to fly, air flowing over the top of a wing creates a vaccum, while the air flowing...
 
a) remains at approximately the same air pressure
116
The diagram depicts airflow around the wing of an aircraft. Most of the lift is caused by
a)...
 
d) decreased air pressure on the top side (side A)
117
In the diagram, which of the ff statements is not true?
a) pulley 2 would spin faster than...
 
c) pulley 1 would spin faster than pulley 3
according to the book
118
Which tool below is the best for cutting metal?
hacksaw
chainsaw
rotary saw
handsaw
 
hacksaw
hacksaw was designed for metal.
119
Which of the ff is a type of lever?
elevator
seesaw
door hinge
electrical cord
 
seesaw
120
What is the formula of force for a lever?
 
Fᴱ = FL dL / dᴱ

Formula can be changed to
Fᴱ dᴱ = FL dL

Fᴱ...
121
Approx how much force must be exerted to lift the box?

67 lbs
100 lbs
250 lbs
258...
 
67 lbs
Fᴱ dᴱ = FL dL
Fᴱ 30ft = 200lb * 10ft
Fᴱ 30ft = 2000lbft
Fᴱ...
122
Which wrench would require more force to turn a bolt?
Wrench A
Wrench B
No Difference
None...
 
Wrench A
123
In order to move the block five feet, how many feet of rope would have to be pulled?
5
10
15
20
 
15
124
The number of cranks the crankshaft of a V-6 engine has is
2
4
6
8
 
6
6 pistons, 1 crank per piston
125
Pulley A is the same size of Pulleys B and C, and twice the size of Pulley D. For each revolution...
 
two
according to the book, two.
126
In order to lift a 100 lb load onto a dock five feet high, using only 25 lbs of force, how...
 
20 ft
100 / 25 = 4
4 = required MA for an inclined plane4 * 5 feet high = 20 ft
127
One horsepower is equal to
a) 33,000 ft-pound work per min
b) 150 lbs of force in an...
 
a) 33,000 ft-pound work per min
128
In the diagram, how many pulleys are turning in a clockwise direction?
one
two
three
four
 
four
according to the book, 4
129
Wheel A has a diameter of 10 inches. Wheel B has a diameter of 25 inches. If both revolve at...
 
Wheel B
130
How many gears are turning in a counterclockwise direction?
two
three
four
five
 
three
131
If Gear 1 has revolves twice, how times will Gear 2 revolve?
1
2
3
4
 
1

The picture would have 2 gears, a small 10 tooth, and a large 20 tooth.
132
In the figure, for each complete revolution of the cam, how many times will the valve open?
1
2
3
4
 
3
133
What is the area of a cylinder?
 
2(π r²) + (2 π r)* h
134
In the hydraulic system depicted, the cylinder on the left has a diameter of 2 inches and the...
 
900 lbs

135
In the design, which tank(s) will overfill?
Tank A
Tank B
Tank A and C
Tank B and...
 
Tank A and C
136
Which of the following are not parts of a braking system of an automobile?
discs
master...
 
axel
137
On a braking system, the axel supports the wheel, but is not part of the braking system. The...
 
master cylinder
138
When a machine magnifies force, it is referred to as
magnification factor
mechanical...
 
mechanical advantage
139
A pitch is
a) the distance between the threads of a screw
b) the gap measurement...
 
a) the distance between the threads of a screw
140
When an object is at equilibrium
a) its velocity does not change
b) the object speeds...
 
a) its velocity does not change
141
Equilibrium is
a) when at object is at rest
b) when 2 or more forces act to cancel the...
 
b) when 2 or more forces act to cancel the effects of each other
An object at equilibrium...
142
An example of a simple machine is

a door hinge
light switch
can opener
all...
 
all of the above
143
When a helium-filled ballon rises, the force responsible is
friction
air pressure
buoyancy
gravity
 
air pressure
144
In physics, power can be defined as
work/time
energy/efficiency
leverage/mass
friction/drag
 
work/time
145
The force acting on an object dropped from a building is
buoyancy
elastic recoil
gravity
equilibrium
 
gravity
146
If you remove your foot from the gas pedal in ur car, it will slowly coast to a stop. The force...
 
friction
147
If a driver wheel is present, the adjacent wheels will rotate according to how _________ to...
 
close
The closer to the center, the faster it will move.
148
By increasing the length of the lever arm, the effort is increased, enabling a valve to blow...
 
b) moving the lever farther will cause less effort
NOTE: ...and lets the valve blow up at...
149
What is the formula to find the volume of a sphere?
 
4/3π r³
150
What is the formula to find the area of a sphere?
 
4 π r²
151
If two weights hang from two different strings attached to a bar, less pull is exerted by the...
 
b) the length of the string does not matter
152
The deeper you go with an inflated ball, the more difficult it is to hold it underwater. So...
 
b) will increase, depending on how deep you go into the water
153
Rate of heat exchange is _____ through objects of greater temperature difference
slower
the...
 
faster
154
Think about putting your thumb on the end of a hose makes the water spray.
a) water flows...
 
c) all of the above
155
This kind of engine consists of an intake, compression, combustion, and exhaust.
2 stroke
4...
 
4 stroke
156
What is the mechanical advantage of a wheel and axle?
 
radius of axel to handle divided by the radius of the drum
radius(axel to handle)/radius(drum)
157
Statics and EquilibriumFormula for a moment?
 
Force * distance
158
________ energy is stored in an object while _________ energy is energy in motion.
Kinetic,...
 
Potential, Kinetic
159
I = Q/T
Define I, Q, T

Current, charge, time
Voltage, momentum, time
Voltage,...
 
Current, charge, time
160
This device measures the current flow in a circuit
Ammeter
Voltmeter
Multimeter
 
Ammeter
161
This device measures does the job of both measuring the flow in a current and the voltage
Ammeter
Voltmeter
Multimeter
 
Multimeter
162
The formula for Power is
 
Power = volts * amperes
163
Units for a charge is
coulomb, C
ampere, A
volts, V
watts, W
 
coulomb, C
164
Units for current flow are
coulomb, C
ampere, A
volts, V
watts, W
 
ampere, A
165
Vise
MA = (2*pi*length of handle) divided by what?

 
pitch of thread
166
Formula of Weight is
Mass * Gravity
Gravity is equal to

9.81 m/s²
32.3 ft/s²
22.1...
 
9.81 m/s²
All the other answers are off by 0.1 only.
32.2 ft/s²
22 mph
167
The formula for Density is
 
Mass / Volume
168
The formula for Relative Density is
 
Density / Density(Reference Material)
169
If you add salt into a liquid, the solution has a lower freezing point. This is because
a)...
 
a) there is an increase in specific gravity
Specific gravity usually means relative density...
170
Heat always

distributes between objects
travels from hot to cold

 
travels from hot to cold
171
Compressing air in a closed place will decrease the volume and raise the temperature
a)...
 
True
172
A square plate is hanging by 4 wires (one on each corner). One breaks, and it's hanging by...
 
b) the 2 diagonally across from each other hold an equal amount that is more than the lone...
173
Will an airplane with engine and propeller take off on a treadmill or converyor belt, regardless...
 

174
Will a glider (no engine or propeller) take off on a treadmill or converyor belt, regardless...
 

175
A common example of a first-class lever is
a seesawa wheelbarrowtongs
 
a seesaw
176
The force F required to balance the weight of 60 lbs on the lever, shown in the diagram above,...
 
210 lbs
177
The mechanical advantage shown is
4
5
8
 
5
178
What effort must be exerted to the handles of the wheelbarrow shown carrying a load of 200...
 
50 lbs
179
The bar, which is exactly 4 inches in length, has a 275 lbs weight on one end and a 125 lb...
 
1 1/4 inches
180
Neglecting friction, what is the mechanical advantage in using a single fixed pulley as shown...
 
1
181
In the figure shown, the pulley system consists of a fixed block and a moveable block. Neglecting...
 
50 lbs
182
The weight W is to be raised as shown in the figure by attaching the pull rope to the truck....
 
24 ft
183
The formula for an inclinded plane is
MA = L/H

MA = mechanical advantage
L = length
H...
 
H = height

MA = L / H
L = length
184
A gradual slope will provide a ________ mechanical advantage than a steep slope.
higher
lower
 
higher
185
In the figure shown, the service person is using a plank to roll a 300-pound barrel up to the...
 
100 pounds
186
How do you find the mechanical advantage for a wheel and axel?
 
Diameter/Radius
187
In the figure shown, a bucket is being raised by a wheel-and-axel arrangement. If the distance...
 
4
188
To make a 1/2" hole in a block of wood, use tool

A
B
C
 
B
189
To cut a thread on a 1/2" brass rod, use tool
A
B
C
 
A
190
The number 18 appearing on the tool shown above indicates

depth of opening
size of...
 
threads per inch
191
Which of the 1½ volt dry cell battery connections shown above will deliver 6 volts?
1
2
3
 
2
192
In the figure given, if the thickness of the wall of the pipe is ½", the inside diameter of...
 
3"
193
The figure above represents a revolving wheel. The numbers 1 and 2 indicate two fixed points...
 
c) points 1 and 2 make the same number of revolutions per minute
194
In the figure shown, if gear A makes 14 revolutions, gear B will make
14
17
21
 
21
195
With the wheels in the position shown in the figure
a) wheels S and T will rotate in opposite...
 
b) wheels S and T will rotate in the same directions
196
In order to open the valve four times every second, the wheel must rotate at
12 rpm
18...
 
24 rpm
4 times every second = 240
10 rods on the wheel
240/10
197
In the figure shown, a 160-lb individual jumps off an 800-lb raft to a point in the water 10...
 
a) 2 ft in the opposite direction
198
The figure shows a lever-type safety valve. It will blow off at a lower pressure if weight...
 
moved to the left
199
As shown in the figure, four air reservoirs have been filled with air by the air compressor....
 
100 lbs
200
In the figure above, the number of complete turns the vise handle must make to fully close...
 
18
201
In the figure shown, the center-to-center distance between the two poles is
1 3/4"
1...
 
1 15/16"
202
If an 8" level indicates 16 quarts of oil in the tank, then the number of quarts of oil to...
 
4 quarts
203
Which illustration depicts the compression stroke?
X
Y
Z
 
Z
Both valves are closed and the piston is moving upwards
204
What is the proper sequence of the four strokes of a piston in a gasoline engine
W X Y Z
X...
 
Y Z X W
205
The gauge shown above is a
depth gauge
feeler gauge
thread gauge
 
thread gauge
The thread or screw-pitch gauge is used to determine the pitch and number of...
206
The wrench shown is generally used when
a) a definite force must be applied to a nut or...
 
a definite force must be applied to a nut or bolt head
The torque is read visually on a...
207
Which of the figures shown is the proper procedure for pulling adjustable wrenches?
A
B
Both...
 
A
The handle of the adjustable wrench should be pulled toward the side having the ...
208
Every object in a state of uniform motion tends to remain in that state of motion unless an...
 
True
209
Newton's Law describes a  relationship between an object's _______ and _______ as the...
 
mass, acceleration
210
In Newton's Third Law, force
a) is neither created or destroyed
b) if there is no opposing...
 
c) always elicits an equal, opposite force acting against it
Whenever a first body exerts...
211
A 150 lb man jumps off a 600 lb raft to a point in the water 12 ft away. Theoretially, the...
 
3 ft in the opposite direction

150 lb x 12 ft = 600 lb x ? ft
212
The mechanical advantage of a lever can be increased by

a) placing the fulcrum closer...
 
d) both a and c
213
A lever arm is in balance when the force x length of one side of a fulcrum is equal to the...
 
10 lbs
214
Then tension of a string in figure A is greater than the tension of a single spring in Figure...
 
L) Three times greater than in B
215
Pulleys. Which of the following is always not true about a pulley.

a) a pulley...
 
e) all of the above
216
What amount of force is required to move the weight (assume the supported objects all weight...
 
50lbs
217
What amount of force is required to move the weight (assume the supported objects all weight...
 
33.3 lbs
218
What amount of force is required to move the weight (assume the supported objects all weight...
 
25 lbs
219
The immoveable one pulley system provides ___ the force to lift the object and will have a...
 
1/2

There is 1 rope. Divided evenly into 2, and no mechanical advantage, since the pulley...
220
If the pulley is immoveable, what is the minimum force that must be applied to position 1 in...
 
10.1 lbs over 3 ft
221
This is Boyles Law:

a) Compressing a gas to 1/2 volume doubles the pressure
b) If...
 
c) Both A and B

Actually, Boyle's law describes the inversely proportional relationship...
222
Charles' Law is when
a) you heat some liquid, and the temperature changes, but the volume...
 
b) you open a can of coke, and the soda starts fizzing out

If gas is held at a constant...
223
Bernoulli's Principal is when
a) a good pitcher throws a curve ballb) you siphon a gas tank
c)...
 
d) both a and b

Bernoulli's princiapl states that as the velocity of a fluid increases,...
224
The higher the altitude, the more dense the air.
True
False
 
False
225
The deeper an object is submerged, the more pressure is exerted upon it.
True
False
 
True
226
Which of the statements about weight are true?
a) Weight is the same closer to the earth's...
 
b) Weight is greater on planets with greater mass
Mass does not change and is not affected...
227
If Gear R is thedriver, at the moment shown, Gear S is
P) not moving
Q) jammed
R)...
 
T) moving in the opposite direction as Gear R
228
If Gear A makes 14 revolutions, gear B will make
A) 9 revolutions
B) 14 revolutions
C)...
 
D) 21 revolutions
229
_______  is the factor or ratio by which a mechanism multiplies the force or torque applied...
 
Mechanical Advantage
Output force
 Input force

or

distance...


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