2–36.
The direction of rotation of gear G
is counterclockwise.
1.
True
2.
False
Use the following information to
o
compute the mechanical advantage of
textbook figure 6–1:
Gear A radius = 2
inches; Gear A teeth = 36; Gear B and C
teeth = 8; handle turn radius = 1 1/2
inches.
2–37.
The mechanical advantage of the
eggbeater is
1.
1/8
2.
1/6
3.
1/4
4.
1/2
2–38.
Refer to textbook figure 6-3B.
What is the function of this gear
arrangement if the pinion is
driving the internal gear?
1.
To increase speed
2.
To magnify force
3.
To change direction of motion
4.
To change rotary motion into
linear motion
2–39.
Refer to the left–hand half of
figure 6-12 in your textbook.
Which of the following statements
best describes the action of the
valve as the camshaft rotates 180°
from its position as shown in the
figure?
1.
The valve remains closed
2.
The valve opens and stays open
3.
The valve opens and then closes
4.
The valve opens and closes
twice
2–40.
A foot–pound is defined as the
amount of
1.
force developed by a one–pound
weight falling a distance of
one foot
2.
energy required to lift a one–
pound weight
3.
power required to overcome a
resistance of one pound
4.
work required to overcome a
resistance of one pound through
a distance of one foot
2-41.
Which of the following is an
example of work?
1.
Holding two pieces of glued
wood in a vise
2.
Rolling a barrel up a gangplank
3.
Changing water to steam
4.
Burning a log in a fireplace
2–42.
When you calculate the amount of
work you have done on an object,
the factors which you must always
measure are the
1.
resistance encountered and the
distance it is moved
2.
weight of the object and the
distance it is moved
3.
angle at which force is applied
and weight of the object
4.
time required to move the
object and resistance
encountered
2–43.
Assume that you must apply a force
of 150 pounds to overcome the
resistance of a crate weighing 350
pounds.
In moving the crate up an
inclined plane which is 12 feet
long, how much work do you do?
1.
4,200 ft–lb
2.
1,800 ft–lb
3.
350 ft-lb
4.
150 ft–lb
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