63. The unit for mass in the SI system is
_.
a.
lbs
b.
lbmass c.
kg
d.
N
d.
Kilogram
64. _ is a measure of the earths
gravitational pull on the object.
a.
Mass
b.
Weight c.
Scalar
65. Torque equals the applied force times the lever
arm. What would the tor
31. Pressure in fluid systems is defined as
_.
a.
force times the area upon which the
force acts
b. force divided by the area upon which the force acts
c. force time the volume of the fluid
d. force divided by the volume of the fluid
32. _ must exist betw
37. The term, 115-volt AC, 60 Hz, means that the
voltage is 115 volts at he the alternating current
_.
a.
alternates or cycles 60 times per
second
b. changes direction 120 times per second
c. has a frequency of 60 cycles per second
d. all of these
38. Hea
42. When two forces of different magnitude act on
an object in opposite directions, the object is in
_.
a.
a balanced
b.
condition
an unbalanced
condition
43. A net force of zero means that all forces acting
on an object create_.
a.
a balanced
b.
conditio
48. The torque exerted on the driven gear in the
following diagram is _. (Remember
T = FL.)
a.
b. 40 lbft
22 lbft
c.
d. none of these
10 lbft
49. The torque of a system whose force (F) is 30 lbs
and length (L) is 2 ft is _.
a.
60 lbs
b.
15 lbs
c.
60 lbft
52. Heat moves _.
a.
from cool areas to b.
from warm areas
warm areas
to cool areas
53. Weight can be measured with _.
a.
a spring scale
c.
a triple-beam
balance
d. a graduated cylinder
b. a ruler
54. The amount of matter that a certain object
contains is
Multiple Choice
Identify the choice that best completes the statement or answers the question.
26. When we use the English
system of units, mechanical
force is measured in pounds.
When we use metric (or SI)
units, mechanical force is
measured in
_.
a.
New
Practice Mid Year 2010
True/False
Indicate whether the statement is true or false. On the answer sheet let A represent True and B
represent False.
1. Weight is a measure of mass.
2. Torque is rotation only in the counter clockwise (ccw) direction.
3. Belt
A car maintains a speed of 60 miles per hour for 5 hours. How many miles will the car have
traveled?
A car moves 55 meters in 10 seconds. Find the linear speed of the car.
A car accelerates from stop to 10m/sec in 2 sec. Whats the cars acceleration?
Use .
234. A weight of 10 N displaces a piston filled with air 0.1 m. If the change of
volume in the piston is 0.05 m3, what is the pressure in the piston?
(Hint: .)
(The piston is 100 % efficient.)
235. What is the efficiency of a machine that has a work input
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18. The atmospheric pressure at sea level is 14.7 lb/in
19. Liquids or gasses move in a fluid system when pressure difference exit between
different points in the system.
20. The electrical forces rule of attraction is like charges attrac