AMTS Fall Final Review- Physics (Rod's)
Quiz
•
Physics
•
12th Grade
•
Hard
Sophia Rodriguez
Used 4+ times
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21 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a double-acting actuating cylinder in a 3,000 psi hydraulic system has a piston with a surface area of 3 in² on the extension side, & a rod with a cross-section area of 1 in² attached to the piston on the other side, approximately how much force will the actuator be able to produce when retracting?
A- 9,000 pounds.
B- 6,000 pounds.
C- 3,000 pounds.
Answer explanation
Think Pascal’s Law(triangle): whenever you are finding area, force or pressure of a hydraulic system
The force a hydraulic actuator can exert is determined by the effective area of the piston & the pressure of the fluid acting on the piston.
The effective area on the retracting side of the piston is 2 in2 …
effective area = (extension side - other side)
2 in2 x 3,000 psi = 6,000 pounds of force
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The boiling point of a given liquid varies
A- directly with pressure.
B- inversely with pressure.
C- directly with density.
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following is NOT considered a method of heat transfer?
Convection.
Conduction.
Diffusion.
Radiation
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which condition is the actual amount of water vapor in a mixture of air and water?
Relative humidity.
Dewpoint.
Absolute humidity.
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present, if the air were saturated at the prevailing temperature and pressure?
A- Absolute humidity.
B- Relative humidity.
C- Dewpoint.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The speed of sound in the atmosphere is most affected by...
variations in the frequency of the sound.
changes in
temperature.
changes in
pressure.
Answer explanation
Air molecules have more energy at higher temperatures, which means they vibrate faster.
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
If the temperature of a confined liquid is held constant & its pressure is tripled, the volume will...
triple
be reduced to one-third its original volume.
remain the same.
Answer explanation
**Liquids are incompressible. So, if the pressure is
tripled the volume will not change...
*as long as temperature stays constant
-increasing the temperature will change some of the liquid to gas & gases are compressible
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