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7.3
Test Description: Force Transformers in a Fluid System, Principles of Technology
Instructions: Answer all questions to get your test result.
1) In a hydraulic jack, work input equals work output is expressed as:
A
pi times delta Vi = po times delta Vo
B
pi times Qvi = po times Qvo
C
pi times Di = po times Do
D
pi times Fi = po times Fo
2) In a hydraulic jack, pressure is what throughout the system?
A
constant
B
don't pick me
C
varies
D
not the answer
3) In a hydraulic jack a volume of fluid is displaced at the input end and the output end to achieve mechanical advantage, is the fluid different, or the same?
A
no answer
B
no answer
C
same
D
different
4) The ideal mechanical advantage in a hydraulic jack is given by:
A
Do / Di
B
po/pi
C
delta Vo / delta Vi
D
Di/ Do
5) What the IMA of a hydraulic jack with an input force of 25 pounds that delivers an output force of 250 pounds to the load? Assume no friction
A
10
B
6250
C
50
D
0.1
6) In a pressure intensifier, while an area of piston face decreases from input ot output, output pressure does what from input to output?
A
varies
B
increases
C
decreases
D
stays the same
7) The handle of a hydraulic jack is
A
a first class lever
B
a fluid force transformer
C
a second class lever
D
a third class lever
8) A mechanical device that uses a fluid medium to amplify force is
A
a hydraulic jack
B
a pulley
C
a lever
D
a pressure intensifier
9) This uses fluids to amplify pressure
A
a pressure intensifier
B
a lever
C
a hydraulic jack
D
a pulley
10) A hydraulic jack is not truly a fluid force transformer, it is a mechanical device
A
true
B
no answer
C
no answer
D
false
*select an answer for all questions
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