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FCTC TEST PREP EXAM QUESTIONS WITH 100% SCORES
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- FCTC TEST PREP EXAM QUESTIONS WITH 100% SCORES
FCTC TEST PREP EXAM QUESTIONS WITH 100% SCORES
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FCTC TEST PREP EXAM QUESTIONS WITH100% SCORES
A belt and pulley system is characterized by - -two or more pulleys in
common to a belt.
-Basic water head calculation: - -Measure the height of the water above the
desire measuring point in inches or feet.
Divide the depth in inches by 27.21 inches/psi or the depth in feet by 2.31
feet/psi which are the english unit conversion factors
Result is water head pressure expressed in PSI
-Class 1 Lever - -Fulcrum in the middle
the effort is applied on one side of the fulcrum and the resistance on the
other side.
-Class 2 Lever - -Resistance in the middle.
Effort is applied on one side of the resistance and the fulcrum is located on
the other side.
-Class 3 Lever - -Effort in the middle
The resistance is on one side of the effort and the fulcrum is located on the
other side.
-Examples of Class 1 levers: - -see saw, crowbar, scissors
-Examples of Class 2 levers: - -Wheel barrow, a nutcracker, a bottle opener
or the brake pedal of a car
-Examples of Class 3 levers - -tweezers or the human mandible
Mechanical advantage is always less than 1
-Formula for determining head pressure - -1 vertical foot= 0.433 pounds /
square inch
1 PSI = 2.31 vertical feet
-FRE 123 - -Fulcrum in middle for 1st class
Resistance is in the middle for the 2nd lever
Effort is in the middle for the 3rd
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