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FCTC TEST PREP LATEST 2025 ACTUAL EXAM|
COMPLETE REAL EXAM QUESTIONS WITH
CORRECT VERIFIED ANSWERS/ ALREADY
GRADED A+| FCTC TEST PREP 2025 (NEW!!)
what is a pulley? - ANSWER - a wheel on an axle or shaft that is designed to support movement and change of direction of a cable or belt along its circumference
Why are pulleys used? - ANSWER - lift loads apply forces transmit power
What is usually the drive element of a pulley? - ANSWER - rope, cable, belt or chain that runs over the pulley inside the groove
Pulleys are assembled to form what - ANSWER - a block and tackle in order to provide mechanical advantage to apply large forces
rope and pulley systems (block and tackle) are characterized by what? - ANSWER - the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load the rope may be a light line or a strong cable
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pg. 2 What is the mechanical advantage of a rope and pulley system if it does not dissipate or store energy? - ANSWER - the number of parts of the rope that act on the load
What is a lever? - ANSWER - a machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum
How do levers work? - ANSWER - amplifies an input force to provide a greater output force, which is said to provide leverage
what is the mechanical advantage of a lever? - ANSWER - the ratio or the output force to the input force
How are levers classified? - ANSWER - by relative positions of the fulcrum and the input and output forces.allows identification by the relative locations of the fulcrum, the resistance, and the effort.
What is the heat capacity of water? - ANSWER - 4.18
is when a solid change to a vapor without forming a liquid. - ANSWER - sublimation
Class 1 Lever - ANSWER - Fulcrum in the middle the effort is applied on one side of the fulcrum and the resistance on the other side. 2 / 4
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Examples of Class 1 levers: - ANSWER - see saw, crowbar, scissors
What is the mechanical advantage of a Class 1 lever? - ANSWER - It may be greater than or less than 1
Class 2 Lever - ANSWER - Resistance in the middle.Effort is applied on one side of the resistance and the fulcrum is located on the other side.
Examples of Class 2 levers: - ANSWER - Wheel barrow, a nutcracker, a
bottle opener or the brake pedal of a car
What is the mechanical advantage of a Class 2 lever? - ANSWER - It is always greater than 1
Class 3 Lever - ANSWER - 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 3 levers - ANSWER - tweezers or the human mandible Mechanical advantage is always less than 1
FRE 123 - ANSWER - Fulcrum in middle for 1st class Resistance is in the middle for the 2nd lever 3 / 4
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pg. 4 Effort is in the middle for the 3rd
HEAD - ANSWER - pressure created by the force of gravity and is a function of the difference in elevation between intake and output
Head is usually measured in - ANSWER - pounds per square inch
Formula for determining head pressure - ANSWER - 1 vertical foot= 0.433 pounds / square inch
- PSI = 2.31 vertical feet
Water head pressure is - ANSWER - Static pressure caused by the weight of water solely due to its height above the measuring point.
What is greater? the pressure of a 40' lake or a 40' high thin tube filled with water? - ANSWER - they will be identical since only height is involved.
Basic water head calculation: - ANSWER - 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
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