FCTC Written Study Guide FCTC Mechanical

FCTC Written Study Guide FCTC Mechanical Latest Update - Questions and 100% Verified Correct Answers Guaranteed A+

Be mindful of questions with absolutes. What are some absolutes and why watch out for them? - CORRECT ANSWER: Examples of absolutes are "absolutely, always, forever, completely, infinite, never, only, sole, undeniable, or wholly".Absolutes or any sort of broad statements should be suspected as wrong.

Belt and Pulley Systems - CORRECT ANSWER: Two or more pulleys in common to a

belt. If the pulleys are of differing pitch diameters, a mechanical advantage is realized.Doesn't depend on ratio of teeth as with gears and sprockets, only pitch diameter.

Class 1 Levers - CORRECT ANSWER: Fulcrum is in the middle, with the effort (input) force on one side of the fulcrum and resistance (output) on the other side.Mechanical Advantage greater or less than 1

Ex: Seesaw, Crowbar, Pair of Scissors.

Class 2 Levers - CORRECT ANSWER: Resistance is in the middle, the effort is applied on one side of the resistance and the fulcrum on the other side.Mechanical Advantage always greater than 1

Ex: Wheelbarrow, nutcracker, bottle opener, or the brake pedal of a car.

Class 3 Levers - CORRECT ANSWER: Effort in the middle, the resistance is on one

side of the effort and the fulcrum is located on the other side.Mechanical Advantage always less than 1

Ex: Pair of tweezers, human mandible

Classes of Levers - CORRECT ANSWER: Class 1, Class 2, Class 3

For a Rope and Pulley System that is a Block and Tackle, is characterized by: -

CORRECT ANSWER: * If rope does not dissipate or store energy, then it's mechanical advantage is the number of parts of the rope that act on the load.

• if the anchor knot is at the load ("A", "D", and "E") then mechanical advantage will be

odd.(1:1, 3:1, 5:1, etc.)

• if the anchor knot is at the anchor ("B", "C") then mechanical advantage will be even.

(2:1, 4:1, 6:1, etc.)

• to calculate haul distance, multiply the distance need to go by the mechanical

advantage. (3:1 ratio, 20 ft to haul, multiply 3 x 20 ft to get total of 60ft) 1 / 2

Formula for Determining the head pressure difference between an intake and output -

CORRECT ANSWER: 1 vertical foot = 0.433 psi

• psi = 2.31 vertical feet

Gear Train, or commonly called "Transmission" - CORRECT ANSWER: Two or more gears working in a sequence, producing mechanical advantage through a gear ratio.

Lever Definitions - CORRECT ANSWER: Lever machine consisting of a beam or rigid

rod pivoted at a fixed hinged, or fulcrum.Input Force = Effort Output Force = Load or Resistance

Overall Test Overview: - CORRECT ANSWER: 1) 30 minute period to read 2 essays

• 2 hour time limit begins to answer (100 questions).

2) Watch 2 short videos and answer (20 questions) based on the scenarios.3) Apply mechanical reasoning (25 questions, i.e. Fluid Dynamics, levers, belt and pulleys, gears) 4) Mathematical Problems (20 questions, i.e. addition, division, angles, area, volume, decimals, ratios, percentages) 5) Recall and Comprehend Technical Information (35 questions, recall from first two essays, in addition to one or two more at this time)

Recall and Comprehend Technical Information - CORRECT ANSWER: - Read one to

four essays

• 35 questions total (including questions for essays in back of test booklet)
• notes can be written on the essay packet, NOT any other testing material.
• 15 - 20 questions from these essays handed out in first 30 minutes.

Recall and Comprehend Verbal and Visual Information: - CORRECT ANSWER: - 20 questions total

• Watch 2 short videos
• Answer 7 - 10 questions per video
• Bases off of what is heard and seen in the videos.

- NO NOTE TAKING DURING THIS TIME

• Videos will only be played once.

Relationship between Speed, Torque, and Power: - CORRECT ANSWER: Power = 2pi x Speed (w) x Torque (nm)/ 60 Torque = 60 x Power (kW)/2pi x Speed (Rpm)

What does "fre, 123" mean? - CORRECT ANSWER: Fulcrum is in the middle for Class

• Levers

Resistance (output) in middle for Class 2 Effort (input) in the middle for Class 3

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