FCTC WRITTEN EXAM 2023 -2024 100

FCTC WRITTEN EXAM 2023 -2024 100

QUESTIONS AND CORRECT DETAILED ANSWERS

WITH RATIONALES ( ANSWERS)

What does "fre, 123" mean? - ANSWER- Fulcrum is in the middle for Class 1 LeversResistance (output) in middle for Class 2Effort (input) in the middle for Class 3

Formula for Determining the head pressure difference between an intake and output - ANSWER- 1 vertical foot = 0.433 psi

• psi = 2.31 vertical feet

Overall Test Overview: - 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)

Be mindful of questions with absolutes. What are some absolutes and why watch out for them? - 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.

Recall and Comprehend Technical Information - ANSWER- - Read one to four essays -35 questions total (including questions for essays in back of the test booklet)

• notes can be written on the essay packet, NOT any other testing

material.

• 15 - 20 questions from these essays were handed out in the first

30 minutes.

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

Relationship between Speed, Torque, and Power: - ANSWER- Power =

2pi x Speed (w) x Torque (nm)/ 60 Torque = 60 x Power (kW)/2pi x Speed (Rpm)

Belt and Pulley Systems - 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.Classes of Levers Class 1, Class 2, Class 3

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

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

Class 3 Levers Effort in the middle, the resistance is on one side of the effort and the fulcrum is located on the other side.Mechanical Advantage is always less than 1

Ex: Pair of tweezers, human mandible

Lever Definitions Lever machine consisting of a beam or rigid rod pivoted at a fixed hinged, or fulcrum.Input Force = Effort Output Force = Load or Resistance

What does "fre, 123" mean?Fulcrum is in the middle for Class 1 LeversResistance (output) in middle for Class 2Effort (input) in the middle for Class 3

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

• vertical foot = 0.433 psi
• psi = 2.31 vertical feet

Overall Test Overview:

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)

Be mindful of questions with absolutes. What are some absolutes and why watch out for them?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.

Recall and Comprehend Technical Information

• Read one to four essays

-35 questions total (including questions for essays in back of the test booklet)

• notes can be written on the essay packet, NOT any other testing

material.

• 15 - 20 questions from these essays were handed out in the first 30

minutes.

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

Relationship between Speed, Torque, and Power:

Power = 2pi x Speed (w) x Torque (nm)/ 60 Torque = 60 x Power (kW)/2pi x Speed (Rpm)

Belt and Pulley Systems 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.

What is a pulley (also called a "sheave" or "drum")