FCTC TEST PREP EXAM QUESTIONS

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FCTC TEST PREP EXAM QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -28 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: 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

Question 2: Why are pulleys used?

Answer:

lift loads apply forces trasmit power

Question 3: What is the mechanical advantage of a Class 2 lever?

Answer:

It is always greater than 1 Question 4: Examples of Class 1 levers:

Answer:

see saw, crowbar, scissors

Question 5: How do levers work?

Answer:

amplifies an input force to provide a greater output force, which is said to provide leverage

Question 6: How is mechanical advantage realized?

Answer:

if the pulleys are different diameters

Question 7: what is the mechanical advantage of a lever?

Answer:

the ratio or the output force to the input force

Question 8: HEAD

Answer:

pressure created by the force of gravity and is a function of the difference in elevation between intake and output

Question 9: Head is usually measured in

Answer:

pounds per square inch

Question 10: 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.Question 11: Examples of Class 2 levers:

Answer:

Wheel barrow, a nutcracker, a bottle opener or the brake pedal of a car

Question 12: What is a lever?

Answer:

a machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum

Question 13: Examples of Class 3 levers

Answer:

tweezers or the human mandible Mechanical advantage is always less than 1

Question 14: 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.Question 15: 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.

Question 16: Formula for determining head pressure

Answer:

• vertical foot= 0.433 pounds / square inch
• PSI = 2.31 vertical feet

Question 17: 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.Question 18: 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

Question 19: FRE 123

Answer:

Fulcrum in middle for 1st class Resistance is in the middle for the 2nd lever Effort is in the middle for the 3rd

Question 20: What is usually the drive element of a pulley?

Answer:

rope, cable, belt or chain that runs over the pulley inside the groove

Question 21: What is the mechanical advantage of a Class 1 lever?

Answer:

It may be greater than or less than 1 Question 22: 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

Question 23: Pulleys are assembled to form what

Answer:

a block and tackle in order to provide mechanical advantage to apply large forces

Question 24: Water head pressure is

Answer:

Static pressure caused by the weight of water solely due to its height above the measuring point.Question 25: 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

Question 26: 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.