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FCTC WRITTEN EXAM PRACTICE
QUESTIONS WITH 100% CORRECT ANSWERS
NEW MODIFIED EXAM TESTED AND
APPROVED!!!
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.
What is a pulley (also called a "sheave" or "drum") -- ANSWER--A pulley is a
wheel on an axle or shaft that is designed to support movement and change in
direction of a belt or cable along its circumference.
For a Rope and Pulley System that is a Block and Tackle, is characterized by: --
ANSWER--* If the rope does not dissipate or store energy, then its 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 the mechanical
advantage will be odd. (1:1, 3:1, 5:1, etc.)-
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if the anchor knot is at the anchor ("B", "C") then the 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 a total of 60ft)
How much water can be held in engine 17 water tank -- ANSWER--105 feet Sq
How many gallons with a tank of 12 ft diameter hold if it is 5 feet deep --
ANSWER--4320
Engine carries lots of hose. 4" was removed -- ANSWER--30% left
How many acres were burned -- ANSWER--6.88 acres
How many cubic feet of water can a captain expect the tank to hold --
ANSWER--1385
What is the total percentage of the body burned -- ANSWER--22..5
, Classes of Levers -- ANSWER--Class 1,
Class 2,
Class 3
Class 1 Levers -- 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 -- 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 is always greater than 1
Ex: Wheelbarrow, nutcracker, bottle opener, or the brake pedal of a car.
Class 3 Levers -- 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 is always less than 1
Ex: Pair of tweezers, human mandible
FCTC WRITTEN EXAM PRACTICE
QUESTIONS WITH 100% CORRECT ANSWERS
NEW MODIFIED EXAM TESTED AND
APPROVED!!!
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.
What is a pulley (also called a "sheave" or "drum") -- ANSWER--A pulley is a
wheel on an axle or shaft that is designed to support movement and change in
direction of a belt or cable along its circumference.
For a Rope and Pulley System that is a Block and Tackle, is characterized by: --
ANSWER--* If the rope does not dissipate or store energy, then its 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 the mechanical
advantage will be odd. (1:1, 3:1, 5:1, etc.)-
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if the anchor knot is at the anchor ("B", "C") then the 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 a total of 60ft)
How much water can be held in engine 17 water tank -- ANSWER--105 feet Sq
How many gallons with a tank of 12 ft diameter hold if it is 5 feet deep --
ANSWER--4320
Engine carries lots of hose. 4" was removed -- ANSWER--30% left
How many acres were burned -- ANSWER--6.88 acres
How many cubic feet of water can a captain expect the tank to hold --
ANSWER--1385
What is the total percentage of the body burned -- ANSWER--22..5
, Classes of Levers -- ANSWER--Class 1,
Class 2,
Class 3
Class 1 Levers -- 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 -- 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 is always greater than 1
Ex: Wheelbarrow, nutcracker, bottle opener, or the brake pedal of a car.
Class 3 Levers -- 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 is always less than 1
Ex: Pair of tweezers, human mandible
