Mechanical Comprehension

Question 1 of 30

What is Newton’s Third Law of Motion?

What goes up must come down.
Reactions are a result of large actions.
Mass cannot be destroyed.
For every action, there is an equal and opposite reaction.

Question 2 of 30

The term equilibrium is defined as .

the state in which opposing forces are balanced
the principle describing the notion that every action must have a reaction
the state in which similar forces attract, causing a swell of movement in a single direction
the presence of motion in the present day which serves as a means of understanding movement as a whole

Question 3 of 30

What is the definition and the danger of recoil?

To recoil is to respond in fear, and it is dangerous because engineers and workers need to remain in control. Losing control could result in serious injuries on the job.
Recoil is the concept of “kicking back” or leaping back after being released. It may be dangerous due to the possibility of injury upon having equipment “leap back” rapidly.
To recoil is to move quickly and efficiently, and it is not dangerous but desired.
To recoil is to feel revolted or disgusted, and it is dangerous because it creates job dissatisfaction.

Question 4 of 30

Another word or phrase for false gravity is .

friction
tension
Newton’s Law
centrifugal force

Question 5 of 30

The phrase “to adopt power” means when working.

to work authoritatively and with a slim, fit physique
to use a forceful tone when discussing work with a coworker
to focus energy on the lesser objects before moving on to larger instincts
to increase speed and efficiency to become your absolute best

Question 6 of 30

A should be applied if gear shafts are not parallel to one another.

third gear
shifting gear
stopping gear
bevel gear

Question 7 of 30

What is the advantage of using wheels and axles?

Wheels and axles create a more effective conveyor belt effect.
Wheels and axles are not beneficial.
Wheels and axles are responsible for bearing the brunt of difficult lifting.
Wheels and axles provide greater power, enabling workers to achieve greater results with less effort.

Question 8 of 30

What is the function of a vise in mechanical applications?

In mechanical applications, vises are used to arrest motion.
Vises are used to suspend quick movements, slowing the effects of conveyor belts.
In mechanical applications, vises are designed to assist movement.
Vises are designed to function as a source of stability, much like how legs function beneath a table.

Question 9 of 30

A hydraulic jack performs the task of moving objects by .

pressing together two interfacing parts to increase height
using a corkscrew-like effect to function
utilizing oil; because oil cannot be compressed, pressure is placed upon the oil, resulting in a lifting motion
using a pulley system to lift items

Question 10 of 30

Which of these statements about force is correct?

The amount of force required to move an object depends only on the weight of the object in question.
The amount of force required to move an object does not depend on frictional conditions and cannot and will not exceed the weight of the object in question.
Force is best used in levered applications.
The amount of force required to move an object depends on the frictional forces between the object and its surroundings and must be calculated entirely based on individual situations.

Question 11 of 30

The purpose of mechanical comprehension is .

to determine how to adequately use mechanic’s tools
to inform workers on the proper use and function of machines
to describe the training undergone by car mechanics
to learn the use of various mechanisms

Question 12 of 30

What is the primary difference between distillation and evaporation?

One is intentional in scope, while the other occurs during other practices.
Distillation and evaporation have no primary difference; they are the same process.
Distillation separates or purifies liquids, while evaporation changes the form of a substance.
Distillation involves the use of implements, while evaporation only requires heat.

Question 13 of 30

What is the state known as equilibrium?

Equilibrium describes the state in which two different items possess equal force, resulting in balance.
Equilibrium describes the state created by the coming together of parallel forces.
Equilibrium describes the action of two opposing forces coming together in a crash.
Equilibrium describes the action of two similar forces coming together.

Question 14 of 30

What purpose does an inclined plane serve?

Inclined planes are tilted surfaces designed to assist in suspension.
Inclined planes are not useful implements and have been replaced by more effective methods of transportation.
An inclined plane is a tilted surface designed to aid in supporting or transporting a load.
An inclined plane is intended to aid only in unloading merchandise.

Question 15 of 30

If two workers are carrying a single load with the assistance of a board or plane, how should the load be placed to ensure an entirely equitable division of effort?

The load should be placed the same length from one side as the load is long; i.e. if the load is 3 feet wide, it should be placed 3 feet from the edge of the plane.
The load should be placed closer to one end to prevent bowing of the plane.
The load should be placed directly in the middle of the board or plane to ensure equal labor division between workers.
The cargo should be held directly, rather than placing strain on a board or plane.

Question 16 of 30

A string of six gears exists, with each gear turning in conjunction with one another. Which gears operate in the same rotation?

Gears 2, 4, and 5
Gears 1, 2, and 3
Gears 1, 3, and 5
Gears 3, 4, and 5

Question 17 of 30

Which is the best description of centrifugal force?

the force responsible for the changes made to water during distillation
the relationship between two opposing forces
the force by which bodies are propelled forward
the response of bodies with inertia to the straight-moving or curved behavior of their container

Question 18 of 30

What is the definition of a “concurrent force”?

A force system described as having multiple sources of force
A system requiring all systems to pass through the same point
A series of forces requiring simultaneous movement
A force system requiring concurrent movement

Question 19 of 30

How does oil function in a machine with a series of moving parts?

Oil serves as a fuel for moving parts in a machine.
Oil functions as a cleaning agent, allowing all moving parts to remain free of dirt and grime.
Oil provides a source of power when paired with fire.
Oil functions as a source of lubrication, allowing moving parts to function as a single unit.

Question 20 of 30

Which of the following materials serves as a conductor?

Wood
Paper
Acrylic
Metal

Question 21 of 30

To move an object across a surface, which system requires little input from the user, yet creates extreme force?

A conveyor belt, as those found in factories
wheel and axle system, as found in vehicles
A pulley system, as might be found in warehouses and shipyards
Any form of mechanical device

Question 22 of 30

What determines the speed of a pulley system?

The size and ratio of all pulleys involved
The material used as the belt (such as leather and rubber)
The size of the pulleys as a whole
The length of the rope or belt used in the pulley system

Question 23 of 30

Pulley systems require the synchronized movement of all pulleys. How can pulleys escape this rule?

Pulleys using twisted belts may move in opposing directions.
To violate this rule, pulley system belts must be reversed.
To violate this rule, pulley systems may be used in conjunction with gears.
This rule cannot be effectively violated.

Question 24 of 30

What are the three components of a lever?

Resistance arm and effort arm
A point of origin and solid plane
A wide plane, fulcrum, and effort arm
Fulcrum, resistance arm, and effort arm

Question 25 of 30

What determines the speed of an output gear?

the ratio of companion gears
the speed of the input gear and the ratio of the number of teeth on each gear
the size of gears
none of these (Gear speed is not capable of alteration.)

Question 26 of 30

What are the potential functions of gear systems?

Gears possess a single function: transmitting motion.
The potential functions of gears are: changes in direction, speed changes (both increases and decreases), and motion transmission.
Gears may be used to change direction in machinery and can be used to increase speed.
Gears are primarily used for making changes in speed, but may also be used to instigate motion in machinery.

Question 27 of 30

If a mechanical device is reported to have an advantage of 2, what does this mean?

This means the device allows users to complete twice the amount of work with the same amount of effort used to complete a task without assistance.
The number refers to the speed of the device in question.
This means that the device requires twice the amount of effort to complete the same amount of work.
The number “2” describes the effectiveness of the machine.

Question 28 of 30

An “inclined plane” is a commonly used implement and has many applications, including handicap access. What is the most common name for an inclined plane?

A series of gears
A lever
A ramp
A pulley system

Question 29 of 30

How can workers increase the mechanical advantage of pulley systems?

Using additional pulleys to further distribute weight
Decreasing load size and weight
Using a higher platform for the load in need of lifting
Using longer stretches of rope

Question 30 of 30

The best definition for drag is .

the internal stretch force of a material
a responsive force that only affects movement on a solid
a responsive force that affects the movement of an object through a fluid
a responsive force that only affects movement in air

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