Asvab Test 35 - Mechanical Comprehension

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

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 Inclined planes are not useful implements and have been replaced by more effective methods of transportation.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

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 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. The load should be placed closer to one end to prevent bowing of the plane.

A string of six gears exists, with each gear turning in conjunction with one another. Which gears operate in the same rotation?. Gears 1, 2, and 3. Gears 1, 3, and 5. Gears 3, 4, and 5. Gears 2, 4, and 5.

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

What is the definition of a "concurrent force"?. A force system requiring concurrent movement. 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.

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

Which of the following materials serves as a conductor?. Metal. Wood. Acrylic. Paper.

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

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

Pulley systems require the synchronized movement of all pulleys. How can pulleys escape this rule?. To violate this rule, pulley systems may be used in conjunction with gears. This rule cannot be effectively violated. To violate this rule, pulley system belts must be reversed. Pulleys using twisted belts may move in opposing directions.

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.

What determines the speed of an output gear?. None of these (Gear speed is not capable of alteration.). The size of gears. The speed of the input gear and the ratio of the number of teeth on each gear. The ratio of companion gears.

What are the potential functions of gear systems?. Gears may be used to change direction in machinery and can be used to increase speed. 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 are primarily used for making changes in speed, but may also be used to instigate motion in machinery.

If a mechanical device is reported to have an advantage of 2, what does this mean?. The number "2" describes the effectiveness of the machine. 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.

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 pulley system. A lever. A ramp. A series of gears.

How can workers increase the mechanical advantage of pulley systems?. Using longer stretches of rope. Using a higher platform for the load in need of lifting. Using additional pulleys to further distribute weight. Decreasing load size and weight.

The best definition for drag is __________. a responsive force that affects the movement of an object through a fluid. a responsive force that only affects movement on a solid. a responsive force that only affects movement in air. the internal stretch force of a material.

Which of the following is an example of a Class 1 Lever?. Pliers. Wheelbarrow. Tongs. Stapler.

Which of the following will happen when a mass of air contracts?. The air remains at the same temperature. The air gets colder. The air gets warmer. The air moves faster.

Which of the following would feel hottest at one end if the other end were placed over a fire?. A metal skewer. A wooden stick. A plastic rod. A rubber stick.

If you use a lever to lift a 200 pound weight with an effort of 40 pounds, with is the mechanical advantage?. 4. 0.2. 8,000. 5.

Water flows into a container at a rate of 140 gallons per minute. The container has a small opening at the bottom that drains water at a rate of 1 gallon per second. How long will it take to fill the container to 240 gallons?. 2 min. 3 min. 4 min. Not enough information.

Which of the following statements is true for water flowing from a 4 inch pipe to a smaller 2 inch pipe?. The same amount of water passes through both the 4 inch pipe and the 2 inch pipe. The pressure is greater in the 2 inch pipe. More water passes through the 4 inch pipe than through the 2 inch pipe. The pressure is lower in the 4 inch pipe.

What is the mechanical advantage of this pulley system?. 6. 4. 3. 2.

In the figure below, if gear A turns 15 times, how many revolutions will gear B make?. 15 revolutions. 5 revolutions. 30 revolutions. 45 revolutions.

Pulling on the rope at point A will lift the load. How far will you have to pull the rope at point A to lift the load 15 feet?. 15 feet. 45 feet. 30 feet. 60 feet.

In the figure below, if gear 1 turns counterclockwise (as shown by the arrow), which of the gears will also turn in the same direction?. 2 and 4. 2 and 3. 3 and 4. 4.

In the pulley system below, how fast does pulley D rotate, if pulley A rotates at 50 rpm?. 100 rpm. 50 rpm. 200 rpm. 64 rpm.

Which of the following is an example of a Class 2 Lever?. Fishing rod. Bottle opener. See-Saw. Scissors.

Which of the following is not a type of simple machine?. Pulley. Spring. Lever. Screw.

In the pulley system below, how fast does pulley D rotate, if pulley A rotates at 100 rpm?. 25 rpm. 50 rpm. 100 rpm. 12.5 rpm.

What weight (X) is needed to balance the two loads shown in the figure below?. 15 lbs. 10 lbs. 5 lbs. 7.5 lbs.

The diagram below represents a load sliding down an incline. Which of the forces (A,B,C, or D) represent friction?. A. B. C. D.

On a bicycle there are 30 teeth on the gear sprocket connected to the pedals, and 10 teeth on the sprocket connected to the rear wheels. If you pedal the bike 12 times, how many times will the rear wheel turn?. 4 times. 12 times. 24 times. 36 times.

An axe is an example of what type of simple machine. Lever. Inclined plane. Wedge. None of the above.

When a football is thrown upwards in the air, what causes it to arc back towards the ground?. Centrifugal force. Gravity. Friction. Wind resistance.