Asvab Test 34 - Mechanical Comprehension

Force is something that can change the velocity of an object by making it __________. start or stop. speedup. slow down. all of the above.

The brakes on your car use the same force that stops your car if you just let it coast. This force is called ___________. velocity. gravity. friction. newton.

As the central shaft in the illustration below spins faster in a clockwise direction, the balls labeled A and B will ___________. move outward and downward. move outward and upward. move up. move down.

If you drop something, the force acting on it is ____________. gravity. friction. elastic recoil. equilibrium.

In the illustration below, if Pulley A is rotating in the direction indicated, then Pulley C will __________. rotate in the same direction as Pulley B. rotate in the same direction as Pulleys A and B. rotate in the opposite direction of Pulleys A and B. rotate in the same direction as Pulley A.

In the pulley system shown, which pulley will rotate the fastest?. Pulley A. Pulley B. Pulley C. They Will all rotate at the same speed.

Weight is directly proportional to the acceleration due to ___________. friction. elastic recoil. viscous drag. gravity.

The force that acts in an upward direction on anything submerged in a liquid or a gas is called __________. friction. viscous drag. gravity. buoyancy.

In the illustration below, two 30-lbs blocks are attached to the ceiling using ropes, as shown. Which of the following statements is true?. All the ropes are under equal amounts of tension. The rope supporting Block A is under 2x the tension of the ropes holding Block B. The ropes supporting Block B are under 1/3 of the tension of the rope holding Block A. The rope holding Block A is under 1/3 of the tension of the ropes holding Block B.

When the plug in the tube is removed, water will flow ___________. into the tube. out of the tube. neither direction. impossible to tell.

If an object is in equilibrium, it is said to be __________. at rest. moving. at rest or moving at a constant speed and in a straight line. moving upward only.

In the figure, the angle b is important, since when it is __________. 0 degrees the entire force is dragging the box. 90 degrees the entire force is lifting the box. both lifting and dragging between 10 degrees and 90 degrees. all of the above.

A good example of a simple machine is a __________. manually operated pencil sharpener. doorknob. light switch. all of the above.

Which weight exerts more pull on the horizontal bar from which both weights hang by strings as shown?. Block A. Block B. Both exert the same pull. Insufficient information to solve this problem.

In the water system shown below, assume that the main tank starts empty and that all the valves are closed. In order for the tank to fill about halfway and keep that level, which valves have to be open?. Valves A, B, and C. Valves A, B, and D. Valves A, E, and B. Valves A, E, and C.

Work input is always more than work output because of __________. gravity. buoyancy. friction. tension.

The ratio between work output and work input is called __________. efficiency. work. leverage. mass.

The amount of magnification that a machine produces is referred to as the __________. effort arm. work. mechanical advantage. efficiency.

A ramp is a device commonly used to aid in __________. lifting. lowering weights. high-efficiency situations. loading.

A screw consists of a single continuous spiral wrapped around a __________. piston. cylinder. helix. square.

If Pulley A is the driver and turns counterclockwise, which pulley will turn the slowest?. Pulley A. Pulley B. Pulley C. Pulley D.

The mechanical advantage of a winch is the ratio of the radius of the crank to the radius of the __________. arm. lever. fulcrum. shaft.

The ideal mechanical advantage of a gear is the ratio of the number of teeth in the load gear to the number of teeth in the __________. effort gear. loaded gear. lifting gear. spiral gear.

Which mechanical components are typically used between a wheel and an axle to reduce friction?. springs. hinges. bearings. levers.

A block of steel has a density of 0.29 pounds per cubic inch. If the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight?. 0.29 pounds. 0.58 pounds. 0.87 pounds. 1.0 pounds.

Which principle of mechanical motion is used in the design of a roller coaster?. momentum. friction. acceleration. all of the above.

Which term below best describes the OPPOSITE of an increase in speed?. rotation. deceleration. friction. velocity.

A valve is used to perform which of the following functions?. increase the temperature of a liquid. control the flow of a liquid. aid evaporation of a liquid. decrease the density of a liquid.

The sprocket on a bicycle is most similar to which of the simple mechanical devices listed below?. a gear. a spring. a lever. all of the above.

A pump is typically used to accomplish which of the following tasks?. to clarify liquids. to separate liquids. to move liquids downhill. to move liquids uphill.

In the diagram shown above, the spring is very stiff and can be stretched 1 inch by a pulling force of 100 pounds. How much force must be applied to the block in order to move the box 3.5 inches to the left?. 150 pounds. 250 pounds. 350 pounds. 450 pounds.

A concrete beam has a maximum strength of 3,000 psi (pounds per square inch). In an experiment, a 500-pound weight is placed in the center of the beam, and the stress in the beam is measured to be 1,000 psi. If the stresses in the beam continue to increase at the same rate with added weight, how much additional weight can be added to the same location on the beam before the beam will break?. 500 pounds. 1,000 pounds. 1,500 pounds. 3,000 pounds.

An elevator is most similar to which of the following mechanical devices?. a spring. a hydraulic jet. a lever. a crane.

There are three beams that are each 10 feet long and all of the same size. One is made of wood, another of steel, and the third of concrete. If identical loads are applied to these three beams, which of the following will occur?. The steel beam will deflect less than the wood beam. The wood beam will deflect less than the concrete beam. The wood beam will deflect less than the steel beam. The concrete beam will deflect more than the other two.

What mechanical motion principle do the brakes in a car or on a bicycle use?. friction. centrifugal force. momentum. acceleration.

The center of gravity of a baseball bat would be best described as __________. near the skinny end. at the top. near the fat end. near the grip.

Which material is best suited for use as a boat anchor?. foam. metal. wood. glass.

What would happen to a balloon full of air if you moved it from above a water surface to ten feet below the water surface?. The balloon would explode. The volume of the balloon would decrease. The volume of the balloon would increase. The volume of the balloon would stay the same.

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

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

What is the definition and the danger of recoil?. 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. 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.

Another word or phrase for false gravity is __________. tension. friction. centrifugal force. Newton's Law.

The phrase "to adopt power" means __________ when working. to increase speed and efficiency to become your absolute best. 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 work authoritatively and with a slim, fit physique.

A __________ should be applied if gear shafts are not parallel to one another. shifting gear. third gear. bevel gear. stopping gear.

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

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.

A hydraulic jack performs the task of moving objects by __________. utilizing oil; because oil cannot be compressed, pressure is placed upon the oil, resulting in a lifting motion. pressing together two interfacing parts to increase height. using a pulley system to lift items. using a corkscrew-like effect to function.

Which of these statements about force is correct?. 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. 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. The amount of force required to move an object depends only on the weight of the object in question. Force is best used in levered applications.

The purpose of mechanical comprehension is __________. to inform workers on the proper use and function of machines. to determine how to adequately use mechanic's tools. to learn the use of various mechanisms. to describe the training undergone by car mechanics.

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