ASVAB Mechanical Comprehension Practice Test 460371 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.43
Score	0%	69%

Review

1 If input effort is 400 ft⋅lb, what output effort will be produced by a machine with a mechanical advantage of 5?

79% Answer Correctly

	2000 ft⋅lb
	8000ft⋅lb
	80ft⋅lb
	4000ft⋅lb

Solution

Mechanical advantage is the ratio of output force to input force and tells us by how many times a machine multiplies input effort. So, a machine with a mechanical advantage of 5 will multiply an input effort of 400 ft⋅lb by 5 to produce an output effort of 2000 ft⋅lb.

Which of the following is not a type of structural load?

49% Answer Correctly

	live load
	dead load
	occupancy load
	wind load

Solution

Dead load is the weight of the building and materials, live load is additional weight due to occupancy or use, snow load is the weight of accumulated snow on a structure and wind load is the force of wind pressures against structure surfaces.

A wedge converts force applied to its blunt end into force __________ its inclined surface.

57% Answer Correctly

	along
	parallel to
	opposite to
	perpendicular to

Solution

The wedge is a moving inclined plane that is used to lift, hold, or break apart an object. A wedge converts force applied to its blunt end into force perpendicular to its inclined surface. In contrast to a stationary plane where force is applied to the object being moved, with a wedge the object is stationary and the force is being applied to the plane. Examples of a wedge include knives and chisels.

The steering wheel of a car is an example of which type of simple machine?

89% Answer Correctly

	block and tackle
	first-class lever
	fixed pulley
	wheel and axle

Solution

A wheel and axle uses two different diameter wheels mounted to a connecting axle. Force is applied to the larger wheel and large movements of this wheel result in small movements in the smaller wheel. Because a larger movement distance is being translated to a smaller distance, force is increased with a mechanical advantage equal to the ratio of the diameters of the wheels. An example of a wheel and axle is the steering wheel of a car.

What type of load is sudden and for a relatively short duration?

69% Answer Correctly

	dynamic load
	non-uniformly distributed load
	concentrated load
	impact load

Solution

A concentrated load acts on a relatively small area of a structure, a static uniformly distributed load doesn't create specific stress points or vary with time, a dynamic load varies with time or affects a structure that experiences a high degree of movement, an impact load is sudden and for a relatively short duration and a non-uniformly distributed load creates different stresses at different locations on a structure.