WIXLIB

250 ASVABMechanical ComprehensionPractice Test QuestionsASVAB Test Bankwww.asvabtestbank.com

CopyrightCopyright 2014 ASVAB Test Bank. All Rights Reserved. Thisdocument or any portion thereof may not be distributed or used in anymanner whatsoever without the express written permission of thepublisher.AffiliationASVAB Test Bank is a private non-governmental entity that is notassociated with or endorsed by the US Military or the Armed ServicesVocational Aptitude Battery (ASVAB) test.Question Source and Score CorrelationThe questions presented here are designed to help you study informationand concepts that are likely to be tested on the ASVAB and do notrepresent questions from the official ASVAB test. Your score on thispractice test is not meant to and will not correlate to any particular scoreon the official ASVAB test.Question AccuracyAlthough every effort has been made to provide accurate practice testquestions we make no express or implied warranties, endorsements, orrepresentations whatsoever as to the accuracy of the information in thistest or its suitability for any particular purpose.ASVAB Test BankTo answer these questions online and take practice tests from all 9ASVAB subtests head over to www.asvabtestbank.com.

250 ASVAB Mechanical ComprehensionQuestions1. Specific gravity is a comparison of the density of an object with thedensity of:A. AirB. WaterC. SteelD. Ice2. Velocity is:A. Speed in a particular directionB. Acceleration in a particular directionC. Acceleration over a particular distanceD. The scalar equivalent of acceleration3. f d is ?A. MomentumB. AccelerationC. WorkD. Equilibrium4.

If A 7 ft. and the green box weighs 5 lbs. what is the torque acting onthe A side of this lever?A. 17.5 ft. lb.B. 1 ft. lb.C. 35 ft. lb.D. 70 ft. lb.5. What force must you exert on the 14 in. radius handle of ajackscrew if the pitch is 0.25 in. and the weight of the load is 3,500 lb.?A. 5.0B. 62.5C. 19.9D. 9.96. What are gears between the first and last gears in a gear traincalled?A. Driver GearB. Connector GearC. Idler GearD. Driven Gear7. Connie lifts a 10 pound box from the floor onto a loading dock 5 ft.off the ground. Sam slides the same box along a ramp to move it upanother 5 ft. onto a flatbed truck. Who has done more work?A. ConnieB. Neither have done any workC. SamD. They have done an equal amount of work8.

Which of the following statements about this pulley configuration isfalse?A. Mechanical advantage is the number of ropes that support the resistanceB. Only multiplies the effort forceC. Consists of one or more fixed and one or more movable pulleysD. The effort distance is always more than the resistance distance9. A car travels 140 miles in 2.80 hours. What is it's velocity?A. There's not enough information to solve this problemB. 50 miles per hourC. 100 miles per hourD. 25 miles per hour10. Which of the following is not a modulus of elasticity?A. Stretch modulusB. Bulk modulusC. Shear modulusD. Stress modulus

11. If input effort is 800 ft. lb., what output effort will be produced bya machine with a mechanical advantage of 6?A. 0 ft. lb.B. 4,800 ft. lb.C. 9,600 ft. lb.D. 2,400 ft. lb.12.If a force applied at the blue arrow over 3 ft. moves the green box 0.33ft., what is the mechanical advantage of this lever?A. 36B. 4.5C. 9D. 2.2513.If this lever is in equilibrium with an effort force of 22.50 ft. lb. at theblue arrow and a resistance force of 9 ft. lb. at the green box, what isits mechanical advantage?A. 0.4B. 1.6C. 0.1D. 0.8

14. If input effort is 700 ft. lb., what output effort will be produced bya machine with a mechanical advantage of 4?A. 2,800 ft. lb.B. 0 ft. lb.C. 1,400 ft. lb.D. 175 ft. lb.15. What is the efficiency of a machine that has a work input of240 ft. lb. and a work output of 144 ft. lb. ?A. 16.67%B. 600%C. 0.6%D. 60%16.If the green arrow in this diagram represents1100 ft. lb. of work, how far will the box move if it weights 220 lbs. ?A. 10 ft.B. 5 ft.C. 1.25 ft.D. 2.5 ft.

17.Which of the following statements about this pulley configuration istrue?A. Has a mechanical advantage of more than 1B. Does not change the direction of the effortC. Does not multiply effortD. Has a mechanical advantage of less than 118. m v is ?A. WorkB. EquilibriumC. AccelerationD. Momentum19.Which of the following will increase the mechanical advantage of thisinclined plane?A. Lengthen the ramp lengthB. Increase the slope of the rampC. Shorten the ramp length

D. Increase the force acting at the blue arrow20. A car travels 40 miles in 0.53 hours. What is it's velocity?A. 150 miles per hourB. 37.5 miles per hourC. There's not enough information to solve this problemD. 75 miles per hour21. How much work can a 9 hp engine do in 8 seconds?A. 9 ft. lb.B. 4,950 ft. lb.C. 39,600 ft. lb.D. 9,900 ft. lb.22. How much work can a 1 hp engine do in a minute?A. 5,500 ft. lb.B. 3,300 ft. lb.C. 550 ft. lb.D. 33,000 ft. lb.23. What type of load varies with time or affects a structure thatexperiences a high degree of movement?A. Concentrated loadB. Impact loadC. Dynamic loadD. Nonuniformly distributed load24.If a 50 lb. weight is placed 7 ft. from the fulcrum at the blue arrow and

the green box is 4 ft. from the fulcrum, how much would the green boxhave to weigh to balance the lever?A. 875 lb.B. 43.75 lb.C. 175 lb.D. 87.5 lb.25. A man is using 10 lbs. of effort to lift a 90 lb. box. What is themechanical advantage in this situation?A. 0.11B. 9C. 2.25D. 1826. Which of the following is a ceramic?A. CopperB. PlasticC. NylonD. Clay27. m v is ?A. AccelerationB. EquilibriumC. MomentumD. Work28. Which of the following is not a type of simple machine?A. Wheel and axleB. CylinderC. WedgeD. Lever29.

If A 11 ft., B 2 ft., C 9 ft., the green box weighs 45 lbs. and theblue box weighs 65 lbs., what does the orange box have to weigh forthis lever to balance?A. 4.06 lb.B. 6.94 lb.C. 40.56 lb.D. 405.56 lb.30. Which of the following is not a type of structural load?A. Snow loadB. Wind loadC. Rain loadD. Dead load31.If the radius of the axle is 5" and the radius of thewheel is 6", what is the mechanical advantage of this wheel and axle

configuration?A. 5B. 6C. 65D. 5632. If input effort is 700 ft. lb., what output effort will be produced bya machine with a mechanical advantage of 4?A. 1,400 ft. lb.B. 2,800 ft. lb.C. 0 ft. lb.D. 175 ft. lb.33. Specific gravity is a comparison of the density of an object with thedensity of:A. SteamB. AirC. WaterD. Carbon34. How much resistance could a 80 lb. effort force lift using a blockand tackle pulley that has 10 ropes supporting the resistance?A. 8,000 lb.B. 800 lb.C. 80 lb.D. 80 lb.35.

The radius of the axle is 5", the radius of the wheel is10" and the blue box weighs 75 lbs. What is the effort force necessaryto balance the load?A. 18.75 lbs.B. 375 lbs.C. 3.75 lbs.D. 37.50 lbs.36. Which of the following is not a form of bridge?A. BeamB. SuspensionC. PulleyD. Truss37.If A 8 ft., B 1 ft., C 7 ft., the green box weighs 50 lbs. and the

blue box weighs 55 lbs., what does the orange box have to weigh forthis lever to balance?A. 6.50 lb.B. 49.29 lb.C. 4.93 lb.D. 65.00 lb.38. Depending on where you apply effort and resistance, the wheel andaxle can multiply:A. Force or distanceB. Power or distanceC. Force or speedD. Speed or distance39.This image represents what class of lever?A. ThirdB. SecondC. FirstD. Fourth40.If the green box is 18 ft. from the fulcrum and a certain force applied3 ft. from the fulcrum at the blue arrow balances the lever, what is themechanical advantage?

A. 3B. 1.5C. 12D. 641.If A 9 ft., B 3 ft., C 7 ft., the green box weighs 45 lbs. and theblue box weighs 55 lbs., what does the orange box have to weigh forthis lever to balance?A. 81.43 lb.B. 8.14 lb.C. 34.29 lb.D. 814.29 lb.42.Which of the following statements about this pulley configuration istrue?A. The pulley does not move with the resistance

B. Has a mechanical advantage of more than 1C. Work output never equals work inputD. Multiplies effort43. If the handles of a wheelbarrow are 3 ft. from the wheel axle, whatforce must you exert to lift the handles if it's carrying a 410 lb. loadconcentrated at a point 0.5 ft. from the axle?A. 0.33 lbs.B. 0.01 lbs.C. 68.3333333333 lbs.D. 3 lbs.44. Which of the following is not a modulus of elasticity?A. Stress modulusB. Bulk modulusC. Stretch modulusD. Shear modulus45. Which of the following is not a type of structural load?A. Snow loadB. Wind loadC. Dead loadD. Materials load46.

If the green arrow in this diagram represents 240ft. lb. of work, how far will the box move if it weights 60 lbs. ?A. 1 ft.B. 2 ft.C. 4 ft.D. 8 ft.47. A man is using 80 lbs. of effort to lift a 160 lb. box. What is themechanical advantage in this situation?A. 8B. 2C. 12800D. 448.If the green box weighs 20 lb. and is 9 ft. from the fulcrum, how muchweight would need to be placed at the blue arrow to balance the leverif the arrow's distance from the fulcrum is 6 ft.?A. 15 lb.

B. 3 lb.C. 300 lb.D. 30.0 lb.49. What is the efficiency of a machine that has a work input of155 ft. lb. and a work output of 93 ft. lb. ?A. 0.17%B. 60%C. 0.6%D. 600%50.Which of the following statements about this pulley configuration isfalse?A. Changes the direction of and multiplies the effort forceB. Mechanical advantage is the number of pulleys in the systemC. This is a block and tackle pulley configuration.D. Consists of one or more fixed and one or more movable pulleys

51.If the radius of the axle is 3" and the radius of thewheel is 8", what is the mechanical advantage of this wheel and axleconfiguration?A. 1B. 38C. 3D. 852. The mechanical advantage of a third class lever is always:A. Less than zeroB. Less than oneC. Greater than oneD. Equal to one53. What type of load varies with time or affects a structure thatexperiences a high degree of movement?A. Nonuniformly distributed loadB. Dynamic loadC. Impact loadD. Static uniformly distributed load

54. If you have an engine that supplies 4 hp but is only 35% efficient,what's the power input?A. 62.86 hpB. 11.43 hpC. 1.14 hpD. 0.01 hp55. Which of the following is not a type of structural load?A. Dead loadB. Live loadC. Wind loadD. Materials load56. Which of the following is not a form of bridge?A. PulleyB. TrussC. CantileverD. Suspension57.If the green arrow in this diagram represents 720ft. lb. of work, how far will the box move if it weights 180 lbs. ?

A. 4 ft.B. 8 ft.C. 1 ft.D. 2 ft.58. What force must you exert on the 14 in. radius handle of ajackscrew if the pitch is 0.125 in. and the weight of the load is 4,000lb.?A. 5.7B. 2.8C. 35.7D. 11.459.The radius of the axle is 7", the radius of the wheel is 8"and the blue box weighs 40 lbs. What is the effort force necessary tobalance the load?A. 70.18 lbs.B. 3.509 lbs.C. 35.09 lbs.D. 280 lbs.

60.If the radius of the axle is 7" and the radius of thewheel is 12", what is the mechanical advantage of this wheel and axleconfiguration?A. 12B. 1C. 127D. 761. If you have a gear train with three gears, the first with 28 teeth, thesecond with 20 teeth and the third with 4 teeth what is its mechanicaladvantage?A. 3.5B. 14C. 7D. 2862. Velocity is:A. Speed in a particular directionB. Acceleration over a particular time periodC. Speed over a particular time periodD. Speed over a particular distance

63. If you have a gear train with two gears, one with 32 teeth and theother with 16 teeth, how many revolutions does the second gear makefor each revolution of the first gear?A. 0.5B. 2C. 4D. 864.This image represents what configuration ofpulley?A. ComplexB. SimpleC. FixedD. Block and Tackle65. What's the mechanical advantage of a wedge that's 2 inches wideand 6 inches long?A. 6B. 0.33C. 12D. 366. What is the efficiency of a machine that has a work input of90 ft. lb. and a work output of 58.5 ft. lb. ?