ASVAB-Mechanical-Comp Dumps ASVAB-Mechanical-Comp Braindumps ASVAB-Mechanical-Comp Real Questions ASVAB-Mechanical-Comp Practice Test ASVAB-Mechanical-Comp Actual Questions Military ASVAB-Mechanical-Comp ASVAB Section 3 : Mechanical Comprehension https://killexams.com/pass4sure/exam-detail/ASVAB-Mechanical-Comp Question: 173 In the figure above, if the cogs move up the track at the same rate of speed, Cog A will __________. A. reach the top at the same time as Cog B B. reach the top after Cog B C. reach the top before Cog B D. have greater difficulty staying on track Answer: C The larger cog (Cog A) covers a greater linear distance in a given period of time. Question: 174 If a house key, a wooden spoon, a plastic hanger, and a wool jacket are all the same temperature, which one feels the coldest? A. key B. spoon C. hanger D. jacket Answer: B The key will feel coldest because metal is a better conductor than the other materials. Question: 175 In the figure above, if the fulcrum supporting the lever is moved closer to the cat, the cat will be __________. A. easier to lift and will move higher B. harder to lift but will move higher C. easier to lift but will not move as high D. harder to lift and will not move as high Answer: C If the fulcrum is moved closer to the cat, the length of the effort arm of the lever will be increased, making the cat easier to raise, but the height to which the cat can be raised will be reduced. Question: 176 The mechanical advantage of the block-and-tackle arrangement shown above is __________. A. 2 B. 4 C. 6 D. 1 Answer: A Because this block-and-tackle arrangement merely changes the direction of the pull, it has a mechanical advantage of only 2. Question: 177 When Cam A completes one revolution, the lever will touch the contact point __________. A. once B. never C. four times D. twice Answer: D When the high point of the cam connects with the lever arm, the lever arm will touch the contact point. Two high points on the cam mean the lever arm will touch the contact point twice with each revolution of the cam. Question: 178 A single block-and-fall is called a __________. A. fixed pulley B. gun tackle C. runner D. sheave Answer: C A single block-and-fall is called a runner. Question: 179 A clutch is a type of __________. A. universal joint B. coupling C. gear differential D. cam follower Answer: B Clutches connect and disconnect parts, so they’re a type of coupling. Question: 180 A cubic foot of water weighs about 62.5 pounds. If an aquarium is 18 feet long, 10 feet deep, and 12 feet wide, what’s the approximate pounds-per-square-inch pressure (psi) on the bottom of the tank? A. 2 psi B. 4 psi C. 5 psi D. 7 psi Answer: B You can determine the pressure of all that water by multiplying the volume of the aquarium by the weight of the water. Volume = lwh. The bottom of the tank is 18 feet long by 12 feet wide by 10 feet high for a total volume of 2,160 cubic feet (18 x 12 x 10). A cubic foot of water weighs approximately 62.5 pounds. 2,160 x 62.5 gives an approximate pressure on the bottom of the tank of about 135,000 pounds over the entire surface area. The surface area of the bottom of the tank is length x width. 216 inches (18 feet x 12) x 144 inches (12 feet x 12) = 31,104. Dividing the pressure of 135,000 by the number of square inches of surface area gives an approximate PSI of 4. Question: 181 Springs used in machines are usually made of __________. A. plastic B. bronze C. nylon fiber D. steel Answer: D Machine springs are usually made of steel although sometimes they’re made of brass or other metal alloys. Question: 182 The force produced when a boxer’s hand hits a heavy bag and "bounces" off it is called __________. A. static electricity B. magnetism C. recoil D. gravity Answer: C Recoil occurs when an object producing a force is kicked back. Question: 183 In the figure above, if Gear 1 has 25 teeth and Gear 2 has 15 teeth, how many revolutions does Gear 2 make for every 10 revolutions Gear 1 makes? A. about 162/3 B. 12 C. about 1/3 more D. about 20 Answer: A To determine the answer, multiply the number of teeth Gear 1 has D and the number of revolutions it makes (R). Divide that number by the number of teeth Gear 2 has D to determine the number of revolutions Gear 2 makes (r). Because the gears are proportional, this formula will show you the ratio of teeth to revolutions. r = DR/d r = (25 x 10)/15 r = 250/15, or 1610/15, or 162/3 Question: 184 Looking at the figure above, when Cat B lands on the seesaw, Cat A will __________. A. remain stationary B. hit the ground hard C. rise in the air quickly D. enter the stratosphere Answer: C Cat B landing on the seesaw will propel Cat A into the air. Question: 185 Air weighs about 15 psi. What’s the amount of pressure (force) exerted on the top of your head, given a surface area of 24 inches? A. 360 pounds B. 625 pounds C. 5/8 pound D. 180 pounds Answer: A Power equals force divided by area in square inches (P = F/A). This formula can also be stated as F = A x P. Substitute the known quantities. F = 15 x 24 = 360 pounds. Question: 186 If a first class lever with a resistance arm measuring 2 feet and an effort arm measuring 8 feet are being used, what’s the mechanical advantage? A. 2 B. 4 C. 6 D. 1 Answer: B Mechanical advantage can be calculated as Length of Effort Arm ÷ Length of Resistance Arm. MA = 8 ÷ 2 = 4. Question: 187 The bottoms of four boxes are shown above. The boxes all have the same volume. If postal regulations state that the sides of a box must meet a minimum height, which box is most likely to be too short to go through the mail? A. NO. 4 B. NO. 2 C. NO. 1 D. NO. 3 Answer: D The box with the largest area on the bottom will have the shortest sides. If length x width x height = volume, and all the boxes have equal volume, then the sides must be shortest on the box with the largest area on the bottom. Calculate the area of each box bottom: NO. 1 = 20 square inches; NO. 2 = 35 square inches; NO. 3 = 48 square inches; and NO. 4 = 27 square inches. NO. 3, which has the largest area, will have the shortest sides. Question: 188 An induction clutch works by ___________. 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