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MECHANICAL REASONING ACTUAL PRACTICE TEST
- A)Post A Which post holds up the greater part of the load? A- Post A The weight^ is^ distributed^ more^ on^ B- Post B the side of post A, Therefore, it is holding up the greatest part of the load. C- Both equal D- Not clear
- C)Neither of the other gears Because of the way the gears are meshed, both gear 1 and gear 3 will move in the opposite direc- tion of gear
- A)A Pulley A is the smallest gear. Therefore, it must turn faster (make more revolutions per minute).
- A)Once The single lobe on cam A will cause the setscrew to hit the con-
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MECHANICAL REASONING ACTUAL PRACTICE TEST
Which of the other gears is moving in the same direction as gear 2? A) Gear 1 B) Gear 3 C) Neither of the other gears D) Both of the other gears In this arrangement of pulleys, which pulley turns fastest? A) A B) B C) C D) D As cam A makes one complete turn in the figure above, the setscrew will hit the contact point A) Once B) Twice
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MECHANICAL REASONING ACTUAL PRACTICE TEST
the size^ of^ gear^ B.^ Therefore,^14 x^ C) 14 1.5 = 21.
- B)Metal Spoon Metal will feel coldest out of pa-
D) 9
If all of the following objects are at room temperature, which will feel coldest? A) Book per, wood,^ and^ the^ fabric^ of^ a^ blan-^ B) Metal Spoon ket . C) Wooden Chest D) Blanket
- C)Air pressure on top of the liquid In the illustration above, liquid is being transferred from the barrel to the bucket by The siphon works, in part, be- A) The vacuum at the lower end of the hose cause of air pressure on the top of (^) B) The ditterence between the fluid volumes in the barrel the liquid. and bucket C) Air pressure on top of the liquid D) Capillary action
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MECHANICAL REASONING ACTUAL PRACTICE TEST
- C)Move downward until it reaches The figure above represents a pulley, with practically no the floor Newton's Law of Motion states that a body at rest will stay at rest unless acted on by an out- side force. Conversely, a body in friction, from which two 10pound weights are suspended as indicated. If a downward force is applied to weight 1, it is most likely that weight 1 will A) Come to rest at the present level of weight 2 B) Move downward until it reaches with weight 2 C) Move downward until it reaches the floor motion stays in motion unless act- (^) D) Pass weight 2 in its downward motion and then return ed on by an outside force. In this picture, both objects are at rest (equilibrium). When an out- side force is added to weight 1, the equilibrium changes, moving this weight downward. Because the pulley has practically no fric- tion, the weight strikes the floor.
- B)32 gallons per minute The volume is dependent on the area of the outlet. Since A= πr² and r = d/2 , then A= π(d²/4) where A is the area and d is the diameter.
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MECHANICAL REASONING ACTUAL PRACTICE TEST
The volume is proportional to the diameter squared (d²). When the volumes of the 1-inch and 2-inch outlets are compared, we see that the latter will produce 4 times as great a volume. If the 1- inch out- let has an 8-gallon flow, then the 2-inch outlet will have a 32-gallon flow.
- A) C toward the right If nut A were removed, it would
- The arm in the figure above is exactly balanced as shown. If nut A is removed entirely, then, in order to rebalance the arm, it will be necessary to be necessary^ to^ move^ nut^ C^ to^ the^ turn nut right to counterbalance the loss of the weight of nut A. A) C toward the right B) C toward the left C) B up D) B down
- B) Relieve the air from steam radi- The purpose of an air valve in a heating system is to ators . A) Prevent pressure from building up in a room due to the heated air. An air valve on a radiator removes (^) B) Relieve the air from steam radiators. air from the steam pipes. If air is trapped in the pipes, it prevents the steam from going to the radi- ator. This would prevent the radi- ator from producing heat.
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MECHANICAL REASONING ACTUAL PRACTICE TEST
C) Allow excessive steam pressure in the boiler to escape to the atmosphere. D) Control the temperature in the room.
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MECHANICAL REASONING ACTUAL PRACTICE TEST
B) 1/2 turn C) 3/4 turn D) 1 complete turn
- The figure above shows a brass and an iron strip continuously riveted together. High temperatures would probably A) Have no ettect at all B) Bend the strips C) Separate the strips D) Shorten the strips Study the gear wheels in the figure above, then determine which of the following statements is true. A) If you turn wheel M clockwise by means of the handle, wheel P will also turn clockwise. B) It will take the same time for a tooth of wheel P to make
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MECHANICAL REASONING ACTUAL PRACTICE TEST
M has 12 teeth. When wheel M makes a full turn, wheel P will still have 4 more teeth to turn. So wheel P is slower and will take more time to turn.
- C) 12 a full turn as it will for a tooth of wheel M. C) It will take less time for a tooth of wheel P to make a full turn than it will take a tooth of wheel M. D) It will take more time for a tooth of wheel P to make a full turn than it will for a tooth of wheel M. For the turnbuckle shown above, the number of complete turns of Part 1 required to make the ends of the threaded The trick^ with^ this^ question^ is^ that^ rods meet is both of the rods will be pulled in at the same time when the turn- buckle is turned. If it is turned 12 times (12 threads per inch), both rods will be pulled in 1 inch.
A) 6
B) 18
C) 12
D) 24
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MECHANICAL REASONING ACTUAL PRACTICE TEST
- B) Turn Slower Imagine the driven wheel as a record. For one rotation of the record, point Y travels much far- ther than point X. It takes more more turns of the driver wheel to turn point Y one complete revolu- tion.
- B) 175 pounds The diameter of 3½ times (28/8) the diameter of the axel. When 50lbs of force is applied to the handle, it is multiplied by 3½ times, or 28/8x50=175lbs When the driver wheel in the figure above is moved loca- tion X to location Y, the driven wheel will A) Reverse its direction of rotation B) Turn Slower C) Not change its speed of rotation D) Turn faster In the diagram above, the axle 8 inches in diameter has attached a handle of 28 inches in diameter. If the force of 50 pounds is applied to the handle, the axle will lift a weight of A) 224 pounds B) 175 pounds C) 200 pounds D) 88 pounds
- A) Provide for changes in length of The main purpose of expansion joints in steam lines is heated pipe A) Provide for changes in length of heated pipe
When steam flows through pipes, B) Allow for connection of additional radiators it expands. The pipes would burst C) Provide locations for valves if extra space were not provid- D) Reduce breakage of pipe due to minor movement of ed for the expansion and contrac- the building frame tion.
- B) 36 pounds What ettort must be exerted to lift a 60 pound weight in the figure of the first class lever shown above(disregard Let Y= effort that must be exerted (^) the weight of the lever in your computation)? Step1 60x3=Yx Step2 180=5Y Step3 Y=180/ Step4 Y=
- A) Rise 1 gallon per minute The water is filling up in the tank at a rate of 120 gallons per hour, or 2 gallons per minute (120/60=2). The tank is also emptying at a rate of 1 gal- A) 30 pounds B) 36 pounds C) 45 pounds D) 60 pounds If water is flowing into the tank shown above at the rate of 120 gallons per hour and flowing out of the tank at a constant rate of 1 gallon per minute, the water level in the tank will A) Rise 1 gallon per minute B) Rise 2 gallons per minute C) Fall 2 gallons per minute
C)C) No. 3 Figure No. 3 has the largest sur- face area and thus would need the shortest sides. Area is length x width. For No. 3 area= 7ft x 4ft= 28sqft
- D) Waterlogged float Shown above are the bottoms of four bins for storing materials. If the bins are all capable of holding the same amount of any particular material, then the bin whose sides have the least height is the one whose bottom is shown as A) No. 1 B) No. 2 C) No. 3 D) No. 4 If the flush tank of a toilet fixture overflows, the fault is likely to be The water shut-off valve on a flush (^) A) Failure of the ball to seat properly tank is closed by force of a light- weight ball rising inside the tank. B) Excessive water pressure C) Defective trap in the toilet bowl If the^ float^ becomes^ waterlogged,^ D) Waterlogged float it will not rise and shut off the wa- ter.
- A) Pulley A The mechanical advantage is cal- culated by the number of strands supporting the weight. A has 3 strands, B has 2, C only has 1 Which pulley arrangement shown above requires the least force at F to lift the weight? A) A B) B C) C D) All 3 require the same force
19 / In the figure above, the follower is at its highest position between points A) Q and R B) R and S C) S and T D) T and Q Which of the following statements is true about the figure above? A) If the nut is held stationary and the head turned clock- wise the bolt will move up. B) If the head of the bolt is held stationary and the nut is turned clockwise the nut will move down. C) If the head of the bolt is stationary and the nut is turned clockwise the nut will move up. D) If the nut is held stationary and the bolt it turned counterclockwise the nut will move up When the tuning fork shown above is struck the ping pong ball will A) Remain Stationary
20 / moves currents of air. This vibrat- B) Bounce up and down ing air would cause the ping pong C) Hit the tuning fork ball to be pushed away.
- C) Be enlarged The film of water inside the loop would form a lens that would en- large the printing on the page. If you look through a water filled globe, objects will also appear larger.
- B) Rise in the air If the man moves to the back of the seesaw, his momentum (weight x distance from the cen- ter) will increase. The woman, who is lighter will rise in the air.
- A) Insulating the pipe Insulating the pipes keeps warm
