PICAT PART 9 - MECHANICAL COMPREHENSION EXAM

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PICAT PART 9 - MECHANICAL COMPREHENSION EXAM

QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -11 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: a ball is attached to one end of a rod AB, and the other end is attached to a vertical rotating axle as shown. the joint at B contains a pin so that the ball can move up and down if the axle BC rotates faster angle X will

• increase
• decrease
• not change
• become 90 degrees

Answer:

decrease Question 2: A car stops suddenly. Why are the passengers thrown forward against their seat belts?

Answer:

the inertia of each passenger

Question 3: This drive pulley always turn

Answer:

Faster than pulley A or C but not pulley B

Question 4: Is is true that friction forces

• prevent motion altogether
• only operate in vertical directions
• always aid forces producing motion
• always oppose forces producing motion

Answer:

Always oppose the forces producing motion Question 5: The spring pulls the left end of the lever against the cam. as the cam makes 4 rotation how many times will the right end of the lever move up and down?

• 2
• 4
• 6
• 8

Answer:

4 Question 6: What would you tell the person who is try to loosen the rusty nut with the wrench?

• move your hand closer to the nut
• move your hand further from the nut
• keep your hand where it is
• it does not matter where you hold the wrench

Answer:

move your hand father from the nut

Question 7: In the pulley system, what forces must be applied to balance the 10 pound weight?

• 5 pounds
• 10 pounds
• 15 pounds
• 20 pounds

Answer:

• pounds

Question 8: Four weights are tied together and hung from the ceiling. What will be the tension in the cord at the point labeled x?

• 10 pounds
• 30 pounds
• 40 pounds
• 60 pounds

Answer:

60 pounds

Question 9: Which of the following objects has the most structural strength?

• triangle
• rectangle
• octogon

d) T

Answer:

triangle

Question 10: The surface area of piston A is 2 square inches, while the surface area of piston b is 4 inches if piston a is pushed down 6 inches how far will piston b move up?

• 3 inches
• 4 inches
• 6 inches
• 12 inches

Answer:

• inches

Question 11: The illustration shows a water tank that is made of wood planks and reinforces metal hoops. Why are the hoops closer together near the bottom of the tank?

• the hoops prevent the tank from toppling over
• the hoops tend to slip down the sides of the tank over time
• the weight of the wood planks requires more support near the bottom
• the water pressure pushing against the sides of the tank is greater near the bottom

Answer:

the water pressure pushing against the sides of the tank is greater near the bottom