Practice Test Geeks(TalentLens) TalentLens Practice Tests Practice Test
← All TALENTLENS Flashcard Decks

Mechanical Comprehension Flashcards

7 cards from real TALENTLENS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Mechanical Comprehension flashcards as text

  1. A flywheel stores energy by rotating at high speed. What physical property determines how much energy it can store for a given RPM?

    Answer: Moment of inertia

    Rotational kinetic energy = ½Iω², so a higher moment of inertia stores more energy at the same angular velocity.

  2. A pipe has water flowing through it. If the pipe develops a small hole, in which direction does the water spray?

    Answer: Perpendicular to the pipe wall

    Water pressure acts equally in all directions; a hole lets water escape perpendicular to the pipe wall under that pressure.

  3. Two gears mesh together. Gear A has 15 teeth and turns clockwise. What direction does Gear B turn?

    Answer: Counterclockwise

    Meshed gears always rotate in opposite directions, so if A turns clockwise, B turns counterclockwise.

  4. A car engine produces 200 ft-lbs of torque at 3000 RPM. What is its approximate horsepower?

    Answer: 114 HP

    HP = (Torque × RPM) / 5252 = (200 × 3000) / 5252 ≈ 114 HP.

  5. A bolt is tightened with a torque wrench. Which change would require less force to achieve the same torque?

    Answer: Using a longer wrench

    Torque = Force × arm length; a longer wrench increases the moment arm, requiring less force for the same torque.

  6. Which arrangement of springs produces the greatest combined stiffness?

    Answer: Two springs in parallel

    Springs in parallel add their spring constants (k_total = k1 + k2), giving greater stiffness than either alone or in series.

  7. A heavy casting is being hoisted by a crane. What force acts in addition to the object's weight that the crane cable must support when acceleration is upward?

    Answer: Inertial force from acceleration

    When accelerating upward, the cable must support both the object's weight and the extra force F = ma needed to accelerate it.