Practice Test Geeks(ETC) Engineering Technician Certification Practice Test
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Technical Design & Engineering Principles Flashcards

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

Read the first 7 Technical Design & Engineering Principles flashcards as text

  1. In engineering drawings, what does the abbreviation 'TYP' indicate when placed next to a dimension?

    Answer: The dimension applies to all identical features in the view

    'TYP' (typical) indicates that the dimension or feature shown applies to all other identical or similar features in the view without individual annotation.

  2. A gear with 40 teeth meshes with a gear having 20 teeth. If the small gear rotates at 600 RPM, what is the speed of the large gear?

    Answer: 300 RPM

    Gear ratio = driven/drive teeth = 40/20 = 2, so the large gear turns at 600/2 = 300 RPM.

  3. Which type of engineering drawing shows a component as it would appear with all hidden features visible and outer material removed, revealing internal construction?

    Answer: Cutaway/section view

    A cutaway or section view removes material along a cutting plane to reveal interior features that would otherwise be hidden.

  4. In the context of engineering design, what is 'design for manufacturability' (DFM)?

    Answer: Designing parts to simplify and reduce the cost of manufacturing

    DFM is an engineering practice that modifies product design to make it easier, faster, and less expensive to manufacture without compromising function.

  5. What does 'Maximum Material Condition' (MMC) mean for a shaft with a diameter tolerance of 1.000/0.995 inches?

    Answer: 1.000 inches (largest shaft)

    MMC for an external feature (shaft) is the largest permissible size — 1.000 inches — when the part contains the maximum amount of material.

  6. A thermal expansion calculation is needed for a steel rod 10 feet long that will experience a temperature rise of 100°F. If the coefficient of thermal expansion for steel is 6.5 × 10⁻⁶ /°F, what is the elongation?

    Answer: 0.0078 feet

    ΔL = α × L × ΔT = 6.5×10⁻⁶ × 10 ft × 100°F = 0.0065 ft, which equals approximately 0.078 inches.

  7. Which engineering principle states that a structure is in equilibrium when the sum of all forces and the sum of all moments acting on it are both equal to zero?

    Answer: Conditions of static equilibrium

    Static equilibrium requires ΣF = 0 (net force equals zero) and ΣM = 0 (net moment equals zero) simultaneously.