Inside Everyday Mechanisms

General Knowledge · 10 questions

Ten questions on how hinges, locks, traps, and zippers work.

Answer each question first, then check with “Show the answer”. You can also play the same quiz in the Quizera app by searching for it in Explore, as a live game, a test or flashcards.

1. Which part of a standard butt hinge is fastened to the door and frame?

   1. Hinge pin
   2. Hinge bearing
   3. Hinge leaf
   4. Hinge washer
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   C) Hinge leaf

2. Which hinge type is fastened along most of a door's edge?

   1. Butt hinge
   2. Concealed hinge
   3. Pivot hinge
   4. Continuous hinge
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   D) Continuous hinge

3. In a butt hinge, which part passes through the interleaved cylindrical sections of the leaves?

   1. Leaf spring
   2. Hinge pin
   3. Hinge leaf
   4. Mounting screw
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   B) Hinge pin

4. A bimetal strip can open a kettle’s circuit after boiling. Which difference between its two metals makes this possible?

   1. Thermal conductivity coefficients
   2. Electrical resistivities
   3. Thermal expansion coefficients
   4. Specific heat capacities
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   C) Thermal expansion coefficients

5. In a pin-tumbler cylinder lock, where must the correct key align the pins for the cylinder to turn?

   1. Shear line
   2. Keyway
   3. Bolt channel
   4. Strike plate
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   A) Shear line

6. In a P-trap, what prevents sewer gases from entering a room through the drain?

   1. Cleanout plug
   2. Air admittance valve
   3. Strainer basket
   4. Water seal
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   D) Water seal

7. A drain vent primarily helps protect a trap’s water seal from what?

   1. Solid-particle buildup
   2. Corrosion
   3. Pressure fluctuations
   4. Heat loss
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   C) Pressure fluctuations

8. Which parts are guided by a zipper slider’s channels as the zipper opens or closes?

   1. Zipper tape
   2. Zipper teeth
   3. Pull tab
   4. Bottom stop
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   B) Zipper teeth

9. When reconnecting a separating zipper, which part is inserted into the retaining box?

   1. Insertion pin
   2. Pull tab
   3. Slider body
   4. Top stop
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   A) Insertion pin

10. Which part is fastened to the door frame and receives the door lock’s bolt?

    1. Door viewer
    2. Strike plate
    3. Hinge leaf
    4. Cylinder escutcheon
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    B) Strike plate