One Problem, One Solution

General Knowledge · 10 questions

Practical reasoning questions about evaluating mechanisms and choices under specific conditions in everyday situations.

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1. When a door is locked, what is the metal part in the frame that the bolt enters called?

   1. Handle rose
   2. Cylinder plug
   3. Hinge leaf
   4. Strike plate
   Show the answer

   D) Strike plate

2. Which device detects a current imbalance between the live and neutral conductors and disconnects the circuit?

   1. Voltage regulator
   2. Overcurrent fuse
   3. Residual-current device
   4. Isolating switch
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   C) Residual-current device

3. What problem does the water retained in a P-trap beneath a sink help block?

   1. Entry of sewer gases
   2. High pressure in the drainpipe
   3. Sediment in the water supply
   4. Limescale in the water
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   A) Entry of sewer gases

4. Which unit should you check to compare the total visible light emitted by lamps?

   1. Lumens
   2. Color rendering index
   3. Kelvins
   4. Watts
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   A) Lumens

5. Which tool is used to tighten a nut to a specified torque?

   1. Torque wrench
   2. Adjustable wrench
   3. Combination pliers
   4. Phillips screwdriver
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   A) Torque wrench

6. Which protective component is suitable for brief voltage spikes during switching in an electronic circuit?

   1. Phase-monitoring relay
   2. Grounding electrode
   3. Surge protective device
   4. Voltage regulator
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   C) Surge protective device

7. Under the US Environmental Protection Agency's HEPA criterion, what minimum share of 0.3-micrometer particles is captured?

   1. 90 percent
   2. 99 percent
   3. 99.97 percent
   4. 95 percent
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   C) 99.97 percent

8. Which valve maintains the temperature at a hot-water outlet despite changing inlet conditions?

   1. Check valve
   2. Thermostatic mixing valve
   3. Shutoff valve
   4. Pressure-reducing valve
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   B) Thermostatic mixing valve

9. Which component should a closed water-heating system include to accommodate the expansion of heated water?

   1. Air separator
   2. Expansion tank
   3. Circulating pump
   4. Sediment filter
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   B) Expansion tank

10. Which drive is suitable when there must be no slippage between a drive sprocket and the output element?

    1. Flat-belt drive
    2. Friction clutch
    3. Friction-cone drive
    4. Chain-and-sprocket drive
    Show the answer

    D) Chain-and-sprocket drive