Q21. What is the Mohs scale used for?
Correct: Measuring mineral hardness
It ranks minerals from 1 (talc) to 10 (diamond).
Q22. Which system transports water in buildings?
Correct: Plumbing system
Plumbing handles water supply and drainage.
Q23. What is a theodolite used for?
Correct: Measuring angles
Theodolites measure horizontal and vertical angles in surveying.
Q24. Which type of roof is sloped on all four sides?
Correct: Hip roof
Hip roofs provide better wind resistance.
Q25. What is geotechnical engineering?
Correct: Study of soil and rock behavior
It analyzes subsurface conditions for construction.
Q26. Which test determines the fineness of cement?
Correct: Sieve test
Sieve test measures particle size distribution.
Q27. What is a lintel?
Correct: Beam over an opening
Lintels support loads above doors and windows.
Q28. Which type of pavement is flexible?
Correct: Asphalt pavement
Asphalt adapts to minor settlements.
Q29. What is the purpose of a septic tank?
Correct: Treat wastewater
Septic tanks separate solids from liquids in sewage.
Q30. Which instrument measures atmospheric pressure?
Correct: Barometer
Used in environmental engineering for weather prediction.
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