Moderate
For the safety of a steam boiler the number of safety valves fitted are____________?
Correct answer: C. two
- A. four
- B. three
- C. two
- D. one
Explanation
Two safety valves provide protection against excessive boiler pressure, while allowing one valve to remain effective if the other requires attention. The exact arrangement can vary with boiler regulations, but two is the standard textbook answer.
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