Alberta Boilers Safety Association (ABSA) Practice Test

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Study for the Alberta Boilers Safety Association Test with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which weighing scales are used to measure noise levels?

A,B,C,S
0-3
A,B,C,Z
B,C,P,Q

The correct answer is: A,B,C,Z

The correct choice identifies the specific weighting scales used to measure noise levels in acoustics. A, B, C, and Z are recognized standards that represent different frequency responses and are commonly used in sound measurement. The A-weighting scale is designed to reflect the sensitivity of human hearing to different frequencies, which makes it ideal for evaluating noise pollution and environmental noise. It filters out low and high frequencies that the human ear does not perceive as readily. The B and C scales also play significant roles in sound measurement—B is less commonly used but is intended for specific applications, while C is a flat weighting scale that is useful for measuring peak sound levels, particularly in industrial settings. Choosing this option suggests an understanding of these different weightings—the reasoning being that A, B, C, and Z all relate to the measurement of sound in ways that align with professional acoustical standards. The misunderstanding with the other options lies in their omission of the necessary weighting scales defined by established noise measurement protocols.