Civil Engineering MCQJE Level Civil Engineering
The best description of ultrasonic sound has frequency is:
Physics and ChemistryPhysics and ChemistryMEDIUM
Choose the correct answer
A
exactly 50 Hz
B
between 20 Hz and 2 kHz
C
less than 20 Hz
D
greater than 20 kHz
Correct Answer
D. greater than 20 kHz
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greater than 20 kHz is the correct association for ultrasonic sound has frequency.
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This MCQ belongs to RRB JE Civil & Allied Engineering CBT-2 Full Mock Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.