Question

What is the unit used to measure noise?

A.

Lumen

B.

Hertz

C.

Decibel (dB)

D.

Watt

Correct option is C


The correct answer is (c) Decibel (dB)
Explanation:
· Noise levels are measured in decibels (dB).
· It indicates the intensity or loudness of sound.
· Higher dB = louder and more harmful sound.
Information Booster:
· Normal conversation: 40–60 dB
· Traffic noise: 70–85 dB
· Above 85 dB causes hearing damage with prolonged exposure.

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 General Awareness Section Test 1

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon30 Marks
  • timerIcon25 Mins
languageIcon English
test-prime-package

Access ‘RRB NTPC UG CBT-1’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
354k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow