The reference pressure used I the determination of sound pressure leve – McqOptions

MCQOPTIONS

1.	The reference pressure used I the determination of sound pressure level is
A.	20mPa
B.	20dB
C.	10mPa
D.	10dB
Answer» B. 20dB

Discussion

No Comment Found

Related MCQs

The concentration of Sulphur Dioxide (SO2) in ambient atmosphere was measured as 30 mg/m . Under the same conditions, the above SO2 concentration expressed in ppm is ___. Given: P/(RT) = 41.6 mol/m ; where, P = Pressure; T = Temperature; R= universal gas constant; Molecular Weight of SO2 = 64.
Column IColumn IIP. Coriolis effect1. Rotation of earthQ. Fumigation2. Lapse rate and vertical temperature profileR. Ozone layer3. InversionS. Maximum mixing depth (mixing height)4. DobsonThe correct match of Column I with Column II is
Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size dp are 80% and 65% respectively. What is the overall efficiency of the system for the same dp?
The mean indoor airborne chloroform (CHCl3) concentration in a room was determined to be 0.4 mg/m . Use the following data: T = 293 K, P = 1 atmosphere, R = 82.05 10 6 atm. m /mol-K, Atomic weights: C = 12, H = 1, Cl = 35.5. This concentration expressed in parts per billion (volume basis, ppbv) is equal to
SO2 and CO adversely affect
The concentration of Sulphur Dioxide (SO
The mean indoor airborne chloroform (CHCl
Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size d
SO
Particulate matter (fly ash) carried in effluent gases from the furnaces burning fossil fuels are better removed by