Noise level inside a jet airliner in normal flight is about ______________ decibels?

Related Mcqs:

Which of the following is not a weightless pollutant ?

A. SPM B. Thermal pollution C. Radioactive rays D. Noise pollution...

Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?

A. Thermal power plant B. Petroleum refinery C. Nitric acid plant D. Sulphuric acid plant...

Peroxyacetyl nitrate (PAN), a pollutant is found in the_________________?

A. Automobile exhaust B. Flue gas of coal based power plant C. Exhaust of nitric acid plant D. Exhaust of sulphuric acid plant...

The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

A. Ionosphere B. Troposphere C. Stratosphere D. None of these...

During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?

A. Idle running B. Acceleration C. Cruising D. Deceleration...