Ringelmann chart No. 2 corresponds to _______________ percent black smoke?

Related Mcqs:

The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?

A. Catalytic conversion B. Green house effect C. Global warming D. Both B. and C....

Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?

A. 0.002 B. 0.2 C. 1.2 D. 4.8...

In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?

A. t = 15 – 0.0065h B. t = 15 + 0.0065h C. t = 0.0035h -15 D. t = 15 – 0.0035h...

Presence of bacteria in potable (drinking) water causes_________________?

A. Turbidity B. Disease C. Bad odour D. Bad taste & colour...

Water filtration rate in a slow sand filter ranges from ____________ litres/m2/hr?

A. 10 to 20 B. 100 to 200 C. 1500 to 2500 D. 4000 to 5000...