Related Questions

Toggle Filter আইকনটি-i. Remove filter হিসেবে কাজ করেii. Undo filter হিসেবে কাজ করে iii. Apply filter হিসেবে কাজ করেনিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
In trickling filter, B.O.D. is reduced to
A 30 to 40%
B 40 to 60%
C 60 to 80%
D 80 to 90%
The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.
A Anaerobic
B Saphrophytic
C Aerobic
D Parasitic
A water filter can be filled with 8 jugs of capacity 1.3 liters each. How many jugs are required to fill the same filter, if capacity of the jug is 0.8 liters?
A 15
B 12
C 8
D 13
Which one of the following filter is used to filter several variables with the same or different filters?
A filter_var_array()
B filter_var()
C filter_input
D filter_input_array
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be
A Higher
B Lower
C Remain unaffected
D None of the above
The yield of a rapid gravity filter as compared to that of slow sand filter, is
A 10 times
B 15 times
C 20 times
D 30 times
Shell and leaf filter as compared to plate and frame filter
A Entails less labor cost
B Facilitates filtration under higher pressure
C Provides more effective washing
D All of the above
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.
A Rapid sand
B Pressure
C Gravity
D Slow sand
The most suitable filter for the removal of very small amount of precipitate from very large volumes of water is the __________ filter.
A Vacuum
B Sand
C Plate & frame
D Rotary

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