MCQ
1. A soil is considered to be active if the actively number is
less than 0.75
between 0.75 and 1.40
greater than 1.40
less than 1
2. which disinfection system is suitable for public water supply system (কোন বিশুদ্ধকরণ ব্যবস্থা পাবলিক জল সরবরাহ ব্যবস্থার জন্য উপযুক্ত)
chlorination
ultraviolet radiation
Ozone
boiling
3. Marshall test is performed for
concrete mix
Asphalt mix
Asphalt
betamin
4. contour survey is normally done by using
level machine
total station
theodolite
tachometer
5. For highway geometric design purpose the speed used is
15th percentile
50th percentile
85th percentile
98th percentile
6. The yield of well depends upon:
Permeability of soil
Area of aquifer opening into the wells
Actual flow velocity
All of the above
7. Wheels of a rolling stock are provided flanges on
outer side
inner side
neither side
neither side
8. which one is not a Greenhouse gas.
ozone
oxide of Sulphur
oxide of Nitrogen
water vapour
9. Maximum number of vehicles can be parked with
parallel parking
30° angle parking
45° angle parking
90° angle parking
10. if hardness of a water sample is greater than alkalinity then which of the following statement is true (যদি একটি জলের নমুনার কঠোরতা ক্ষারত্বের চেয়ে বেশি হয় তবে নিচের কোন বিবৃতিটি সত্য)
total hardness = carbonate hardness
none of the above
Ozonenon carbonate hardness = 0
boilingcarbonate hardness = alkalinity
11. For plumbing drainage of a high rise building who is system is suitable
one pipe system
two pipe system
single structure system
none of these
12. The decay rate of biodegradable organic in water is assume to be
third order reaction
first order reaction
second order reaction
none of these
13. Camber in the road is provided for
Effective drainage
Counteracting the centrifugal force
Having proper sight distance
All of the above
14. who is statement is not true in the case of turbidity.
turbidity can affect disinfection process and increase filtration cost
turbidity is used as a proxy of suspended solid
Organic particle can cause turbidity
colour producing dissolved substance can also cause turbidity
15. which of the following does not produce disinfection by_products (নিচের কোনটি..... যুক্ত হলেও পানীয় জল বিশুদ্ধ করে না)
chloramine
ozone
free chlorine
chlorine dioxide
16. The effluents from the septic tank are discharged Into -
soak pit
drainage
oxidation
sewer
17. which of the statement is generally true for ground water (কোন বিবৃতিটি সাধারণত ভূগর্ভস্থ পানির জন্য সত্য)
has low dissolved Oxygen and low carbon dioxide
has low dissolved Oxygen and high number of microorganism
has high dissolved oxygen and low turbidity
has low turbidity and high carbon dioxide
18. which is a regulatory requirement for environment clearance of industries according to environment conservation rule 1997
ΕΙΑ
IEE
EMP
All of the above
19. the surface ready to receive the road structure is called
formation
improved subgrade
subgrade
toe
20. A saturated soil sample has water content of 35% and specific gravity of soil particle is 2.65. The void ratio of the soil is
0.4
0.52
2.0
2.03