23- Which of the following is the least incompressible fluid?
(A) Gasoline
(B) Kerosene oil
(C) Helium
(D) Water
24- Garret’s diagrams are used to
(A) design channels
(B) determine reservoir capacity
(C) estimate the channel’s efficiency
(D) calculate evaporative losses in a reservoir
25- The suitable layout for a water supply distribution system, for an irregularly grown town, is:
(A) Dead-end system
(B) Grid iron system
(C) Ring system
(D) Radial system
26- Air-binding in rapid sand filters is encountered when
(A) There is excessive negative head
(B) The water is subjected to prolonged aeration
(C) The raw water contains dissolved gases
(D) The filter bed comprises largely of coarse sand
27- In house plumbing system, the leakage of different pipes is tested by:
(A) Smoke Test
(B) Air Test
(C) Water Test
(D) All of the above
28- Which statement is TRUE for ground improvement?
(A) Pre-compression of soil is generally effective in only clays and silts
(B) Compaction piles can be used for cohesive soils
(C) Deep mixing can be used for rocks
(D) Densification by vibrofloating is not effective for cohesionless soils
29- The most accurate method for the determination of water content in the laboratory is:
(A) Sand Bath Method
(B) Oven-drying Method
(C) Pycnometer Method
(D) Calcium Carbide Method
30- Toughness index of a soil is the ratio of
(A) Plasticity index to the flow index
(B) Liquidity index to the flow index
(C) Consistency index to the flow index
(D) Shrinkage index to the flow index
31- The basic structural units of clay minerals composed:
(A) A Silicon atom surrounded by four hydroxyl atoms
(B) Two silicon atoms surrounded by four oxygen atoms
(C) One aluminium atom surrounded by six hydroxyl atoms
(D) One aluminium atom surrounded by six oxygen atoms
32- Which of the following methods is best suited for determination of permeability of coarse‑grained soils?
(A) Constant head method
(B) Falling head method
(C) Both (A) and (B)
(D) None of the above
33- Consistency of cohesive soils is related to its
(A) shear strength
(B) density
(C) permeability
(D) moisture content
ANSWERS:
23-(C), 24-(A), 25-(A), 26-(A), 27-(D), 28-(A), 29-(B), 30-(A), 31-(C), 32-(A), 33-(A)