341. If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?
A. Hydrogen sulphide
B. Carbon dioxide
C. Methane
D. Oxygen
✅ The correct answer is option C.
Civil Engineering Mcqs MCQs
342. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?
A. 0.05552 cumec
B. 0.05554 cumec
C. 0.05556 cumec
D. 0.0556 cumec
✅ The correct answer is option C.
343. Dry weather flow is__________________?
A. Average daily rate of flow
B. Average monthly rate of flow
C. Average annual rate of flow
D. Water supply allowance per capita
✅ The correct answer is option D.
344. Double taxation is a disadvantage of which business organization ?
A. Sole proprietorship
B. Partnership
C. Corporation
D. Enterprise
✅ The correct answer is option C.
345. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is__________________?
A. 1.39 m
B. 1.49 m
C. 1.59 m
D. 1.69 m
✅ The correct answer is option D.
346. In normal conditions, the period for sludge digestion, is_______________?
A. 10 days
B. 20 days
C. 30 days
D. 60 days
✅ The correct answer is option C.
347. The line of action of the buoyant force acts through the centroid of the ___________________?
A. submerged body
B. volume of the floating body
C. volume of the fluid vertically above the body
D. displaced volume of the fluid
✅ The correct answer is option D.
348. Which is true about partnership ?
A. It has a perpetual life
B. It will be dissolved if one of the partners ceases to be connected with the partnership
C. It can be handed down from one generation of partners to another
D. Its capitalization must be equal for each partner
✅ The correct answer is option C.
349. Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for__________________?
A. Unexpected large scale infiltration of stream water
B. Unexpected increase in the population
C. Under estimates of maximum and average flows
D. All of the above
✅ The correct answer is option D.
350. Hydraulic mean radius is_______________?
A. Mean radius of sewer
B. Difference in heads between two points in circular pipes
C. Mean of radii in a pipe line of varying cross -sections
D. Cross-sectional area/wetted perimeter
✅ The correct answer is option D.