A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours
✅ The correct answer is option C.
Civil Engineering Mcqs MCQs
252. Poise is the unit of________________?
A. surface tension
B. capillarity
C. viscosity
D. shear stress in fluids
✅ The correct answer is option C.
253. For pipes, turbulent flow occurs when Reynolds number is_________________?
A. less than 2000
B. between 2000 and 4000
C. more than 4000
D. less than 4000
✅ The correct answer is option C.
254. A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will__________________?
A. increase
B. decrease
C. remain same
D. increase/decrease depending on depth of immersion
✅ The correct answer is option C.
255. The laying of sewers is done with____________________?
A. Magnetic compass
B. Theodolite
C. Level
D. Clinometer
✅ The correct answer is option C.
256. The ratio of depths at partial flo________________?
A. 1 –
B. 1 –
C. ½ (1 –
D. ½ (1 –
✅ The correct answer is option C.
257. The horizontal component of buoyant force is__________________?
A. negligible
B. same as buoyant force
C. zero
D. non of these
✅ The correct answer is option C.
258. Antisyphonage pipe is fitted_______________?
A. At the end of septic tanks
B. On manholes
C. With a W.C. trap
D. At the beginning of sewer line
✅ The correct answer is option C.
259. Surface tension has the units of____________________?
A. newtons/m
B. newtons/m
C. new tons/m
D. newtons
✅ The correct answer is option C.
260. As per PEC Code of Conduct a member shall report unethical professional practices of an engineer or a member with substantiating data to____________?
A. Court of Law
B. Concerned Department
C. Pakistan Engineering Council
D. Law enforcing Agency
✅ The correct answer is option C.