UPSC Recruitment Paper 2018 : Lecturer (Civil Engineering) & Constructions 

1. In ‘Float Glass’ manufacturing, the molten glass coming out of the furnace is allowed to float on:
(a) Molten Lead
(b) Steel Plate
(c) Molten Zinc
(d) Molten Tin

2. When rain water falls on hot bricks, the deformed shape is called: 
(a) Checks
(b) Chuffs
(c) Spots
(d) Blisters

3. The Cement Clinker formed consequent to burning contains the Bogue compound called ‘Belite’ which has the chemical formula:
(a) 3CaO. SiO2
(b) 3CaO. Al2O3
(c) 2CaO. SiO2
(d) 4CaO. Al2O3. Fe2O3

4. Which one of the following components in cement has to be minimized to qualify as Low Heat Cement(LHC)?
(a) Tricalcium Silicate
(b) Dicalcium Silicate
(c) Tricalcium Aluminate
(d) Tetra Calcium Alumina Ferrite

5. The rate of creep decreases with time; creep strains after what duration are taken as terminal values?
(a) 5 yrs
(b) 6 yrs
(c) 7 yrs
(d) 8 yrs

6. As per IS: 383 – 1970, percentage passing of sand from 600 micron sieve by weight for Zone-I and Zone-II sands are, respectively: 
(a) 30 − 70 and 55 − 90
(b) 15 − 34 and 35 − 59
(c) 60 − 95 and 75 − 100
(d) 05 − 20 and 08 − 30

7. The most suitable aggregate for high strength concrete and for pavements is:
(a) Rounded aggregates
(b) Irregular aggregates
(c) Angular aggregates
(d) Flaky aggregates

8. The best method of placing concrete underwater is by:
(a) Pipes and pumps
(b) Bottom Dump Buckets
(c) Termie Pipe
(d) Filling cement bags with dry and semi-dry mix of cement and aggregates

9. A steel cube of 200 mm is placed at a depth of 4 km in sea. For steel E = 208 GPa, v = 0.29 and the density of sea water is 0.01 N/cm3 .The change in volume of the cube will be nearly: 
(a) 1710 mm3
(b) 1820 mm3
(c) 1940 mm3
(d) 2020 mm3

10. A block of material is subjected to a tensile strain of 12 × 10−6 and a compressive strain of 15 × 10−6 on planes at right angles to each other. There is also a shear strain of 12 × 10−6 and there is no strain on planes at right angles to the above planes. The direction of principal strains will be nearly:
(a) 24° and 114° 
(b) 10° and 100°
(c) 12° and 102°
(d) 100° and 190°
 

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