CIVIL ENGINEERING MCQ – PART:08
1. The main constituent which contributes for strength of cement is
(a) Silica(b) Alumina
(c) Lime
(d) Iron Oxide
(e) Magnesium oxide
2. When water is added to cement and mixed, it forms a paste which gradually becomes hard. The time taken for the entire process is called
(a) Setting time(b) Elapsed time
(c) Calculated time
(d) Consolidated time
(e) Strength time
3. Cement which has less expansive qualities when mixed with water is termed
(a) Fitness(b) Solidification
(c) Soundness
(d) Calcinated
(e) Hydrated
4. Unsoundness of cement may be controlled by
(a) Limiting the MgO content to less than 0.5%(b) Fine grinding
(c) Allowing the cement for aeration for several days and
(d) Through mixing
(e) All the above
5. The reaction of silicates and aluminates of cement with water forms a binding medium which solidifies into a hardened mass which is termed as
(a) Hydration(b) Water tightening
(c) Solidification
(d) Liberation
(e) Contraction
6. An inactive part of cement is called the insoluble residue. The maximum allowable value is
(a) 0.50%(b) 0.65%
(c) 0.70%
(d) 0.80%
(e) 0.85%
7. Clinker from the kiln is cooled and then ground in a ball mill with the addition of __________ of gypsum.
(a) 1 to 2%(b) 2 to 3%
(c) 3 to 4%
(d) > 3%
(e) > 5%
8.
Out
of the constituents of cement like Tri-calcium silicate, Di-Calcium silicate, Tri-calcium
aluminate, the first to set and harden is
(a) Tri-calcium
silicate
(b) Di-calcium
silicate
(c) Tri-calcium
aluminate
(d) (a) and (b) above
(e) All set
simultaneously
9.
Portland
slag cement is made by inter grinding Portland Cement clinker and
(a) Dicalcium
silicate
(b) Granulated blast furnace waste
(c) 4% of Gypsum
(d) Magnesium
oxide
(e) Free lime
10. Hydrophobic Portland cement is produced by
inter-grinding Portland cement with 0.1 to 0.4%
(a) Dilute
Hydrochloric acid
(b) Hydrogen per
oxide
(c) Stearic acid
(d)
Sulphur-di-oxide
(e) Calcium
chloride
11. In quick setting cement the compared added is
(a) Aluminium Sulphate
(b) Gypsum
(c) Aluminium
silicate
(d) Calcium
sulphate
(e) Magnesium
sulphate
12. Fineness of cement is represented by specific surface
which is expressed as total surface area in
(a) Square cm
(b) Square cm/gm
(c) Cubic cm/gm
(d) Gm/square cm
(e) Gm/cm
13. Le Chatelier’s apparatus is used to find the
__________ of cement.
(a) Initial
setting time
(b) Final setting
time
(c) Soundness
(d) Strength
(e) Consistency
14. Strength of cement is found from conducting test on.
(a) Cement mortar cube of 1:3 mix
(b) Cement mortar
cylinder of 1:3 mix
(c) Cement mortar
cube of 1:4 mix
(d) Cement
concrete cube of 1:2:4
(e) Cement
concrete of cylinder 1:1½:2
15. Brazilian test is conducted to find the __________
strength
(a) Compress
(b) Bending
(c) Shear
(d) Tensile
(e) Bond
16. Ratio of percentage of alumina to that of
iron oxide in
Ordinary Portland Cement is
(a) > 0.70
(b) = 0.80
(c) ≮ 0.66
(d) 
0.66
(e) Between 0.80 and 0.90
17. Loss on ignition in cement should
(a) be equal to
0.30%
(b) 4%
(c) < 2%
(d) Between 2 to
2.5%
(e) None of the
above
18. Coarse sand is one which is passing through a screen
with clear openings of
(a) 3.18 mm
(b) 2.18 mm
(c) 1.38 mm
(d) 8.31 mm
(e) 1.81 mm
19. The fineness modulus of sand should be between
(a) 1 and 2
(b) 2 and 3
(c) 3 and 4
(d) 4 and 5
(e) 5 and 7
20. Water is taken as free from organic matter if the pH value
lies between
(a) 8 and 10
(b) 9 and 10
(c) 6 and 8
(d) 4 and 6
(e) 3 and 5
21. Presence of salts in water should __________.
(a) be 8000 ppm
(b) not be greater
than 15000 ppm
(c) not be greater
than 25000 ppm
(d) not be greater than 10000 ppm
(e) be between
34000 to 26000 ppm
22. Cement performs the following functions when used in
cement mortar. Choose the correct one
(a) Primarily
fills the voids formed by fine aggregates
(b) Binds the fine
aggregates into a solid mass with time when added with water to the mix
(c) Impacts
strengths after setting
(d) Only (b) and
(c)
(e) (a), (b) and (c)
23. Surkhi is another form of fine aggregate which is
usually prepared by powdering
(a) Limestones
(b) Unburnt slag
(c) Unburnt bricks
(d) Furnace waste
(e) Sandstone
24. For external walls without protection the grade of
cement mortar to be used is
(a) MM 2
(b) > MM
3
(c) MM7.5
(d) MM 5 to MM 7
(e) < MM 2
25. Fire-resistant mortar is obtained by adding aluminuous
cement to the finely ground powder of
(a) Half-burnt
bricks
(b) Slag
(c) Fly-ash
(d) Fire-bricks
(e) Table-moulded
bricks
26. Packing mortar is a special type of mortar possessing
the property of
(a) High
homogeneity and water resistance
(b) Pre-determined
setting time
(c) Ability to
form solid and water proof plugs
(d) (b) and (c)
only
(e) (a), (b) and (c)
27. For sound-absorbing mortar the type of crushed
aggregate used is
(a) Uniformly
graded gravel
(b) Light-weight porous material
(c)
Well-graded strong aggregate
(d) Poorly-graded
sandstone
(e) River-pebbles
28. X-ray shielding mortar is obtained from cement,
admixtures and
(a) Light-weight
porous pumice
(b) Uniformly
graded sand
(c) Coarse sand
(d) Crushed heavy rocks
(e) Crushed
cinders
29. The cement mortar used for pointing works is
(a) 1.5 to 1.6
(b) 1.3 to 1.4
(c) 1:6
(d) 1:3
(e) 1:1 to 1:2
30. Strength of cement concrete depends on
(a) Quality of
water
(b) Quality of
aggregate
(c) Quantity of
aggregate
(d) Quality of
cement
(e) Water-cement ratio
31. Super plasticizers permit reduction of water up to
__________ without reduction in workability.
(a) 10%
(b) 20%
(c) 30%
(d) 40%
(e) 50%
32. The commonly used retarder is
(a) Calcium sulphate
(b) Potassium
sulphate
(c) Barium
sulphate
(d) Sulpur
chloride
(e) Calcium
chloride
33. Accelerators are used in situations as given below.
Choose the correct one
(a) Early removal
of formwork
(b) Reducing the
period of curing
(c) Accelerating
the setting time in cold weather
(d) Energy repair
work
(e) All the above
34. Different air entraining agents behave differently
depending on the elasticity of the film of the bubble formed and the extent to
which the __________ is reduced.
(a) Compressive
force
(b) Surface Tension
(c) Shear force
(d) Torsion
(e) Bond stress
35. Surface loss of water from concrete depends upon
(a) Air
temperature
(b) Relative
Humidity
(c) Wind velocity
(d) Fresh concrete
temperature
(e) All the above
36. Curing of concrete is done by
(a) Spraying
method
(b) Bonding method
(c) Covering with
moist cloth
(d) Covering with
moist sand
(e) Any of the above methods
37. The minimum water cement ratio required for a workable
concrete is
(a) 0.4
(b) 0.5
(c) 0.6
(d) 0.7
(e) 0.8
38. Cement concrete grading is based on the characteristic
compressive strength of 150 mm cube at __________ days.
(a) 7
(b) 15
(c) 21
(d) 28
(e) 30
39. M 45 Grade Designation is given to __________
concrete.
(a) Ordinary
(b) Low strength
(c) Standard
(d) Medium
Strength
(e) High Strength
40. Separation of water on fresh concrete is called
(a) Segregation
(b) Honeycombing
(c) Hydration
(d) Bleeding
(e) Dilution
41. Bulking of sand, occurs due to
(a) Viscosity
(b) Capillary
action
(c) Surface tension
(d) Moisture in
voids
(e) Air in voids
42. Under-compaction makes the concrete
(a) Impermeable
(b) Segregated
(c) Lean
(d) Thin
(e) Tough
43. Exterior application of rendering made on concrete
structure is denoted as
(a) Smooth finish
(b) Applied finish
(c) Rough finish
(d) Clean finish
(e) None of the
above
44. Slump test is the most commonly used method of
measuring __________ of concrete
(a) Consistency
(b) Compactness
(c) Toughness
(d) Rigidity
(e) Hardness
45. Normally strength of cylindrical specimens tested
under compression is taken as __________ times the compressive strength of
cubical specimens.
(a) 0.95
(b) 0.90
(c) 0.85
(d) 0.80
(e) 0.75
46. Schmidt’s Rebound Hammer is a commonly adopted
non-destructive equipment for measuring the
(a) Surface cracks
(b) Cracks at the
bottom of the member
(c) Adequacy of
reinforcement
(d) Surface hardness
(e) Mix proportion
47. Gamma-rays transmission method is particularly used to
measure the __________ of concrete slabs of known density.
(a) Formation of
cracks
(b) Thickness
(c) Compactness
(d) Rigidity
(e) Flexibility
48. In order to get the best quality lime it is recommended
to have __________ of clay.
(a) 8 to 30%
(b) 5 to 15%
(c) 25 to 40%
(d) 40 to 60%
(e) 35 to 80%
49. The process of adding water to lime to convert it to
hydrated lime is known as
(a) Calcination
(b) Watering
(c) Quenching
(d) Slaking
(e) Hydration
50. In acid test,
abundant efflorescence indicates high percentage of
(a) Sodium
carbonate
(b) Calcium carbonate
(c) Potassium
carbonate
(d) Sodium
sulphate
(e) Calcium
sulphate