Q.1

Water required per bag of cement, is

  • 7 kg
  • 14 kg
  • 21 kg
  • 28 kg
  • 35 kg
Q.2

Pick up the correct statement from the following:

  • Lime in excess, causes the cement to expand and disintegrate
  • Silica in excess, causes the cement to set slowly
  • Alumina in excess, reduces the strength of the cement
  • Magnesium oxide in excess, remains in free state and makes the cement unsound
  • All the above.
Q.3

Addition of pozzolana to ordinary port land cement, causes

  • decrease in early strength
  • reduction in chemical action with sulphates
  • increase in shrinkage
  • reduction bleeding
  • all the above.
Q.4

The process of hardening the concrete by keeping its surface moist is known

  • placing
  • wetting
  • curing
  • compacting
  • none of these.
Q.5

Pick up the incorrect statement from the following:

  • The bottom and top ends of slump mould are parallel to each other
  • The axis of the mould is perpendicular to the end faces
  • The internal surface of the mould is kept clean and free from set cement
  • The mould is in the form of a frustum of hexagonal pyramid
  • None of these.
Q.6

Batching error means inaccuracy in the quantity of

  • aggregates
  • cement
  • water
  • all the above.
Q.7

Too wet concrete may cause

  • weakness of concrete
  • excessive laitance
  • segregation
  • lower density
  • all the above.
Q.8

The grade of concrete not recommended by I.S. :is

  • M 100
  • M 200
  • M 300
  • M 400
  • M 500
Q.9

ISI has specified full strength of concrete after

  • 7 days
  • 14 days
  • 21 days
  • 28 days
  • none of these.
Q.10

Pick up the correct statement from the following i.

  • Higher workability indicates unexpected increase in the moisture content
  • Higher workability indicates deficiency of sand
  • If the concrete mix is dry, the slump is zero
  • Concrete mix having zero slump, is unsuitable for high strength.
  • All the above.
Q.11

Concrete containing

  • silicious aggregates, has higher co-efficient of expansion
  • igneous aggregates, has intermediate coefficient of expansion
  • lime stones, has lowest co-efficient of expansion
  • All the above.
Q.12

Addition of pozzolana to cement causes

  • reduction in permeability
  • loss of heat of hydration
  • reduction in bleeding
  • increase in curing time
  • all the above.
Q.13

C.R.R.I. charts are used to obtain a relatioship between strength of concrete and

  • water cement ratio
  • workability
  • grading of aggregate
  • fineness modulus
  • none of these.
Q.14

For construction of structures in sea water, the cement generally preferred to, is

  • Portland-pozzolana cement
  • quick setting cement
  • low heat Portland cement
  • rapid hardening cement
  • none of these.
Q.15

You are asked to construct a massive dam, the type of cement you will use, is

  • ordinary Portland cement
  • rapid hardening cement
  • low heat cement
  • blast furnace slag cement
  • white cement.
Q.16

The most useless aggregate is one whose surface texture is

  • smooth
  • granular
  • glassy
  • honey combed and porous.
Q.17

The compaction of concrete, improves

  • density
  • strength
  • durability
  • all the above.
Q.18

Pick up the correct statement from the following:

  • Water cement paste hardens due to hydration
  • During hardening cement binds the aggregates together
  • Cement provides strength, durability and water tightness to the concrete
  • All the above.
Q.19

The final operation of finishing floors, is known as

  • screeding
  • floating
  • trowelling
  • finishing
  • all the above.
Q.20

For a good concrete

  • aggregates should be hard and durable
  • cement should be sufficient to produce the required strength
  • water should be free from organic materials
  • mixing of ingredients should be done thoroughly so as to produce homogeneity
  • All the above.
Q.21

Cement used for normal concrete construction, is obtained by burning a mixture of

  • silicious and argillaceous materials
  • argilaceous and calcareous materials
  • silicious and catcareous materials
  • silicious, argillaceous and calcareous materials
  • none of these.
Q.22

The dimensions of alitre forma for measuring aggregates by volume, are :

  • length 30 cm, breadth 25 cm, height 30 cm
  • length 39 cm, breadth 25 cm, height 32 cm
  • length 27 cm, breadth 27 cm, height 48 cm
  • length 220 cm, breadth 25 cm, height 40 cm
  • none of these.
Q.23

Pick up the incorrect statement from the following:

  • Space between the exterior walls of a warechouse and bag piles should be 30 cm
  • Cement bags should preferably be piled on wooden planks
  • Cement bags should be placed such that bags of one layer does not touch the bags of the adjacent layer
  • Width and height of the pile should not exceed 3 m and 2.70 m respectively
  • None of these.
Q.24

The light weight aggregates are obtained from

  • sedimentary rocks
  • metamorphic rocks
  • igneous rocks
  • volcanic source.
Q.25

The internal dimensions of a ware house arem x 5.6 m, and the maximum height of piles is 2.m, the maximum number of bags to be stored in two piles, are

  • 1500 bags
  • 2000 bags
  • 2500 bags
  • 3000 bags
  • 4000 bags
Q.26

If the effective plan area of a warehouse issq. m, and maximum height of piles permitted iscm, the number of cement bags to be stored, is

  • 2000 bags
  • 2200 bags
  • 2400 bags
  • 2700 bags
  • 3000 bags
Q.27

Pick up the correct statement from the following:

  • The concrete gains strength due to hydration of cement
  • The concrete cured at a temperature below 23°C, gains strength up to 28 days
  • The concrete does not set at freezing point
  • The strength of concrete increases with its age
  • All the above.
Q.28

The shuttering of a hall measuring 4 m x 5 m, can be removed after

  • 5 days
  • 7 days
  • 10 days
  • 14 days
  • 21 days
Q.29

Pozzolanic properties exist in

  • shales
  • fly ash
  • pumicite
  • diatomaceous clay
  • all the above.
Q.30

Pick up the incorrect statement from the following:

  • Tricalcium silicate (C3S) hydrates rapidly
  • Tricalcium silicate (C3S) generates more heat of hydration
  • Tricalcium silicate (C3S) develops early strength
  • Tricalcium silicate (C3S) has more resistance to sulphate attack
  • None of these.
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