During lime concreting in foundation the concrete shall consists of 10 cu m of brick ballast, 0.92 cu m of surkhi and 0.6 cu m of white lime in the proportion of 100:32:16 by volume.

During lime concreting in foundation if kankar lime is used 0.35 cu m of kanakar lime shall be used with 20 cu m ballast and no surkhi or sand or cinder shall be added.

A

True

B

False

During lime concreting in foundation coarse aggregate shall be of hard, well-burnt or over-burnt brick ballast of __________ mm gauge.

A

80 mm

B

10 mm

C

40 mm

D

3mm

During lime concreting in foundation fine aggregate shall be of surkhi or sand or cinder as specified, and clean and free from dust, dirt, and foreign matters.

A

True

B

False

The following statements (S1, S2, S3) pertain to mass concreting. Which of the following statements are correct? S1: The materials preferred for mass concrete are: Portland cement with low heat of hydration, Pozzolanas, Aggregates (coarse and fine), Water, Admixture, Coolants. S2: Slump of mass concrete shall be the same or more than ordinary concrete work. S3: Concrete with a low water cement ratio, correctly consolidated and properly cured provides durability to mass concrete work.

A

S1 and S2 only

B

S2 and S3 only

C

S1 and S3 only

D

S1, S2, S3

Statement (I): Lime-surkhi mortar is used in construction of Anicuts (dams) since the 19th century. Statement (II): Portland cement is a recent material compared to surkhi-mortar which is best suited for hydraulic structures.

A

Both Statement (I) and Statement (II) are individually true; and Statement (II) is the correct explanation of Statement (I)

B

Both Statement (I) and Statement (II) are individually true; but Statement (II) is NOT the correct explanation of Statement (I)

C

Statement (I) is true; but Statement (II) is false

D

Statement (I) is false; but Statement (II) is true.

Permeability in concrete is studied towards providing for, or guarding against, which of the following features? 1. The penetration by materials in solution may adversely affect the durability of concrete; moreover, aggressive liquids 'attack' the concrete. 2. In the case of reinforced concrete, ingress of moisture and air will result in corrosion of steel leading to an increase in the volume of steel, resulting in cracking and swilling of the concrete cover. 3. The moisture penetration depends on permeability and if the concrete can become saturated with water it is less vulnerable to frost action.

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

Inter coat shall be of stone ballast, or over burnt brick ballast of 50cm thick layer and consolidated and compacted by road roller to 0.8 cm.

A

True

B

False

There are two boxes. Box I contains one white card and two black cards and Box II contains one white card and a black card. Two persons P and Q play a game. P picks a card randomly from Box I. If P finds the white card, P wins and the game stops. If P finds the black card, Q draws a card randomly from Box II. If Q finds the white card Q wins. The game stops whether Q draws the white card or P draws the white card. Which one of the following is correct?

A

If P loses, Q wins

B

If Q loses, P wins

C

Both P and Q may win

D

Both P and Q may lose

For first class building the foundation and plinth shall be of 1st class brickwork in lime mortar or 1:2 cement mortar over lime concrete or 1:6:7 cement concrete.

A

True

B

False

Consider the following activities in a building construction:
1. Concreting of roof slabs
2. Brick-jelly lime concrete terracing
3. Erection of form work for slab
4. Construction of parapet wall in terrace
The correct sequence of these activities is

A

1, 3, 2, 4

B

3, 1, 4, 2

C

3, 1, 2, 4

D

1, 3, 4, 2

During lime concreting in foundation the concrete shall consists of 10 cu m of brick ballast, 0.92 cu m of surkhi and 0.6 cu m of white lime in the proportion of 100:32:16 by volume.

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