Concrete Technology MCQs

Question 1

While designing an air entrained concrete

Accepted Answer

all the above

Answer

water cement ratio is reduced

Answer

proportion of aggregates is reduced

Answer

an allowance for the entrained air is made

Question 2

An ideal ware house, is provided

Accepted Answer

all the above

Answer

water proof masonry walls

Answer

water proof roof

Answer

few windows which remain generally closed

Question 3

Pick up the incorrect statement from the following :

Accepted Answer

None of these

Answer

Space between the exterior walls of a warechouse and bag piles should be 30 cm

Answer

Cement bags should preferably be piled on wooden planks

Answer

Cement bags should be placed such that bags of one layer does not touch the bags of the adjacent layer

Question 4

The specifications of a cement bag for storage, are

Accepted Answer

all the above

Answer

weight 50 kg

Answer

height 18 cm

Answer

plan area 3000 sq cm

Question 5

'Ware house pack' of cement means

Accepted Answer

pressure compaction of the bags on lower layers

Answer

full capacity of the ware house

Answer

pressure exertion of the bags of upper layers

Answer

packing the ware house

Question 6

If the effective plan area of a warehouse is 54 sq m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is

Accepted Answer

2700 bags

Answer

2000 bags

Answer

2200 bags

Answer

2400 bags

Question 7

The internal dimensions of a ware house are 15 m x 56 m, and the maximum height of piles is 270 m, the maximum number of bags to be stored in two piles, are

Accepted Answer

3000 bags

Answer

1500 bags

Answer

2000 bags

Answer

2500 bags

Question 8

Pick up the incorrect statement from the following :

Accepted Answer

With passage of time, the strength of cement increases

Answer

With passage of time, the strength of cement decreases

Answer

After a period of 24 months, the strength of cement reduces to 50%

Answer

The concrete made with storage deteriorated cement, gains strength with time

Question 9

To ensure constant moisture content in aggregates

Accepted Answer

all the above

Answer

area of each aggregate pile should be large

Answer

height of each aggregate pile should not exceed 150 m

Answer

aggregate pile should be left for 24 hours before aggregates are used