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.

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 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.

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

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.

Statement I): Incrustation of sand occurs in rapid sand filter when water softened by lime-soda is fed in for filtration. Statement II): The sand gets coated with precipitates of Ca(OH)2 and Mg(OH)2 generated during softening of water by lime-soda process which leads to incrustation of sand.

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

The influence of shape of aggregate in strength and workability of concrete are given below in statements S1, S2, S3 and S4. Which of the statements are correct? S1: Rounded aggregate produces concrete with high workability and low strength. S2: Angular aggregate produces concrete with high workability and low strength. S3: Rounded aggregate produces concrete with low workability and high strength. S4: Angular aggregate produces concrete with low workability and high strength.

A

S3 and S4

B

S2 and S3

C

S1 and S2

D

S1 and S4

Consider the following statements in the context of the Clean Energy Ministerial (CEM): 1. It is a global forum to promote policies and programs that advance clean energy technology and to encourage the transition to a global clean energy economy. 2. India is a participating nation in the Clean Energy Ministerial. 3. India has denied to participate in the programme ‘21st Century Power’ under Clean Energy Ministerial. Which of the above statements are correct?

A

2 and 3 only

B

1 and 3 only

C

1 and 2 only

D

1, 2 and 3

Which of the following statements are wholly correct regarding broken-brick aggregate useable in concretes? 1. Broken-brick aggregate is obtained by crushing waste bricks, and it has a density varying between 1000 kg/m3 — 1200 kg/m3. 2. Such aggregate is used in concrete for the foundation in light buildings, floorings, and walkways. 3. Such aggregate may also be used in light-weight reinforced concrete floors.

A

1 and 2 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult.
Why are ants called the 'Earth's' most successful species?

A

Because they have been on earth for more than a 100 million years

B

Because they can be found anywhere on earth

C

Because they have been on earth for more than a 100 million years and because they can be found anywhere on earth

D

Because there are 2000 different species of ants on earth

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult. Antennae are used by ants to

A

leave a trail for other ants

B

communicate

C

find direction

D

\touch and feel each other

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.

Related Questions