Concrete Technology and Design

201. Stress strain curve of high tensile steel

1. Has a definite yield point
2. Does not show definite yield point but yield point is defined by 0.1% proof stress
3. Does not show definite yield point but yield point is defined by 0.2% proof stress
4. Does not show definite yield point but yield point is defined by 2% proof stress,

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202. The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be

1. Between 150 to 300 kg/cm²
2. Between 350 to 600 kg/cm²
3. Between 150 to 500 kg/cm²
4. Below 200 kg/cm²

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203. The aggregate containing moisture in pores and having its surface dry, is known as

1. Moist aggregates
2. Very dry aggregates
3. Dry aggregates
4. Saturated surface dry aggregate

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204. The aggregate impact value of the aggregate used in

1. Building concrete is less than 45
2. Road pavement concrete is less than 30
3. Runway concrete is less than 30
4. All the above

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205. The approximate value of the ratio between direct tensile strength and flexural strength is

1. 0.33
2. 0.5
3. 0.75
4. 1

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206. The average permissible stress in bond for plain bars in tension is

1. Increased by 10% for bars in compression
2. Increased by 25% for bars in compression
3. Decreased by 10% for bars in compression
4. Decreased by 25% for bars in compression

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207. The bulk density of aggregates does not depend upon:

1. Size and shape of aggregates
2. Specific gravity of aggregates
3. Grading of aggregates
4. Size and shape of the container

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208. The bulk density of aggregates, depends upon

1. Shape
2. Grading
3. Compaction
4. All the above

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209. The bulk density of aggregates, is generally expressed as

1. tonnes/cubic metre
2. kg/cubic metre
3. kg/litre
4. g/cm³

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210. The cement becomes useless if its absorbed moisture content exceeds

1. 1 %
2. 2 %
3. 3 %
4. 5 %

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