Concrete Technology and Design

261. The operation of removing humps and hollows of uniform concrete surface, is known as

  1. Floating
  2. Screeding
  3. Trowelling
  4. Finishing

Correct answer: (B)
Screeding

262. The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

  1. 0.15
  2. 0.12
  3. 0.3
  4. 1:00

Correct answer: (B)
0.12

263. The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is

  1. 30 %
  2. 40 %
  3. 50 %
  4. 60 %

Correct answer: (C)
50 %

264. The percentage of voids in cement is approximately

  1. 25 %
  2. 40 %
  3. 60 %
  4. 80 %

Correct answer: (B)
40 %

265. The permissible diagonal tensile stress in reinforced brick work is

  1. About 0.1 N/mm2
  2. Zero
  3. 0.3 N/mm2 to 0.7 N/mm2
  4. About 1.0 N/mm2

Correct answer: (A)
About 0.1 N/mm2

266. The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

  1. 5 kg/cm2
  2. 8 kg/cm2
  3. 10 kg/cm2
  4. 15 kg/cm2

Correct answer: (D)
15 kg/cm2

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

  1. Placing
  2. Wetting
  3. Curing
  4. Compacting

Correct answer: (C)
Curing

268. The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than

  1. 30 minutes
  2. 40 minutes
  3. 60 minutes
  4. 90 minutes

Correct answer: (A)
30 minutes

269. The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known

  1. Grading
  2. Curing
  3. Mixing
  4. Batching

Correct answer: (D)
Batching

270. The produce impermeable concrete

  1. Thorough mixing of concrete is required
  2. Proper compaction of concrete is required
  3. Proper curing of concrete is required
  4. All the above

Correct answer: (D)
All the above

Previous
Page 27 of 33
Next
Copyright © EngineeringMCQ.com