### Concrete Technology and Design

**1. **'Ware house pack' of cement means

- Full capacity of the ware house
- Pressure exertion of the bags of upper layers
- Pressure compaction of the bags on lower layers
- Packing the ware house

Correct answer: (C)

Pressure compaction of the bags on lower layers

**2. **1% of voids in a concrete mix would reduce its strength by about

- 5%
- 10%
- 15%
- 20%

**3. **A beam curved in plan is designed for

- Bending moment and shear
- Bending moment and torsion
- Shear and torsion
- Bending moment, shear and torsion

Correct answer: (D)

Bending moment, shear and torsion

**4. **A concrete having a slump of 6.5 cm, is said to be

- Dry
- Earth moist
- Semi-plastic
- Plastic

Correct answer: (D)

Plastic

**5. **A concrete using an air entrained cement

- Has strength less than 10% to 15%
- Has more resistance to weathering
- Is more plastic and workable
- Is free from segregation and bleeding

Correct answer: (C)

Is more plastic and workable

**6. **A construction joint is provided where

- Bending moment is small
- Shear force is small
- The member is supported by other member
- All the above

Correct answer: (D)

All the above

**7. **A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

- 1.5
- 2
- 2.5
- 3

**8. **A flaky aggregate is said to be elongated if its length is

- Equal to the mean size
- Twice the mean size
- Thrice the mean size
- Four times the mean size

Correct answer: (B)

Twice the mean size

**9. **A higher modular ratio shows

- Higher compressive strength of concrete
- Lower compressive strength of concrete
- Higher tensile strength of steel
- Lower tensile strength of steel

Correct answer: (B)

Lower compressive strength of concrete

**10. **A T-shaped retaining wall mainly consists of

- One cantilever
- Two cantilevers
- Three cantilevers
- Four cantilevers

Correct answer: (C)

Three cantilevers