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Concrete Technology Online Exam Quiz

Important questions about Concrete Technology. Concrete Technology MCQ questions with answers. Concrete Technology exam questions and answers for students and interviews.

1. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

Options

A : 30%

B : 40%

C : 50%

D : 60%

2. Separation of coarse aggregates from mortar during transportation, is known

Options

A : bleeding

B : creeping

C : segregation

D : shrinkage

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

Options

A : placing

B : wetting

C : curing

D : compacting

5. The internal dimensions of a ware house are 15 m x 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are

Options

A : 1500 bags

B : 2000 bags

C : 2500 bags

D : 3000 bags

7. The light weight aggregates are obtained from

Options

A : sedimentary rocks

B : metamorphic rocks

C : igneous rocks

D : volcanic source.

8. The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is

Options

A : 1 : 2 : 4

B : 1 : 3 : 6

C : 1 : : 3

D : 1 : 1 : 2

9. Permissible compressive strength of M 200 concrete grade is

Options

A : 100 kg/cm 2

B : 150 kg/cm 2

C : 200 kg/cm 2

D : 250 kg/cm 2

10. Pick up the incorrect statement applicable to the field test of good cement.

Options

A : When one thrusts one's hand into a bag of cement, one should feel warm

B : The colour of the cement is bluish

C : A handful of cement thrown into a bucket of water should sink immediately

D : By rubbing cement in between fingers, one should feed rough

1. Pozzolana cement is used with confidence for construction of

Options

A : dams

B : massive foundations

C : abutments

D : R.C.C. structures

3. The most useless aggregate is one whose surface texture is

Options

A : smooth

B : granular

C : glassy

D : honey combed and porous.

4. Efflorescence in cement is caused due to an excess of

Options

A : alumina

B : iron oxide

C : silica

D : alkalis

5. The shrinkage of concrete

Options

A : is proportional to water content is the mix

B : is proportional to cement concrete

C : increases with age of concrete

D : all the above.

6. The diameter of the Vicat plunger is 10 mm and its length varies from

Options

A : 20 mm to 30 mm

B : 30 mm to 40 mm

C : 40 mm to 50 mm

D : 50 mm to 60 mm

7. Allowable shear strength of concrete, depends upon

Options

A : shear strength

B : tensile strength

C : compressive strength

D : none of these.

8. While designing an air entrained concrete

Options

A : water cement ratio is reduced

B : proportion of aggregates is reduced

C : an allowance for the entrained air is made

D : strength of the concrete, is reduced

9. Concrete containing

Options

A : silicious aggregates, has higher co-efficient of expansion

B : igneous aggregates, has intermediate coefficient of expansion

C : lime stones, has lowest co-efficient of expansion

D : All the above.

10. According to Water-Cement Ratio Law, the strength of workable plastic concrete

Options

A : depends upon the amount of water used in the mix

B : does not depend upon the quality of cement mixed with aggregates

C : does not depend upon the quanity of cement mixed with aggregates

D : all the above.

1. The factor which affects workability, is

Options

A : water content and its temperature

B : shape and size of the aggregates

C : grading and surface textures of the aggregates

D : air entraining agents

2. To hydrate 500kg of cement full water needed, is

Options

A : 100 kg

B : 110 kg

C : 120 kg

D : 130 kg

3. Pick up the incorrect statemnt from the following. For performing compressive strength test of cement

Options

A : cement and standard sand mortar are used in the ratio of 1 : 3

B : water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency

C : A cube mould of 10 cm x 10 cm x 10 cm is used

D : The perpared moulds are kept in a atmosphere of 50% relative humidity

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