Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 12

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 4051/ May’10

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     In fineness test of Ordinary Portland cement, the residue on I.S. sieve no. 9 should not be more than _____

b.     When fully saturated , the bulking of sand is ______

c.      The phenomenon by virtue of which the plastic cement paste changes into solid mass is known as _____

d.     In concrete, the only lubricant available is ____

e.      As the internal fraction of aggregates increases , workability ____

f.       The ratio of various ingredients in concrete of grade M150 is ____

g.     The appearance of water on the surface of concrete after compaction  is called _____

h.     The separation of coarse aggregates form cement water paste is called ______

i.       The concrete should not be placed during ________

j.       The mixing of water should be chilled in very hot weather by ______

State true of false.

a.     Accelerators are used during hot weather.

b.     The water cement ratio should not be kept constant.

c.      Quantity of cement is measured by volume.

d.     The curing rate of concrete is changed by temperature.

e.      Harshness results in porous concrete.

Section –B

Note : Attempt any ten questions

2.      

a.     Define concrete ?

b.     Differentiate between  ordinary concrete and controlled concrete?

c.      Name the main chemical compounds presents in Ordinary Portland cement?

d.      What do you understand by setting and hardening of cement ?

e.      Differentiate between volume batching and weight beaching?

f.       What is the effect of Gypsum on setting time ?

g.     What do you mean by segregation?

h.     Why concrete should be workable?

i.       Differentiate between accelerators and retarders in concrete?

j.       Why cement should not be allowed to come in moisture contact?

k.     Differentiate between initial setting and final setting of cement ?

l.       Why slum test is performed?

Section –C

Note : Attempt any three questions

3.     Define workability of concrete ? explain the various factors affecting workability

4.     Define curing ? explain the various methods of curing.

5.     Describe SLUMP test  for concrete ? what are the limitations of this test?

6.     Discuss various precautions required for hot weather concreting?

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Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 11

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5107/ May’10

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     The process of carrying the concrete mix form place of its mixing to final position of deposition is called_____

b.     The leveling operation that removes pumps and hollow and give a uniform concrete surface is called ________

c.      Any operation of concreting done at a temperature below ____ is known as cold weather concreting.

d.     Workability in the combination of homogeneity and _____

e.      A concrete which has a tendency to segregate will be ______

f.       The concrete mix which does not give smooth surface with a certain amount of water is called as ____

g.     Compressive s right in the resistance of concrete to _______

h.     The art of combining two or more size of    aggregates to get specified grading in known as

i.       Standard consistency can be measured by using ________

j.       The mortar fills the void in coarse aggregate to form ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­_______

Section –B

Note : Attempt any ten questions

2.     Give the uses of concrete in comparison to other building materials.

3.     What are the deleterious materials in aggregate?

4.     What is bulk density? Give its type

5.     Why aggregates are the important factors affectivity the workability ?

6.     Why does workability decrease with time?

7.     Explain the causes of segregation.

8.     Give the factors affecting durability

9.     Give the definition of

a.     Admixture

b.     Plasticizer

10.                        What are the application of fibre reinforced concrete ?

11.                        Explain the methods used for under water concreting

12.                        Why excessive compaction is not good for concrete ?

13.                        What are the methods of repairing cracks and holes?

14.                        What do you mean by honey combing

Section –C

Note : Attempt any three questions

1.       

a.     What is ready mixed concrete ?

b.     What is meant by grading of aggregates? What is the effect of grading on the quality of concrete ?

2.       

a.     What is water cement ratio? What is its importance in concrete strength ?

b.     What is the  purposes of using admixtures in concrete?

3.     Describe in detail Vee-Bee consist meter test to determine workability of concrete .

4.      

a.     What is cold weather concreting?

b.     What are he effects of storage on strength

5.     How will you cure the repaired work?

6.     What is the necessity of providing joints in concrete.

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Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 10

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 4051/ May’10

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     In fineness test of Ordinary Portland cement, the residue on I.S. sieve no. 9 should not be more than _____

b.     When fully saturated , the bulking of sand is ______

c.      The phenomenon by virtue of which the plastic cement paste changes into solid mass is known as _____

d.     In concrete, the only lubricant available is ____

e.      As the internal fraction of aggregates increases , workability ____

f.       The ratio of various ingredients in concrete of grade M150 is ____

g.     The appearance of water on the surface of concrete after compaction  is called _____

h.     The separation of coarse aggregates form cement water paste is called ______

i.       The concrete should not be placed during ________

j.       The mixing of water should be chilled in very hot weather by ______

State true of false.

a.     Accelerators are used during hot weather.

b.     The water cement ratio should not be kept constant.

c.      Quantity of cement is measured by volume.

d.     The curing rate of concrete is changed by temperature.

e.      Harshness results in porous concrete.

Section –B

Note : Attempt any ten questions

2.      

a.     Define concrete ?

b.     Differentiate between  ordinary concrete and controlled concrete?

c.      Name the main chemical compounds presents in Ordinary Portland cement?

d.      What do you understand by setting and hardening of cement ?

e.      Differentiate between volume batching and weight beaching?

f.       What is the effect of Gypsum on setting time ?

g.     What do you mean by segregation?

h.     Why concrete should be workable?

i.       Differentiate between accelerators and retarders in concrete?

j.       Why cement should not be allowed to come in moisture contact?

k.     Differentiate between initial setting and final setting of cement ?

l.       Why slum test is performed?

Section –C

Note : Attempt any three questions

3.     Define workability of concrete ? explain the various factors affecting workability

4.     Define curing ? explain the various methods of curing.

5.     Describe SLUMP test  for concrete ? what are the limitations of this test?

6.     Discuss various precautions required for hot weather concreting?

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Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 9

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5107/ May’09

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     The active group of concrete consists of _____ and ____

b.     Commonly used cement for constriction is known as ___cement.

c.      Due to smooth and rounded structure there is _______- locking among the rounded aggregates.

d.     Water cement ratio is weight of ____ weight of _____

e.      Compressive strength of concrete is expressed in ______

f.       1 bag of cement = _______ kg = _____ litres.

g.     Retarders are added to concrete to make ______-- weather concreting easy.

h.     Ready mixed concretes are very useful in _______ sites.

i.       For better mixing the tilting type mixer drum should be placed at an angle of _______ to vertical.

j.       Joints in beam and slabs should be formed at  points of minimum _____

Section –B

Note : Attempt any ten question

2.      

a.     What is cement? Why this material is so popular.

b.     Differentiate between fine and coarse aggregate.

c.      Give short notes on various characteristics of aggregates.

d.     State the water cement ratio law as given by Abram.

e.      How does size of aggregate effect workability?   

f.       What is nominal concrete mix?

g.     Why is blast furnace slag used as an admixture?

h.     What are the function and uses of an accelerator?

i.       What is the important of finishing?

j.       Name various types of joints?

k.     What do you mean by batching? Name its types.

l.       Give the stripping time for various types of work.

Section –C

Note : Attempt any three questions

3.       

a.     Name the various operations for making concrete.

b.     Write down the precautions while placing of concrete.

4.     What is the effect of hot weather on concreting operation and what precautions should be taken against it?

5.     Give the difference between nominal mix and controlled mix.

6.     Explain the various factors affecting workability?

7.     What is fineness modulus? Explain a method to determine the finesses modulus of an aggregate.

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Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 8

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 4051/ May’09

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     For controlled concrete quantity of sand is measured by ____

b.     The volume of one 590 kg bag of cement is _____

c.      Maximum quantity of water per bag of constant for M20 grade concrete required ______

d.     Finer the sand particles ______will be the bulking.

e.      The first compound of cement to react with water is ______

f.       The initial setting time of cement should not be ______30 minute.

g.     Plain concrete is very weak in ______

h.     Cement is always batched by _____

i.       Less the W/C ratio ____________ is the strength of concrete.

j.       The chemical reaction between cement and water is called ________ of cement.

Choose the correct one.

i.       Coaser the aggregate   ________ is the value of fineness modulus (higher/ lower)

j.       The maximum percentage of chemical ingredients in cement is that of ____(lime /silica)

k.     The separation of coarser particles of chemical ingredients in cement is that of ______(lime/silica )

l.       The separation of coarser particles of concrete during transportation is known as ____ (bleeding /segregation )

m.  A compacting factor of 0.85 for a concrete indicates a mix of ____workability (low /high)

n.     Fineness modulus number for coarse sand varies from ___(2.9 to 3.2/ 3.2 to 3.6)

Note: Attempt any ten questions

2.      

a.     Explain repair and maintenance of concrete.

b.     List methods of finishing concrete and explain any one.

c.      What are the various causes of form work failures?

d.     List the methods of mixing concrete and write advantages of tilting type mixer.

e.      Explain the suitability of different types of fibers used in fibres reinforced concrete.

f.       Describe the effect of hot weather on concrete.

g.     Define retarders and list some retarder materials.

h.     List the properties of concrete in plastic stage and explain any one.

i.       Explain how heat cement and its uses.

j.       Explain how size of aggregate affects the property of concrete.

k.     Discuss the various deleterious materials in aggregate.

l.       What are the various requirements of good aggregate?

Note : Attempt any three questions

3.     Define W/C ratio. What is the effect of various W/C ratio on the physical structure of cement.

4.     Define workability explain various factors those affects the workability.

5.     Explain the objects and methods of curing of concrete.

6.     Explain the advantages and disadvantages of concrete over other construction materials.

     

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Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 7

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 4051/ May’09

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     For controlled concrete quantity of sand is measured by ____

b.     The volume of one 590 kg bag of cement is _____

c.      Maximum quantity of water per bag of constant for M20 grade concrete required ______

d.     Finer the sand particles ______will be the bulking.

e.      The first compound of cement to react with water is ______

f.       The initial setting time of cement should not be ______30 minute.

g.     Plain concrete is very weak in ______

h.     Cement is always batched by _____

i.       Less the W/C ratio ____________ is the strength of concrete.

j.       The chemical reaction between cement and water is called ________ of cement.

Choose the correct one.

i.       Coaser the aggregate   ________ is the value of fineness modulus (higher/ lower)

j.       The maximum percentage of chemical ingredients in cement is that of ____(lime /silica)

k.     The separation of coarser particles of chemical ingredients in cement is that of ______(lime/silica )

l.       The separation of coarser particles of concrete during transportation is known as ____ (bleeding /segregation )

m.  A compacting factor of 0.85 for a concrete indicates a mix of ____workability (low /high)

n.     Fineness modulus number for coarse sand varies from ___(2.9 to 3.2/ 3.2 to 3.6)

Note: Attempt any ten questions

2.      

a.     Explain repair and maintenance of concrete.

b.     List methods of finishing concrete and explain any one.

c.      What are the various causes of form work failures?

d.     List the methods of mixing concrete and write advantages of tilting type mixer.

e.      Explain the suitability of different types of fibers used in fibres reinforced concrete.

f.       Describe the effect of hot weather on concrete.

g.     Define retarders and list some retarder materials.

h.     List the properties of concrete in plastic stage and explain any one.

i.       Explain how heat cement and its uses.

j.       Explain how size of aggregate affects the property of concrete.

k.     Discuss the various deleterious materials in aggregate.

l.       What are the various requirements of good aggregate?

Note : Attempt any three questions

3.     Define W/C ratio. What is the effect of various W/C ratio on the physical structure of cement.

4.     Define workability explain various factors those affects the workability.

5.     Explain the objects and methods of curing of concrete.

6.     Explain the advantages and disadvantages of concrete over other construction materials.

      

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Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 6

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5107/ May’09

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     The active group of concrete consists of _____ and ____

b.     Commonly used cement for constriction is known as ___cement.

c.      Due to smooth and rounded structure there is _______- locking among the rounded aggregates.

d.     Water cement ratio is weight of ____ weight of _____

e.      Compressive strength of concrete is expressed in ______

f.       1 bag of cement = _______ kg = _____ litres.

g.     Retarders are added to concrete to make ______-- weather concreting easy.

h.     Ready mixed concretes are very useful in _______ sites.

i.       For better mixing the tilting type mixer drum should be placed at an angle of _______ to vertical.

j.       Joints in beam and slabs should be formed at  points of minimum _____

Section –B

Note : Attempt any ten question

2.      

a.     What is cement? Why this material is so popular.

b.     Differentiate between fine and coarse aggregate.

c.      Give short notes on various characteristics of aggregates.

d.     State the water cement ratio law as given by Abram.

e.      How does size of aggregate effect workability?   

f.       What is nominal concrete mix?

g.     Why is blast furnace slag used as an admixture?

h.     What are the function and uses of an accelerator?

i.       What is the important of finishing?

j.       Name various types of joints?

k.     What do you mean by batching? Name its types.

l.       Give the stripping time for various types of work.

Section –C

Note : Attempt any three questions

3.       

a.     Name the various operations for making concrete.

b.     Write down the precautions while placing of concrete.

4.     What is the effect of hot weather on concreting operation and what precautions should be taken against it?

5.     Give the difference between nominal mix and controlled mix.

6.     Explain the various factors affecting workability?

7.     What is fineness modulus? Explain a method to determine the finesses modulus of an aggregate.

Read More

Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 5

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5161/ May’08

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     A good concrete should be prepared from _____ and durable aggregates.

b.     Initial setting time of OPC is _____ minutes.

c.      The water cement ratio law was established by _____

d.     Stump test performed determine the _____ of concrete.

e.      Cement bags should be stored _____ cm away from wall.

State true or false:

f.       Quantity of cement is measured by volume.

g.     Concrete mix 1:6:12 is used for mass concrete foundations.

h.     In concrete, the only lubricant available is wastes.

i.       Concrete is not fire resisting

j.       The curing rate of concrete is changed by temperature.

Choose the correct one.

k.     Strength of concrete (increases/decreases) with age.

l.       Large size of aggregates requires(more/less) cement.

m.  Segregation of concrete (increases / decreases) the strength of concrete.

n.     The slump is zero, then the mix (is/is not) suitable for high strength concrete.

o.     The ratio of cement, sand, coarse aggregate in m20 is (1:2:4,1:5:3,1:1:2)

Section –B

Note: attempt any ten questions.

2.       

a.     What are the desired properties of freshly mixed concrete?

b.     What are the physical properties of cement?

c.      Which cement will you use for mass concrete and why?

d.     What do you mean by segregation?

e.      What is a controlled concrete ?

f.       How will you store cement at site?

g.     What is volume batching of concrete?

h.     Define and list equipment used for had mixing of concrete ingredients.

i.       List and give brief description of vibration used for concreting.

j.       Define consistency of concrete, durability of concrete.

k.     Sketch one form work for rectangular column.

l.       List three air – entraining agents.

Section –C

Note : attempt nay three questions.

3.       

a.     Give a list of special types of concrete. Also give the uses of each.

b.     How will you carry out the fineness lest of cement and why is it advisable to check it for soundness?

c.      Write short note on

                                                             i.      Cold weather  concreting

                                                           ii.      Accelerators in concrete.

d.     Define workability of concrete and list four essentials of a workable concrete.   

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