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Multiple choice question for engineering

Set 1

1. The _________ compressive strength required from structural consideration.
a) Nominal
b) Minimum
c) Maximum
d) No

View Answer

Answer: b [Reason:] Option d can be eliminated easily because we need atleast some compressive strength. The minimum compressive strength required from structural consideration.

2. The adequate workability necessary for _________ compaction with the compacting equipment available.
a) Half
b) Quarter
c) Full
d) Double

View Answer

Answer: c [Reason:] Option d can be eliminated easily because double compaction is not possible. The adequate workability necessary for full compaction with the compacting equipment available.

3. __________ water-cement ratio content to give adequate durability for the particular site conditions.
a) Minimum
b) Nominal
c) .5
d) Maximum

View Answer

Answer: d [Reason:] Maximum water-cement ratio and/or maximum cement content to give adequate durability for the particular site conditions. It helps to avoid shrinkage cracking due to temp cycle in mass concrete.

4. _________ cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.
a) Minimum
b) Nominal
c) .5
d) Maximum

View Answer

Answer: d [Reason:] Maximum cement content to avoid shrinkage cracking due to temperature cycle in mass concrete. It gives adequate durability for the particular site condition.

5. __________ has designated the concrete mixes into a number of grades as M10, M15.
a) IS 456-2000
b) IS 456-2010
c) IS 513-1999
d) IS 465-2000

View Answer

Answer: a [Reason:] IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40.

6. What is the approx. mix proportion for M10?
a) 1:3:6
b) 1:2:4
c) 1:1.5:3
d) 1:1:2

View Answer

Answer: a [Reason:] According to IS 456-2000 code, the approximate value of mix proportion for grade M10 is 1:3:6.

7. What is the approx. mix proportion for M15?
a) 1:3:6
b) 1:2:4
c) 1:1.5:3
d) 1:1:2

View Answer

Answer: b [Reason:] According to IS 456-2000 code, the approximate value of mix proportion for grade M15 is 1:2:4.

8. What is the approx. mix proportion for M20?
a) 1:3:6
b) 1:2:4
c) 1:1.5:3
d) 1:1:2

View Answer

Answer: c [Reason:] According to IS 456-2000 code, the approximate value of mix proportion for grade M20 is 1:1.5:3.

9. What is the approx. mix proportion for M25?
a) 1:3:6
b) 1:2:4
c) 1:1.5:3
d) 1:1:2

View Answer

Answer: d [Reason:] According to IS 456-2000 code, the approximate value of mix proportion for grade M25 is 1:1:2.

10. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by __________
a) IS 456-2000
b) IS 456-2010
c) IS 513-1999
d) IS 465-2000

View Answer

Answer: a [Reason:] Option can be eliminated because there is no such code. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by IS 456:2000.

Set 2

1. IS code for Specification for ordinary Portland cement, 33 grade?
a) IS 269:1989
b) IS 383:197
c) IS 455:1989
d) IS 456:2000

View Answer

Answer: a [Reason:] IS 269:1989 code is for specification for ordinary Portland cement of 33 grade. This standard covers the manufacture and chemical and physical requirements of ordinary Portland cement.

2. IS code for Specification for coarse and fine aggregates from natural sources for concrete?
a) IS 269:1989
b) IS 383:197
c) IS 455:1989
d) IS 456:2000

View Answer

Answer: b [Reason:] IS 383:1970 – Specification for coarse and fine aggregates from natural sources for concrete.

3. IS code for Specification for Portland slag cement?
a) IS 269:1989
b) IS 383:197
c) IS 455:1989
d) IS 456:2000

View Answer

Answer: c [Reason:] IS 455:1989 is for specification for Portland slag cement to the need of civil engineering.

4. IS Code of practice for plain and reinforced concrete.
a) IS 269:1989
b) IS 383:197
c) IS 455:1989
d) IS 456:2000

View Answer

Answer: d [Reason:] IS 456:2000 Code of practice for plain and reinforced concrete to the need of civil engineering.

5. IS 457:1957 is for _____
a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures
b) Specification for Portland pozzolana cement flyash based
c) Specification for Portland pozzolana cement calcined clay based
d) Methods of test for pozzolanic materials

View Answer

Answer: a [Reason:] IS 457:1957 Code of practice for general construction of plain and reinforced concrete for dams and other massive structures.

6. IS 1489(Part 1):1991 is for ___________
a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures
b) Specification for Portland pozzolana cement Part 1 Flyash based
c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based
d) Methods of test for pozzolanic materials

View Answer

Answer: b [Reason:] IS 1489(Part 1):1991 Specification for Portland pozzolana cement Part 1 Flyash based.

7. IS 1489(Part 2):1991 is for ______________
a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures
b) Specification for Portland pozzolana cement Part 1 Flyash based
c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based
d) Methods of test for pozzolanic materials

View Answer

Answer: c [Reason:] IS 1489(Part 2):1991 Specification for Portland-pozzolana cement: Part 2 Calcined clay based.

8. IS 1727:1967 is for ____________
a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures
b) Specification for Portland pozzolana cement Part 1 Fly ash based
c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based
d) Methods of test for pozzolanic materials

View Answer

Answer: d [Reason:] IS 1727:1967 Methods of test for pozzolanic materials to the need of civil engineering.

9. IS 650:1991 is for _____________
a) Specification for standard sand for testing of cement
b) Methods of samplingand analysis of concrete
c) Specification for pozzolana cement
d) Methods of test for pozzolanicmaterials

View Answer

Answer: a [Reason:] IS 650:1991 Specification for standard sand for testing of cement to the need of civil engineering.

10. IS 1199:1959 is for __________
a) Specification for standard sand for testing of cement
b) Methods of samplingand analysis of concrete
c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based
d) Methods of test for pozzolanicmaterials

View Answer

Answer: a [Reason:] IS 1199:1959 Methods of sampling and analysis of concrete to the need of civil engineering.

Set 3

1. Air entrainment in concrete increases ____________
a) Strength
b) Workability
c) The effect of temp variations
d) The unit weight

View Answer

Answer: b [Reason:] There are following types of Air entrainment in concrete which helps to increase the workability.

2. In a dry environment, concrete strength will be loosed as much as ___________ % in moist environment.
a) 30
b) 40
c) 50
d) 60

View Answer

Answer: c [Reason:] Laboratory tests show that concrete strength will be loosed as much as 50% in dry environment as compared to moist environment.

3. Concrete placed in cold weather will take ____________ time to gain strength.
a) No
b) Less
c) More
d) Equal to hot weather

View Answer

Answer: c [Reason:] Concrete placed in cold weather will take longer time to gain strength, delaying form removal and subsequent construction.

4. After finishing concrete surface must be kept ___________
a) Dry
b) First dry it and then wet it
c) First wet it and then dry it
d) Wet

View Answer

Answer: d [Reason:] After finishing concrete surface must be kept wet, so that it’d be prevented from evaporation.

5. Dry intervals in surface wetting leads to ___________
a) Cracking
b) Fogging
c) High strength
d) Good workability

View Answer

Answer: a [Reason:] Dry intervals or patches can lead to crazing or cracking on the slab surface.

6. Which one is not chemical admixtures?
a) Accelerators
b) Retarders
c) Water-reducing agents
d) Silica fume

View Answer

Answer: d [Reason:] Accelerators, retarders, water reducing agents are the chemical admixtures and silica fumes is mineral admixtures.

7. Damp proofing ____________ resist water well enough.
a) Does
b) Does not
c) Doesn’t effect
d) Depends on the temperature

View Answer

Answer: b [Reason:] Damp proofing does not resist water well enough to prevent oversaturation from ground water, or excessive and constant humidity.

8. Chemically active pore fillers ____________ the setting of concrete.
a) Retards
b) Decrease
c) Accelerates
d) No change

View Answer

Answer: c [Reason:] Chemically active pore fillers accelerates the setting of concrete and thus render the concrete more impervious at early age.

9. Chemically inactive pore fillers ____________ the workability.
a) Decrease
b) Increase
c) Don’t affect
d) Improve

View Answer

Answer: d [Reason:] Chemically inactive pore fillers improve the workability and to facilitate the reduction of water for given workability and to make dense concrete which is basically impervious.

10. “Water repelling materials like soda, potash soaps, etc make the concrete pervious”. Is this statement true or false?
a) True
b) False

View Answer

Answer: b [Reason:] Water repelling materials like soda, potash soaps, calcium soaps, waxes, fats, vegetable oils repel water and make the concrete impervious.

Set 4

1. Creep is ____________
a) Time dependent
b) Time independent
c) Pressure dependent
d) Temperature dependent

View Answer

Answer: a [Reason:] It is the time-dependent deformation that occurs on the prolonged application of stress.

2. If creep effect is considered at a given load, the modulus determined is referred to as ______
a) Short term modulus of elasticity
b) Elasticity
c) Long term modulus of elasticity
d) Creep effect

View Answer

Answer: c [Reason:] If creep effect is considered at a given load, the modulus determined is referred to as long term modulus of elasticity.

3. If θ is creep coefficient then what is Elong?
a) Eshort /(1+θ)
b) Eshort *(1+θ)
c) Eavg /(1+θ)
d) Eavg *(1+θ)

View Answer

Answer: a [Reason:] Eshort /(1+θ), Where θ is creep coefficient and Creep coefficient is the ratio of creep strain to elastic strain.

4. Concrete exhibits initial elastic strain which depends on __________
a) Magnitude of applied stress
b) Rate of applied stress
c) Magnitude and rate of applied stress
d) Elastic modulus

View Answer

Answer: c [Reason:] Concrete exhibits initial elastic strain which depends on the magnitude and rate of applied stress.

5. This strain increases over time due to _________
a) Creep
b) Elastic modulus
c) Short term modulus of elasticity
d) Long term modulus of elasticity

View Answer

Answer: a [Reason:] This strain increases over time due to creep where the concrete will experience inelastic deformation.

6. If the stress is removed, the specimen shows an instantaneous recovery strain ___ the elastic strain on loading.
a) Higher than
b) Lower than
c) Equal to
d) Much greater than

View Answer

Answer: b [Reason:] If the stress is removed, the specimen shows an instantaneous recovery strain lower than the elastic strain on loading, followed by gradual decrease in strain (creep recovery) over time.

7. According to Lamond and Pielert, it’s the ____ that exhibits creep upon application of load on a concrete specimen.
a) Aggregates
b) Water
c) Cement paste
d) Admixtures

View Answer

Answer: c [Reason:] According to Lamond and Pielert, it’s the cement paste that exhibits creep upon application of load on a concrete specimen.

8. When concrete is loaded it experiences a large strain upon loading known as
a) Differential elastic strain
b) Instantaneous elastic strain
c) Differential inelastic strain
d) Instantaneous inelastic strain

View Answer

Answer: b [Reason:] When concrete is loaded it experiences a large strain upon loading known as the instantaneous elastic strain.

9. Aggregate has therefore a direct effect on the long-term deformations of concrete because __________
a) Low elastic modulus aggregate will produce a stiffer concrete that will have relatively higher resistance to deformation
b) High elastic modulus aggregate will produce a stiffer concrete that will have relatively higher resistance to deformation
c) High elastic modulus aggregate will produce a stiffer concrete that will have relatively lower resistance to deformation
d) Low elastic modulus aggregate will produce a stiffer concrete that will have relatively lower resistance to deformation

View Answer

Answer: b [Reason:] Aggregate has therefore a direct effect on the long-term deformations of concrete because a high elastic modulus aggregate will produce a stiffer concrete that will have relatively higher resistance to deformation.

10. Creep ___ as the age of application of load _____
a) Increase, increase
b) Increase, decrease
c) Decrease, decrease
d) Decrease, increase

View Answer

Answer: d [Reason:] Creep decreases as the age of application of load increases, because strength increases.

Set 5

1. What is curing?
a) Dehydration
b) Hydration
c) Drying
d) Dipping

View Answer

Answer: b [Reason:] Curing refers to hydration, the chemical process by which concrete hardens once it is poured.

2. In a dry environment, concrete strength will be loosed as much as _________ % in moist environment.
a) 30
b) 40
c) 50
d) 60

View Answer

Answer: c [Reason:] Laboratory tests show that concrete strength will be loosed as much as 50% in dry environment as compared to moist environment.

3. Concrete placed in cold weather will take __________ time to gain strength.
a) No
b) Less
c) More
d) Equal to hot weather

View Answer

Answer: c [Reason:] Concrete placed in cold weather will take longer time to gain strength, delaying form removal and subsequent construction.

4. After finishing concrete surface must be kept _________
a) Dry
b) First dry it and then wet it
c) First wet it and then dry it
d) Wet

View Answer

Answer: d [Reason:] After finishing concrete surface must be kept wet, so that it’d be prevented from evaporation.

5. Dry intervals in surface wetting leads to __________
a) Cracking
b) Fogging
c) High strength
d) Good workability

View Answer

Answer: a [Reason:] Dry intervals or patches can lead to crazing or cracking on the slab surface.

6. Contractors place blankets over the concrete to ____________
a) Increase the rate of evaporation
b) Slow the rate of evaporation
c) To increase the strength
d) Ease to do work

View Answer

Answer: b [Reason:] A more common practice is for contractors to place blankets over the slab surface to slow the rate of evaporation.

7. Well cured concrete _________ thermal, plastic & drying shrinkage cracks.
a) Doesn’t affect
b) Maximize
c) Minimize
d) Create

View Answer

Answer: c [Reason:] Well cured concrete can minimize thermal, plastic & drying shrinkage cracks, making concrete more water tight, thus preventing moisture and water borne chemicals from entering into the concrete.

8. Which method is the most common and cheaper for water curing?
a) Ponding
b) Sprinkling
c) Mist curing
d) Wet covering

View Answer

Answer: a [Reason:] Ponding is the most common and inexpensive method of curing flat surfaces such as floor slabs, flat roofs, pavements and other horizontal surfaces.

9. The hydration that provides the initial mix and chemical bond of the concrete’s ingredients is the
a) First step
b) Second step
c) Third step
d) Fourth step

View Answer

Answer: a [Reason:] The hydration that provides the initial mix and chemical bond of the concrete’s ingredients is the first step, but in order for the slab to be properly prepared for its final finish or flooring.

10. What is the full form of rH?
a) Rhesus factor
b) Relative humidity
c) Rush hour
d) Radio head

View Answer

Answer: b [Reason:] Relative Humidity (RH) is the ratio of the amount of water vapor in the air at a specific temperature to the maximum amount that the air could hold at that temperature.