Raft foundations are used for: (A) Providing increased area of foundation over poor bearing capacity of soil (B) Spanning over small soft or loose pockets (C) Counter acting the hydrostatic effect (D) All the above

Raft foundations are used for:
(A) Providing increased area of foundation over poor bearing capacity of soil
(B) Spanning over small soft or loose pockets
(C) Counter acting the hydrostatic effect
(D) All the above
by

1 Answer

Answer :

Answer: Option D
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Related questions

The loose pockets in soil mass can be bridged safely by providing a raft foundation provided the soft area is smaller than (A) The column spacing (B) One-third the column spacing (C) Half the column spacing (D) Three-fourth the column spacing

Description : The loose pockets in soil mass can be bridged safely by providing a raft foundation provided the soft area is smaller than (A) The column spacing (B) One-third the column spacing (C) Half the column spacing (D) Three-fourth the column spacing

Last Answer : Answer: Option B

In case of foundations on black cotton soils, the most suitable method to increase the bearing capacity of soils is to (A) Increase the depth of foundation (B) Drain the soil (C) Compact the soil (D) Replace the poor soil

Description : In case of foundations on black cotton soils, the most suitable method to increase the bearing capacity of soils is to (A) Increase the depth of foundation (B) Drain the soil (C) Compact the soil (D) Replace the poor soil

Last Answer : Answer: Option D

Pick up the incorrect statement from the following: (A) The function of foundation is to distribute the load of super structure over a large bearing area (B) No timbering is required for shallow trenches (C) Shallow foundations can be constructed on made-up soil (D) Black cotton soil is very good for foundation bed

Description : Pick up the incorrect statement from the following: (A) The function of foundation is to distribute the load of super structure over a large bearing area (B) No timbering is required for shallow ... can be constructed on made-up soil (D) Black cotton soil is very good for foundation bed

Last Answer : Answer: Option D

For providing a raft foundation, the following activities are involved 1. Ramming the foundation bed 2. Excavation of the soil upto required depth 3. Laying the reinforcement over the foundation bed 4. Curing the cement concrete placed over reinforcement 5. Pouring the cement concrete over the reinforcement The correct sequence is (A) 1, 2, 3, 4, 5 (B) 5, 4, 3, 2, 1 (C) 2, 1, 3, 5, 4 (D) 3, 2, 5, 1,

Description : For providing a raft foundation, the following activities are involved 1. Ramming the foundation bed 2. Excavation of the soil upto required depth 3. Laying the reinforcement over the foundation bed 4. Curing the cement concrete placed over ... 2, 1 (C) 2, 1, 3, 5, 4 (D) 3, 2, 5, 1, 4

Last Answer : Answer: Option C

In soils possessing low bearing capacity, the type of foundation generally provided, is (A) Column footing (B) Grillage footing (C) Raft footing (D) All the above

Description : In soils possessing low bearing capacity, the type of foundation generally provided, is (A) Column footing (B) Grillage footing (C) Raft footing (D) All the above

Last Answer : Option D

While investigating the site, a thick layer of fairly firm clay over a deep layer of soft clay is encountered. In such a situation, the following type of foundation is useful: (A) Pile formation (B) Raft foundation (C) Grillage foundation (D) None of these

Description : While investigating the site, a thick layer of fairly firm clay over a deep layer of soft clay is encountered. In such a situation, the following type of foundation is useful: (A) Pile formation (B) Raft foundation (C) Grillage foundation (D) None of these

Last Answer : Answer: Option B

Which one of the following statements is true? (A) Clays are more porous than sands (B) Pressure of organic matter in a soil decreases the bearing capacity of the soil (C) Aluminous cement is used for foundations in soils with chemical deposits (D) All the above

Description : Which one of the following statements is true? (A) Clays are more porous than sands (B) Pressure of organic matter in a soil decreases the bearing capacity of the soil (C) Aluminous cement is used for foundations in soils with chemical deposits (D) All the above

Last Answer : (D) All the above

Black cotton soil is unsuitable for foundations because its (A) Bearing capacity is low (B) Permeability is uncertain (C) Particles are cohesive (D) Property to undergo a volumetric change due to variation of moisture content

Description : Black cotton soil is unsuitable for foundations because its (A) Bearing capacity is low (B) Permeability is uncertain (C) Particles are cohesive (D) Property to undergo a volumetric change due to variation of moisture content

Last Answer : Answer: Option D

The steel pile which is generally sunk in soft clay or loose sand of low bearing capacity, is (A) H-pile (B) Pipe pile (C) Screw pile (D) Disc pile

Description : The steel pile which is generally sunk in soft clay or loose sand of low bearing capacity, is (A) H-pile (B) Pipe pile (C) Screw pile (D) Disc pile

Last Answer : Answer: Option C

State the necessity of providing (i) Combined column footing and (ii) Raft foundation

Description : State the necessity of providing (i) Combined column footing and (ii) Raft foundation

Last Answer : (i) Combined column footing:- A combined footing provided as a column for two or more columns in a row. Combine footing is also provided when the columns are very near to each other and ... total individual footing area of all columns exceeds 50% of built up area of building at ground floor.

Grillage foundation (A) Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity (B) Is light and economical (C) Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth (D) All the above

Description : Grillage foundation (A) Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity (B) Is light and economical (C) Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth (D) All the above

Last Answer : Answer: Option D

To support a heavy structure in sandy soil, the type of foundation generally used, is (A) Combined footing (B) Raft footing (C) Pier footing (D) Strap footing

Description : To support a heavy structure in sandy soil, the type of foundation generally used, is (A) Combined footing (B) Raft footing (C) Pier footing (D) Strap footing

Last Answer : Answer: Option C

Allowable bearing pressure for a foundation depends upon (A) Allowable settlement only (B) Ultimate bearing capacity of soil only (C) Both allowable settlement and ultimate bearing capacity (D) None of above

Description : Allowable bearing pressure for a foundation depends upon (A) Allowable settlement only (B) Ultimate bearing capacity of soil only (C) Both allowable settlement and ultimate bearing capacity (D) None of above

Last Answer : (C) Both allowable settlement and ultimate bearing capacity

The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing (A) Cohesion and effective angle of shearing resistance (B) Cohesion and effective unit weight of soil (C) Effective unit weight of soil and effective angle of shearing resistance (D) Effective angle of shearing resistance

Description : The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing (A) Cohesion and effective angle of shearing resistance (B) Cohesion and effective ... weight of soil and effective angle of shearing resistance (D) Effective angle of shearing resistance

Last Answer : Answer: Option B

The bearing capacity of a water logged soil can be improved by (A) Compacting the soil (B) Draining the soil (C) Increasing the depth of foundation (D) Grouting

Description : The bearing capacity of a water logged soil can be improved by (A) Compacting the soil (B) Draining the soil (C) Increasing the depth of foundation (D) Grouting

Last Answer : Option B

The maximum bearing capacity of soil is that of (A) Black cotton soil (B) Loose fine sandy soil (C) Dry coarse sandy soil (D) Hard rocks

Description : The maximum bearing capacity of soil is that of (A) Black cotton soil (B) Loose fine sandy soil (C) Dry coarse sandy soil (D) Hard rocks

Last Answer : Answer: Option D

A raft foundation is provided if its area exceeds the plan area of the building by (A) 10 % (B) 20 % (C) 40 % (D) 50 %

Description : A raft foundation is provided if its area exceeds the plan area of the building by (A) 10 % (B) 20 % (C) 40 % (D) 50 %

Last Answer : Answer: Option D

The least bearing capacity of soil is that of (A) Hard rock (B) Moist clay (C) Soft rock (D) Coarse sandy soil

Description : The least bearing capacity of soil is that of (A) Hard rock (B) Moist clay (C) Soft rock (D) Coarse sandy soil

Last Answer : Answer: Option B

Increasing the liquor level in the evaporator results in the (A) Decreased capacity (B) Increase in liquor film co-efficient (C) Decreased effect of hydrostatic head (D) Increased true temperature drop

Description : Increasing the liquor level in the evaporator results in the (A) Decreased capacity (B) Increase in liquor film co-efficient (C) Decreased effect of hydrostatic head (D) Increased true temperature drop

Last Answer : (A) Decreased capacity

For a number of columns constructed in a rcjw, the type of foundation provided, is (A) Footing (B) Raft (C) Strap (D) Strip

Description : For a number of columns constructed in a rcjw, the type of foundation provided, is (A) Footing (B) Raft (C) Strap (D) Strip

Last Answer : Answer: Option D

The foundation in which a cantilever beam is provided to join two footings, is known as (A) Strip footing (B) Strap footing (C) Combined footing (D) Raft footing

Description : The foundation in which a cantilever beam is provided to join two footings, is known as (A) Strip footing (B) Strap footing (C) Combined footing (D) Raft footing

Last Answer : Answer: Option B

The maximum total settlement for raft foundation on clayey soils should be limited to (A) 25 mm (B) 25 to 40 mm (C) 40 to 65 mm (D) 65 to 100 mm

Description : The maximum total settlement for raft foundation on clayey soils should be limited to (A) 25 mm (B) 25 to 40 mm (C) 40 to 65 mm (D) 65 to 100 mm

Last Answer : Answer: Option D

For the construction of flyovers in sandy soils, the type of foundation provided, is (A) Strap footing (B) Raft footing (C) Combined footing (D) Pier footing

Description : For the construction of flyovers in sandy soils, the type of foundation provided, is (A) Strap footing (B) Raft footing (C) Combined footing (D) Pier footing

Last Answer : Answer: Option D

The type of footing which is used to transmit heavy loads through steel columns is (A) Raft foundation (B) Grillage foundation (C) Well foundation (D) Isolated footing

Description : The type of footing which is used to transmit heavy loads through steel columns is (A) Raft foundation (B) Grillage foundation (C) Well foundation (D) Isolated footing

Last Answer : Option B

Raft foundation are generally preferred to when the area required for individual footing, is more than (A) 25% to total area (B) 30% of total area (C) 40% to total area (D) 50% of total area

Description : Raft foundation are generally preferred to when the area required for individual footing, is more than (A) 25% to total area (B) 30% of total area (C) 40% to total area (D) 50% of total area

Last Answer : Option D

The foundation which consists of a thick reinforced cement slab covering whole area to support heavy concentrated structural loads, is known as (A) Combined footing (B) Strap footing (C) Raft footing (D) None of these

Description : The foundation which consists of a thick reinforced cement slab covering whole area to support heavy concentrated structural loads, is known as (A) Combined footing (B) Strap footing (C) Raft footing (D) None of these

Last Answer : Option C

Consider the following statements: 1. The benefit of surcharge and depth of foundation is only marginal in case of footings on purely cohesive soils. 2. The bearing capacity of a footing in pure clay increases with increase in size of the footing. 3. Size effects in plate load tests are more important in case of cohesionless soils. Which of these statements are correct? (a) 1, 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only

Description : Consider the following statements: 1. The benefit of surcharge and depth of foundation is only marginal in case of footings on purely cohesive soils. 2. The bearing capacity of a footing in pure clay increases with increase in size of the ... , 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only

Last Answer : (d) 1 & 3 only

Pile foundations are suitable for (A) Water logged soils (B) Soft rocks (C) Compact soils (D) Multi-storeyed buildings

Description : Pile foundations are suitable for (A) Water logged soils (B) Soft rocks (C) Compact soils (D) Multi-storeyed buildings

Last Answer : Answer: Option A

In soft clay of low bearing capacity, the type of steel pile generally used, is (A) H-pile (B) Screw pile (C) Disc pile (D) Pipe pile

Description : In soft clay of low bearing capacity, the type of steel pile generally used, is (A) H-pile (B) Screw pile (C) Disc pile (D) Pipe pile

Last Answer : Answer: Option B

raft increases with increase in forward speed for most of the implement, mainly due to a) More rapid acceleration of any soil particles that is moved appreciably b) More working width c) Increased working depth d) Draft decreases with increase in speed of implement

Description : raft increases with increase in forward speed for most of the implement, mainly due to a) More rapid acceleration of any soil particles that is moved appreciably b) More working width c) Increased working depth d) Draft decreases with increase in speed of implement

Last Answer : a) More rapid acceleration of any soil particles that is moved appreciably

One of the following is a shallow foundation a) Pile foundation b) Raft foundation* c) Under reamed pile foundation d) Well foundation

Description : One of the following is a shallow foundation a) Pile foundation b) Raft foundation* c) Under reamed pile foundation d) Well foundation

Last Answer : b) Raft foundation*

Explain raft foundation with neat sketch and explain its suitability.

Description : Explain raft foundation with neat sketch and explain its suitability. 

Last Answer : Raft Footing: It is suitable where ground is soft. Clayey or marshy having low bearing capacity, and where sub soil water conditions are uncertain. The raft foundation is also used to reduce settlement below highly compressible soils

Suggest suitable situation for Raft foundation and Pile foundation.

Description : Suggest suitable situation for Raft foundation and Pile foundation.

Last Answer : Suitability of Raft foundation:  1) Where the allowable bearing capacity of soil is less or the bridge load is heavy. 2) Where the hard soil is not available within 1.5m to 2.5m below the ... heavy scouring of river bed is expected. 4) Where heavy concentrated loads are to be taken by foundation.

The ultimate bearing capacity of a soil, is (A) Total load on the bearing area (B) Safe load on the bearing area (C) Load at which soil fails (D) Load at which soil consolidates

Description : The ultimate bearing capacity of a soil, is (A) Total load on the bearing area (B) Safe load on the bearing area (C) Load at which soil fails (D) Load at which soil consolidates

Last Answer : Answer: Option C

Consider the following statements relating to foundations on expansive soils: 1. Strength should be improved and compressibility should be reduced. 2. Compressibility should be increased. 3. No stabilization should be done. Which of these statements is/are correct? (a) 1, 2 & 3 (b) 2 only (c) 1 only (d) 3 only

Description : Consider the following statements relating to foundations on expansive soils: 1. Strength should be improved and compressibility should be reduced. 2. Compressibility should be increased. 3. No stabilization should be done. Which of these ... ? (a) 1, 2 & 3 (b) 2 only (c) 1 only (d) 3 only

Last Answer : (c) 1 only

Seepage through foundation in an earthen dam is controlled by providing (A) Rock toe (B) Horizontal blanket (C) Impervious cut off (D) Chimney drain

Description : Seepage through foundation in an earthen dam is controlled by providing (A) Rock toe (B) Horizontal blanket (C) Impervious cut off (D) Chimney drain

Last Answer : Answer: Option C

Explain the effect of water table on bearing capacity of soil.

Description : Explain the effect of water table on bearing capacity of soil.

Last Answer : Effect of water table on bearing capacity of soil: i. The rise in water table from below the foundation results in decrease in granular soil. ii. When the water table reaches the ... for bearing capacity calculations. ix. As ground water table rises accordingly bearing capacity of soil decreases.

When the slab is supported on all the four edges and the ratio of long span to short span is small, bending takes place along both the spans, such a slab is known as (a) Slab spanning in one direction (b) One way slab. (c) Slab spanning in two direction. (d) Two-way slab.

Description : When the slab is supported on all the four edges and the ratio of long span to short span is small, bending takes place along both the spans, such a slab is known as (a) Slab spanning in one direction (b) One way slab. (c) Slab spanning in two direction. (d) Two-way slab.

Last Answer : (d) Two-way slab.

The maximum permissible differential settlement, in case of foundations in clayey soil, is usually limited to (A) 10 mm (B) 20 mm (C) 30 mm (D) 40 mm

Description : The maximum permissible differential settlement, in case of foundations in clayey soil, is usually limited to (A) 10 mm (B) 20 mm (C) 30 mm (D) 40 mm

Last Answer : Answer: Option D

In case of foundations on sandy soil, maximum permissible differential settlement, is usually limited to (A) 15 mm (B) 25 mm (C) 35 mm (D) 45 m

Description : In case of foundations on sandy soil, maximum permissible differential settlement, is usually limited to (A) 15 mm (B) 25 mm (C) 35 mm (D) 45 mm

Last Answer : Answer: Option B

The most suitable bearing for carrying very heavy loads with slow speed is (a) Hydrodynamic bearing (b) ball bearing [IAS 1994] (c) Roller bearing (d) hydrostatic bearing

Description : The most suitable bearing for carrying very heavy loads with slow speed is (a) Hydrodynamic bearing (b) ball bearing [IAS 1994] (c) Roller bearing (d) hydrostatic bearing

Last Answer : (d) hydrostatic bearing

Assertion (A): Hydrostatic lubrication is more advantageous when compared to hydrodynamic lubrication during starting and stopping the journal in its bearing. Reason (R): In hydrodynamic lubrication, the fluid film pressure is generated by the rotation of the journal. [IES-1998] (a) Both A and R are individually true and R is the correct explanation of A (b) Both A and R are individually true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

Description : Assertion (A): Hydrostatic lubrication is more advantageous when compared to hydrodynamic lubrication during starting and stopping the journal in its bearing. Reason (R): In hydrodynamic lubrication, the fluid film pressure is ... (c) A is true but R is false (d) A is false but R is true

Last Answer : (b) Both A and R are individually true but R is not the correct explanation of A

Match List I with List II and select the : [IES-2002] List I (Bearings) List II (Load type) A. Hydrodynamic Journal bearing 1. High radial and thrust load combined B. Rectangular Hydrostatic bearing 2. Radial load only C. Taper Roller bearing 3. Thrust load only D. Angular contact ball bearing 4. Medium to low radial and thrust combined A B C D A B C D (a) 2 3 1 4 (b) 4 1 3 2 (c) 2 1 3 4 (d) 4 3 1 2

Description : Match List I with List II and select the : [IES-2002] List I (Bearings) List II (Load type) A. Hydrodynamic Journal bearing 1. High radial and thrust load combined B. Rectangular Hydrostatic bearing 2. Radial load only C. Taper Roller ... (a) 2 3 1 4 (b) 4 1 3 2 (c) 2 1 3 4 (d) 4 3 1 2

Last Answer : (a) 2 3 1 4

For hydrostatic lubrication (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space (B) There should be external source like pump to supply lubricant under pressure (C) There should be elastic deformation of the parts in contact (D) There should be metal to metal contact

Description : For hydrostatic lubrication (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space (B) There should be external source like pump to ... be elastic deformation of the parts in contact (D) There should be metal to metal contact

Last Answer : (B) There should be external source like pump to supply lubricant under pressure

In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Description : In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Last Answer : (B) The axis of journal is concentric with respect to axis of bearing

Boundary lubricated bearing is (A) Thick film bearing (B) Thin film bearing (C) Hydrodynamic bearing (D) Hydrostatic bearing

Description : Boundary lubricated bearing is (A) Thick film bearing (B) Thin film bearing (C) Hydrodynamic bearing (D) Hydrostatic bearing

Last Answer : (B) Thin film bearing

If we exclude the cost factor, which bearing is preferred? a) Hydrostatic b) Hydrodynamic c) Both are equally preferred d) Cannot be determined

Description : If we exclude the cost factor, which bearing is preferred? a) Hydrostatic b) Hydrodynamic c) Both are equally preferred d) Cannot be determined

Last Answer : a) Hydrostatic

The poor throw it away, the rich pick it up in their pockets , what's the point ?

Description : The poor throw it away, the rich pick it up in their pockets , what's the point ?

Last Answer : The poor throw it away and the rich pick it up in their pockets .

The maximum net pressure intensity causing shear failure of soil, is known (A) Safe bearing capacity (B) Net safe bearing capacity (C) Net ultimate bearing capacity (D) Ultimate bearing capacity

Description : The maximum net pressure intensity causing shear failure of soil, is known (A) Safe bearing capacity (B) Net safe bearing capacity (C) Net ultimate bearing capacity (D) Ultimate bearing capacity

Last Answer : (C) Net ultimate bearing capacity