Rebound hammer is used for a) To find the strength of concrete* b) To form rivet heads c) To break the concrete structures d) None of the above

Rebound hammer is used for
a) To find the strength of concrete*
b) To form rivet heads
c) To break the concrete structures
d) None of the above
by

1 Answer

Answer :

a) To find the strength of concrete*
by

Related questions

Renewal of loose rivet shall be taken up in end bearing stiffener when the % of hammer loose rivet is

Description : Renewal of loose rivet shall be taken up in end bearing stiffener when the % of hammer loose rivet is

Last Answer : 30%

The weight of rivet testing hammer is

Description : The weight of rivet testing hammer is

Last Answer : 110 gm

Explain the rebound hammer test procedure and show the relationship between compressive strength and rebound number with hammer horizontal and vertical on dry and wet surface of concrete.

Description : Explain the rebound hammer test procedure and show the relationship between compressive strength and rebound number with hammer horizontal and vertical on dry and wet surface of concrete.

Last Answer : Rebound Hammer Test: i. Initially the plunger of rebound hammer is Kept touching to the target concrete surface ii. Then the tubular casing of hammer is pushed towards concrete, so that the spring gets ... of concrete will be less, But if it is more, then concrete possess sufficient strength.

The diameter of hole for 20 dia rivet shall be a) 23 mm b) 18 mm c) 21.5 mm* d) 22 mm

Description : The diameter of hole for 20 dia rivet shall be a) 23 mm b) 18 mm c) 21.5 mm* d) 22 mm

Last Answer : c) 21.5 mm*

The length of the countersunk head rivet shank is, when L = length of the rivet, G = length of grip in mm; D = Dia of rivet in mm a) L =G +0.5 D + 1mm for every 4 mm of grip or part thereof * b) b) L =G +0.5 D + 1mm c) L =G +0.5 D d) None of the above

Description : The length of the countersunk head rivet shank is, when L = length of the rivet, G = length of grip in mm; D = Dia of rivet in mm a) L =G +0.5 D + 1mm for every 4 mm of grip or part thereof * b) b) L =G +0.5 D + 1mm c) L =G +0.5 D d) None of the above

Last Answer : a) L =G +0.5 D + 1mm for every 4 mm of grip or part thereof *

he length of the snap head rivet shank is, when L = length of the rivet, G = length of grip in mm; D = Dia of rivet in mm a) L =G +1.5 D + 1mm for every 4 mm of grip or part thereof * b) b) L =G +0.5 D + 1mm c) L =G +0.5 D d) None of the above

Description : he length of the snap head rivet shank is, when L = length of the rivet, G = length of grip in mm; D = Dia of rivet in mm a) L =G +1.5 D + 1mm for every 4 mm of grip or part thereof * b) b) L =G +0.5 D + 1mm c) L =G +0.5 D d) None of the above

Last Answer : a) L =G +1.5 D + 1mm for every 4 mm of grip or part thereof *

The property of soil which allows it to be deformed rapidly, without rupture, without elastic rebound and without volume change is known as a) Porosity b) Plasticity* c) Stiffness d) Plastic limit

Description : The property of soil which allows it to be deformed rapidly, without rupture, without elastic rebound and without volume change is known as a) Porosity b) Plasticity* c) Stiffness d) Plastic limit

Last Answer : b) Plasticity*

Draw a neat and labelled sketch of rebound hammer and write two limitations of it.

Description : Draw a neat and labelled sketch of rebound hammer and write two limitations of it.

Last Answer : Labelled sketch of rebound hammer: Limitations of Rebound hammer test: 1. Rebound of hammer may get affected due to roughness of concrete surface. 2. The age of concrete also varies with ... coarse aggregate may affect rebound number. 5. Size and shape of specimen also affect hammer impact.

State the importance of NDT and state working principle of Rebound hammer.

Description : State the importance of NDT and state working principle of Rebound hammer.

Last Answer : Importance of NDT: 1. The strength can be tested without physical breaking of concrete; hence it is safe. 2. It can give internal flaws, cavities and homogeneity details of concrete within short period. 3. ... . But if rebound of hammer is less, then tested concrete may be soft, porous and moist. 

The approximate ratio between the strength of cement concrete at seven days and 28 days is a) 3/ 4 b) 2/3* c) 1/2 d) 1/3

Description : The approximate ratio between the strength of cement concrete at seven days and 28 days is a) 3/ 4 b) 2/3* c) 1/2 d) 1/3

Last Answer : b) 2/3*

Ultrasonic Pulse Velocity test is meant for a) Identifying the integrity of concrete* b) Finding the strength of concrete c) To know the crack in steel structure d) To know the flaw in rail

Description : Ultrasonic Pulse Velocity test is meant for a) Identifying the integrity of concrete* b) Finding the strength of concrete c) To know the crack in steel structure d) To know the flaw in rail

Last Answer : a) Identifying the integrity of concrete*

In flange splices when the number of hammer and hand loose rivets is 30% or more of the total rivets on any side of the splice location, a) Need no be renewed b) wait for 100% loose rivets c) all the rivets should be renewed.* d) None of the above

Description : In flange splices when the number of hammer and hand loose rivets is 30% or more of the total rivets on any side of the splice location, a) Need no be renewed b) wait for 100% loose rivets c) all the rivets should be renewed.* d) None of the above

Last Answer : c) all the rivets should be renewed.*

Renewal of slack rivets should be taken up in steel girder bridges: a) All rivets which are hand loose or which have lost 50% of their head by corrosion. b) All hammer loose rivets where corrosion has set in between the head and the plate. c) In end stiffeners when the percentage of hammer loose rivets is >30% d) All the above*

Description : Renewal of slack rivets should be taken up in steel girder bridges: a) All rivets which are hand loose or which have lost 50% of their head by corrosion. b) All hammer loose rivets where corrosion has set ... . c) In end stiffeners when the percentage of hammer loose rivets is >30% d) All the above*

Last Answer : d) All the above*

If concrete compression test fails, should Schmidt hammer test be adopted as an alternative test to prove the concrete strength?

Description : If concrete compression test fails, should Schmidt hammer test be adopted as an alternative test to prove the concrete strength?

Last Answer : The Scmidt hammer test is based on the elastic rebound of hammer which presses on concrete surface and it measures the surface hardness of concrete. Since the test is very sensitive to the ... strength of concrete. Therefore, it may not be considered a good substitute for concrete compression test.

The main drawback of centrifugal pump is a)necessity of priming b) discharge from pump varies with the load of water c) For high heads efficiency is low up to 50% d) the suction lift is limited to 6 metre e) all of the above*

Description : The main drawback of centrifugal pump is a)necessity of priming b) discharge from pump varies with the load of water c) For high heads efficiency is low up to 50% d) the suction lift is limited to 6 metre e) all of the above*

Last Answer : e) all of the above*

Strength of a rivet is a. Strength in shear b. Strength in crushing c. Strength in tension d. None

Description : Strength of a rivet is a. Strength in shear b. Strength in crushing c. Strength in tension d. None

Last Answer : d. None

S code for Steel structures is a) IS 236 b) IS 226 c) IS 456 d) IS 800*

Description : S code for Steel structures is a) IS 236 b) IS 226 c) IS 456 d) IS 800*

Last Answer : d) IS 800*

Select the incorrect statement [ A ] R.C.C has better fire resistance than steel [ B ] R.C.C. structure is economical than steel structure [ C ] Strength of concrete decreases as age increases [ D ] R.C.C can be used for under water and marine structures

Description : Select the incorrect statement [ A ] R.C.C has better fire resistance than steel [ B ] R.C.C. structure is economical than steel structure [ C ] Strength of concrete decreases as age increases [ D ] R.C.C can be used for under water and marine structures

Last Answer : [ C ] Strength of concrete decreases as age increases

What is the full form UTS of rails a. Ultimate technical Strength b. Ultimate tensile Strength* c. Upper Top surface d. None of above

Description : What is the full form UTS of rails a. Ultimate technical Strength b. Ultimate tensile Strength* c. Upper Top surface d. None of above

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Number of Elastic clips used for one K to BG single line section having 13 length & concrete sleepers of M+7 sleeper density are (a) 5280 (b) 6160* (c) 6250 (d) 6500

Description : Number of Elastic clips used for one K to BG single line section having 13 length & concrete sleepers of M+7 sleeper density are (a) 5280 (b) 6160* (c) 6250 (d) 6500

Last Answer : (b) 6160*

Which type of following cement is used for mass concrete work a) High Alumina cement b) Quick setting cement c) Rapid hardening cement d) Low heat cement*

Description : Which type of following cement is used for mass concrete work a) High Alumina cement b) Quick setting cement c) Rapid hardening cement d) Low heat cement*

Last Answer : d) Low heat cement*

The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate

Description : The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate

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1. Which of the statements with regard to formation is correct (1) One of the Functions of the formation is to facilitate drainage (2) Width of bank for double railway line is 12.155 meters (3) Width of cutting for double railway track is 11.750 meters (4) Centre to centre of formation for double line is 4.725 meters (5) Width of formation is different for concrete sleeper track and other than concrete sleeper track a) 2, 3, 5 b) 3, 4, 5* c) 2, 3, 4 d) 2, 4, 5

Description : 1. Which of the statements with regard to formation is correct (1) One of the Functions of the formation is to facilitate drainage (2) Width of bank for double railway line is 12.155 meters (3) Width of cutting for double railway track is 11. ... a) 2, 3, 5 b) 3, 4, 5* c) 2, 3, 4 d) 2, 4, 5

Last Answer : b) 3, 4, 5*

The concrete under water minimum grade of cement recommended by IS code a) M 10 b) M 15 c) M 20* d) M 25

Description : The concrete under water minimum grade of cement recommended by IS code a) M 10 b) M 15 c) M 20* d) M 25

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CC Crib stands for a) Cement concrete b) Criss crossing c) Christ church* d) None of the above

Description : CC Crib stands for a) Cement concrete b) Criss crossing c) Christ church* d) None of the above

Last Answer : c) Christ church*

Cement pressure grouting is suitable for a) Very fine crack b) weathered concrete c) Active crack where cause of crack is known and remedial action has been taken* d) Crushed masonry

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Last Answer : c) Active crack where cause of crack is known and remedial action has been taken

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Last Answer : d) all the above*

Temporary staging for casting PSC Box Girder for a ROB over the Railway span shall be removed a) after hardening of concrete b) before hardening of concrete c) during concreting d) after stressing the cables

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UCC is abbreviated for (a) Uncontrolled cement concrete (b) Unified Control Command (c) Unified Command Centre* (d) none of them

Description : UCC is abbreviated for (a) Uncontrolled cement concrete (b) Unified Control Command (c) Unified Command Centre* (d) none of them

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Loading capacity of chain drive system is based on a) Rate of wear b) Ultimate strength of chain material c) None of (a) and (b) d) Both (a) and (b)

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Le Chatelier apparatus is used to determine which of the following properties for cement A) Soundness* b) Initial setting time c) Compressive strength d) Tensile strength

Description : Le Chatelier apparatus is used to determine which of the following properties for cement A) Soundness* b) Initial setting time c) Compressive strength d) Tensile strength

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fter storage, strength of cement a) Decreases* b) Increases c) Remains same d) Depends upon the type of cement

Description : fter storage, strength of cement a) Decreases* b) Increases c) Remains same d) Depends upon the type of cement

Last Answer : a) Decreases*

In which of the following directions, the strength of timber is maximum a) Parallel to grains* b) 45 degree to grains c) Perpendicular to grains d) same in all directions

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he minimum compressive strength of first class brick should be a) 75 kg per centimeter square b) 90 kg per centimeter square c) 100 kg per centimeter square* d) 120 kg per centimeter square

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AA saturated clay is to be tested for shearing strength. Which test should be recommended? a) Direct shear test b) Triaxial shear test c) Vane shear test d) Unconfined compression*

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Piping in a soil mass is a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit* b) Caused due to very low exit gradient c) Due to continuous passage of water through a series of well connected pores d) Due to loss of the strength of cohesion less soil because of upward flow of of water

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Last Answer : a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit*

Quicksand is a) Moist sand containing a small percentage of clay b) Is a condition which generally occurs in coarse sands c) Is a condition in which cohesive properties of soil increase rapidly d) Is a condition in which a cohesion less soil loses its strength because of upward flow of water

Description : Quicksand is a) Moist sand containing a small percentage of clay b) Is a condition which generally occurs in coarse sands c) Is a condition in which cohesive properties of soil increase rapidly d) Is a condition in which a cohesion less soil loses its strength because of upward flow of water

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Last Answer : c) The shearing strength against flowing is a small but definite

The side slope of formation in embankment /cutting depends on a) Shearing strength of soil and its angle of repose* b) Angle of repose c) Bearing capacity of the soil d) Optimum moisture content of the soil

Description : The side slope of formation in embankment /cutting depends on a) Shearing strength of soil and its angle of repose* b) Angle of repose c) Bearing capacity of the soil d) Optimum moisture content of the soil

Last Answer : a) Shearing strength of soil and its angle of repose*

The strength of a bridge is termed as MBG loading of 1987. MBG refers to a) Model Broad Gauge b) Modified Budget Grant c) Model Budget grant d) Modified Broad Gauge*

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“Composite sleeper index” is employed to determine a) sleeper density requirement b) number of fixtures required for a particular type of sleeper c) durability of sleeper d) mechanical strength of wooden sleepers and thereby gives its suitability as to be used as li sleepers.*

Description : “Composite sleeper index” is employed to determine a) sleeper density requirement b) number of fixtures required for a particular type of sleeper c) durability of sleeper d) mechanical strength of wooden sleepers and thereby gives its suitability as to be used as li sleepers.*

Last Answer : d) mechanical strength of wooden sleepers and thereby gives its suitability as to be used as li sleepers.*

Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area? (A) Sea walls, bulk heads and groynes (B) Sea walls, bulk heads and revetments (C) Sea walls, revetments and groynes (D) Bulk heads, revetments and groynes

Description : Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area? (A) Sea walls, bulk heads and groynes (B) Sea walls, bulk heads and revetments (C) Sea walls, revetments and groynes (D) Bulk heads, revetments and groynes

Last Answer : (B) Sea walls, bulk heads and revetments

I talk, but I do not speak my mindI hear words, but I do not listen to thoughtsWhen I wake, all see meWhen I sleep, all hear meMany heads are on my shouldersMany hands are at my feetThe strongest steel cannot break my visageBut the softest whisper can destroy meThe quietest whimper can be heard. -Riddles

Description : I talk, but I do not speak my mindI hear words, but I do not listen to thoughtsWhen I wake, all see meWhen I sleep, all hear meMany heads are on my shouldersMany hands are at ... strongest steel cannot break my visageBut the softest whisper can destroy meThe quietest whimper can be heard. -Riddles

Last Answer : An Actor

I need a solution for my broken sprinkler heads, like a concrete pad?

Description : I need a solution for my broken sprinkler heads, like a concrete pad?

Last Answer : Need Answer

What types of industry use blind rivet equipment?

Description : What types of industry use blind rivet equipment?

Last Answer : Most types of manufacturing industries, such as chemical and car manufacturers, use blind rivet equipment. Blind rivet equipment is used in industries that make items where rivet joints can only be accessed from one side, such as plastic piping and some aircraft parts.

What is Rivet and Riveting?

Description : What is Rivet and Riveting?

Last Answer : A rivet is a small, cylindrical and smooth shaft whose one end is swollen (called Head) while the other end is flat. Hot rivets are used to join the metal plates. The process in which two metal plates are joined together by means of rivets is called riveting.

According to Unwin's formula, the diameter of a rivet of plate of thickness is : (A) d = 6.05 t (B) d = 1.5 t + 4 (C) d = t(D) d = t + 1.5

Description : According to Unwin's formula, the diameter of a rivet of plate of thickness is :  (A) d = 6.05 t (B) d = 1.5 t + 4  (C) d = t (D) d = t + 1.5 

Last Answer : (A) d = 6.05 t

The weakest section of a diamond riveting, is the section which passes through (A) First row (B) Second row (C) Central row (D) One rivet hole of end row

Description : The weakest section of a diamond riveting, is the section which passes through  (A) First row  (B) Second row  (C) Central row  (D) One rivet hole of end row 

Last Answer : (A) First row

Failure of riveted joints is due to (A) Tearing of the plates between the rivet hole and the edge of the plate (B) Tearing of plates between rivets (C) Shearing of rivets (D) All the above

Description : Failure of riveted joints is due to  (A) Tearing of the plates between the rivet hole and the edge of the plate  (B) Tearing of plates between rivets  (C) Shearing of rivets  (D) All the above 

Last Answer : (D) All the above