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

State the importance of NDT and state working principle of Rebound hammer.
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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. It avoids wastage of concrete, hence becomes economical up to certain extent. 4. It is applicable in any type and position of concrete members shows wide applicability. 5. Its results are simple and easy to interpret.

Working principle of Rebound hammer: Rebound hammer test method is based on the principle that the rebound of an elastic mass attached to plunger i.e. rebound number depends on the hardness of the concrete surface against which the mass strikes. If the rebound of hammer is more, it indicates surface is hard, solid and dry. But if rebound of hammer is less, then tested concrete may be soft, porous and moist. 
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Related questions

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

Description : 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

Last Answer : a) To find the strength of concrete*

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.

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.

Give principle construction and working of hammer mill with neat diagram.

Description : Give principle construction and working of hammer mill with neat diagram.

Last Answer : PRINCIPLE: Impact CONSTRUCTION: It consists of a stout metal casing enclosing to which four or more swinging hammer are attached. The lower part of the casing consists of a screen , through which ... are not fixed . The mill can produce coarse to moderately fine powder. DIAGRAM:

Are there any ndt position or etlectrical functional testing?

Description : Are there any ndt position or etlectrical functional testing?

Last Answer : You could try calling an electrician and see what it takes to get aprenticed.

Who should select the specific welds for NDT, to cover the 10% contractual percentage required by the specification/Code? a) Anyone can select the welds as its just a random choice b) The welder as he knows which welds are likely to produce the least defects c) This will be referenced in the inspection and test plan d) Nobody, as welding is always carried out to a high standard the use of percentage NDT is of no real value

Description : Who should select the specific welds for NDT, to cover the 10% contractual percentage required by the specification/Code? a) Anyone can select the welds as its just a random choice b) The welder ... welding is always carried out to a high standard the use of percentage NDT is of no real value

Last Answer : c) This will be referenced in the inspection and test plan

Why is it essential to clean the excess weld metal on completion of the production weld? a) So it can be ready for painting b) To remove any rust c) To ensure it is suitably clean for visual inspection and NDT d) To remove slag from the undercut

Description : Why is it essential to clean the excess weld metal on completion of the production weld? a) So it can be ready for painting b) To remove any rust c) To ensure it is suitably clean for visual inspection and NDT d) To remove slag from the undercut

Last Answer : c) To ensure it is suitably clean for visual inspection and NDT

t is permissible to allow trainee welder to carry out production welding? a) Never b) Yes as long as the supervisor is happy with his workmanship standard c) Yes as long as he has the approved qualification to cover the intended scope of work d) Yes as long as no NDT is required on the finished weld

Description : t is permissible to allow trainee welder to carry out production welding? a) Never b) Yes as long as the supervisor is happy with his workmanship standard c) Yes as long as he has the approved ... cover the intended scope of work d) Yes as long as no NDT is required on the finished weld

Last Answer : a) Never

Who should have access to the WPQR’S? a) NDT operators b) Inspectors only c) Welders only d) Welding Engineer

Description : Who should have access to the WPQR’S? a) NDT operators b) Inspectors only c) Welders only d) Welding Engineer

Last Answer : d) Welding Engineer

factors on which NDT method can be selected.

Description : factors on which NDT method can be selected.

Last Answer : i) Codes or standard requirement ii) Specification of material to be tested, for example, nature of material, its size and shape iii) Type of disorders to be detected, also depend on nature ... is also depending on the equipments available for testing vi) Total cost required to test the material.

Pick up the correct statement from the following: (A) Air lift pumps are generally used for pumping water from deep wells (B) Jet pumps are generally used for pumping water from small wells (C) The hydraulic ram works on the principle of water hammer (D) All the above

Description : Pick up the correct statement from the following: (A) Air lift pumps are generally used for pumping water from deep wells (B) Jet pumps are generally used for pumping water from small wells (C) The hydraulic ram works on the principle of water hammer (D) All the above

Last Answer : (D) All the above

Explain construction and working of Cutter mill or Hammer mill

Description : Explain construction and working of Cutter mill or Hammer mill

Last Answer : CONSTRUCTION: It consists of a hopper at top and metal casing enclosing two sets of knives i.e. stationary knives attached to stator and rotating are attached to rotor. The lower part of the casing consists ... are not fixed. The mill can produce coarse to moderately fine powder DIAGRAM:  

Can blood pressure rebound even higher than it was before medication?

Description : Can blood pressure rebound even higher than it was before medication?

Last Answer : Are you resting sufficiently before taking your BP reading? Are you following all the directions from your doctor on checking your BP?

Why does diet rebound occur?

Description : Why does diet rebound occur?

Last Answer : People return to old eating and exercise (or non-exercise) habits. I gain weight in the winter when I’m not riding my bike and running like I do in fair weather.

Can melatonin cause rebound effects?

Description : Can melatonin cause rebound effects?

Last Answer : I don’t see it having side effects regarding sleep patterns, but perhaps you had better take a look at this site to see the side effects.

Is it a rebound relationship in this scenerio?

Description : Is it a rebound relationship in this scenerio?

Last Answer : It could be either. To answer the question fully, we would have to know all the details. Is she known for breaking up all the time, or is she a really sweet person? It could be either.

A ball is allowed to fall freely from a height of 3 metres on to a fixed plate. If the successive rebound heights are h1, h2, h3 a.5 metres b.4.25 metre c.0.5 metre d.1 metre e.Zero

Description : A ball is allowed to fall freely from a height of 3 metres on to a fixed plate. If the successive rebound heights are h1, h2, h3 a.5 metres b.4.25 metre c.0.5 metre d.1 metre e.Zero

Last Answer : a. 5 metres

What is a rebound question?

Description : What is a rebound question?

Last Answer : I think that it is question that requires an explanation of arebound in it's answer.

Why isostatic rebound slows down over time?

Description : Why isostatic rebound slows down over time?

Last Answer : Feel Free to Answer

How do you know if your ex's rebound relationship will end?

Description : How do you know if your ex's rebound relationship will end?

Last Answer : You don't know. Many people marry the rebound people. Go and discover yourself and find your life away from the ex. There is a reason you aren't together.

A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that – (1) The rubber ball suffers greater change in momentum (2) The metal ball suffers greater change in momentum (3) Both suffer the same change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Description : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that - ... change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Last Answer : (1) The rubber ball suffers greater change in momentum

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness. (A) Scratch (B) Indentation (C) Dynamic (D) Rebound

Description : Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness. (A) Scratch (B) Indentation (C) Dynamic (D) Rebound

Last Answer : (A) Scratch

The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known (A) Porosity (B) Plasticity (C) Permeability (D) Ductility

Description : The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known (A) Porosity (B) Plasticity (C) Permeability (D) Ductility

Last Answer : Answer: Option B

In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed (A) 10 mm (B) 15 mm (C) 20 mm (D) 25 mm

Description : In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net ... load should not exceed (A) 10 mm (B) 15 mm (C) 20 mm (D) 25 mm

Last Answer : Answer: Option D

Which of the following terms is given to hypertension in which the blood pressure, which is controlled with therapy, becomes uncontrolled (abnormally high) with the discontinuation of therapy? a) Rebound Rebound hypertension may precipitate a hypertensive crisis. b) Essential Essential or primary hypertension denotes high blood pressure from an unidentified source. c) Primary Essential or primary hypertension denotes high blood pressure from an unidentified source. d) Secondary Secondary hypertension denotes high blood pressure from an identified cause, such as renal disease.

Description : Which of the following terms is given to hypertension in which the blood pressure, which is controlled with therapy, becomes uncontrolled (abnormally high) with the discontinuation of therapy? ... Secondary hypertension denotes high blood pressure from an identified cause, such as renal disease.

Last Answer : a) Rebound Rebound hypertension may precipitate a hypertensive crisis.

32. A positive sign of appendicitis is localized and rebound tenderness on palpation at which quadrant of the abdomen?

Description : 32. A positive sign of appendicitis is localized and rebound tenderness on palpation at which quadrant of the abdomen?

Last Answer : D. Right lower quadrant

The clips placed at intervals along some leaf spring to prevent spring leaf separation on rebound are (a) rebound clips (b) separation clips (c) interval clips (d)relief clips

Description : The clips placed at intervals along some leaf spring to prevent spring leaf separation on rebound are (a) rebound clips (b) separation clips (c) interval clips (d)relief clips

Last Answer : (a) rebound clips

The weight or pressure required to deflect a spring in mm is called the spring (a) Weight (b) deflection (c) rate (d) rebound

Description : The weight or pressure required to deflect a spring in mm is called the spring (a) Weight (b) deflection (c) rate (d) rebound

Last Answer : c) rate

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*

As an antacid, sodium bicarbonate has the following disadvantages except: A. It causes acid rebound B. In ulcer patients, it increases risk of perforation C. It has low acid neutralizing capacity D. It is contraindicated in hypertensives

Description : As an antacid, sodium bicarbonate has the following disadvantages except: A. It causes acid rebound B. In ulcer patients, it increases risk of perforation C. It has low acid neutralizing capacity D. It is contraindicated in hypertensives

Last Answer : C. It has low acid neutralizing capacity

The following is true of heparin except: A. Sudden stoppage of continuous heparin therapy causes rebound increase in blood coagulability B. High doses of heparin inhibit platelet aggregation C. Heparin is the physiologically active circulating anticoagulant D. Heparin clears lipemic plasma in vivo but not in vitro

Description : The following is true of heparin except: A. Sudden stoppage of continuous heparin therapy causes rebound increase in blood coagulability B. High doses of heparin inhibit platelet aggregation ... active circulating anticoagulant D. Heparin clears lipemic plasma in vivo but not in vitro

Last Answer : C. Heparin is the physiologically active circulating anticoagulant

Methyldopa differs from clonidine in the following respect: A. It is less likely to cause rebound hypertension on sudden discontinuation B. It does not reduce plasma renin activity C. It has a central as well as peripheral site of antihypertensive action D. It does not produce central side effect

Description : Methyldopa differs from clonidine in the following respect: A. It is less likely to cause rebound hypertension on sudden discontinuation B. It does not reduce plasma renin activity C. It has a central as well as peripheral site of antihypertensive action D. It does not produce central side effect

Last Answer : A. It is less likely to cause rebound hypertension on sudden discontinuation

Rebound hypertension on sudden stoppage of medication is most likely to occur with: A. Hydrochlorothiazide B. Prazosin C. Clonidine D. Lisinopri

Description : Rebound hypertension on sudden stoppage of medication is most likely to occur with: A. Hydrochlorothiazide B. Prazosin C. Clonidine D. Lisinopri

Last Answer : C. Clonidine

Which of the following statements is not true of zopiclone: A. It is a nonbenzodiazepine hypnotic with efficacy and safety similar to benzodiazepines B. It does not produce rebound sleep disturbances on discontinuation C. It does not act by potentiating GABA D. It is used to wean off insomniacs from regular benzodiazepine use

Description : Which of the following statements is not true of zopiclone: A. It is a nonbenzodiazepine hypnotic with efficacy and safety similar to benzodiazepines B. It does not produce rebound sleep disturbances ... act by potentiating GABA D. It is used to wean off insomniacs from regular benzodiazepine use

Last Answer : C. It does not act by potentiating GABA

After chronic systemic therapy, withdrawal of corticosteroids should be gradual because: A. Corticosteroids produce psychological dependence B. Abrupt withdrawal may reactivate the underlying disease C. Abrupt withdrawal produces rebound hypertension D. All of the above are correct

Description : After chronic systemic therapy, withdrawal of corticosteroids should be gradual because: A. Corticosteroids produce psychological dependence B. Abrupt withdrawal may reactivate the underlying disease C. Abrupt withdrawal produces rebound hypertension D. All of the above are correct

Last Answer : B. Abrupt withdrawal may reactivate the underlying disea

Which of the following reaction is called Augmented adverse drug reactions? a) Genetically determined effects. b) Idiosyncracy. c) Rebound effect on discontinuation d) Allergic reactions & anaphylaxis.

Description : Which of the following reaction is called Augmented adverse drug reactions? a) Genetically determined effects. b) Idiosyncracy. c) Rebound effect on discontinuation d) Allergic reactions & anaphylaxis.

Last Answer : c) Rebound effect on discontinuation 

A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that (1) The rubber ball suffers greater change in momentum (2) The metal ball suffers greater change in momentum (3) Both suffer the same change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Description : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that ( ... change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Last Answer : The rubber ball suffers greater change in momentum 

Arrange the given words in the sequence in which they occur in the dictionary. 1. Reality 2. Receptive 3. Rebound 4. Realism 5. Realize Options: 1) 45132 2) 41532 3) 41523 4) 45123

Description : Arrange the given words in the sequence in which they occur in the dictionary.  1. Reality 2. Receptive 3. Rebound 4. Realism 5. Realize  Options: 1) 45132 2) 41532 3) 41523 4) 45123 

Last Answer : Correct Answer: 41532  

There are fundamental principles that the professional accountant has to observe when performing assurance engagements. The requirement of which principle is of particular importance in an assurance engagement in ensuring that the conclusion of the professional accountant has value to the intended user? a. Integrity b. Confidentiality c. Professional competence d. Objectivity

Description : There are fundamental principles that the professional accountant has to observe when performing assurance engagements. The requirement of which principle is of particular importance in an assurance ... the intended user? a. Integrity b. Confidentiality c. Professional competence d. Objectivity

Last Answer : Objectivity

Explain water hammer phenomenon and state the remedies measures to avoid it.

Description : Explain water hammer phenomenon and state the remedies measures to avoid it.

Last Answer : Water hammer phenomenon: commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe. Water hammer (or hydraulic shock) is the momentary increase in ... . caused by the moving water. 7) Use high strength pipes. 8) Close the valve slowly.

State the causes and remedial measures of water hammer in pipes.

Description : State the causes and remedial measures of water hammer in pipes.

Last Answer : Causes of water hammer: i. A water hammer commonly occurs when fluid flowing with high velocity in the pipe is brought to rest with a valve closes suddenly at an end of a pipeline system. ii. A ... are opened gradually. v. Air chambers are provided on the upstream of valves on long pipe lines. 

State the importance of submission drawing and working drawing in civil engineering works.

Description : State the importance of submission drawing and working drawing in civil engineering works.

Last Answer : Purposes of submission drawing - 1) To get sanction from competent authority before starting actual work. 2) To check whether the proposed construction is as per bye-laws or not. 3) To decide the ... carry out the work as per design. 6) To check the work carried out and record measurements. 

What is the ambient temperature in hammer-space?

Description : What is the ambient temperature in hammer-space?

Last Answer : The temperature of hammerspace is around 294 degrees Kelvin. This temperature is maintained by the transdimensional fold or warp energy produced when objects are brought into or taken out of hammerspace. To ... to the second law of thermodynamics, is manifested as heat. Doesn't everyone know that?

This is the most important question ever asked in the history of humanity. Could Son Goku lift up Thor's hammer?

Description : This is the most important question ever asked in the history of humanity. Could Son Goku lift up Thor's hammer?

Last Answer : I despair for humanity if this is the most important question confronting it. All is lost!

How long does discoloration last from having bashed my nail with a hammer?

Description : How long does discoloration last from having bashed my nail with a hammer?

Last Answer : That's not all that long for it to last and it's small so I wouldn't worry about it too much. I've done it so the entire nail turns black and eventually falls off. That's usually quicker, about two to ... out, but it doesn't sound that bad that you need to do that. And don't try it on your own.

Could BP's closing off the well create a hydraulic hammer?

Description : Could BP's closing off the well create a hydraulic hammer?

Last Answer : answer:That is why they closed the valves off gradually, to allow the pressure to build up slowly. Also - this is not entirely hydraulic. There is a considerable amount of methane in the flow, which ... Potentially, you have more of a blowout risk from the gas pressure than you do from the oil.

What can you fix with a hammer and duct tape?

Description : What can you fix with a hammer and duct tape?

Last Answer : Everything. Might not work or last. But you can “fix” it.

Hammer flipping mystery (see details)

Description : Hammer flipping mystery (see details)

Last Answer : answer:well i believe that it is simply that the differences in mass cause a torque about the handle, causing it to spin, but it may not be as simple as that. i also like the tags for this question :)

To kill a fly with a hammer: a language question.

Description : To kill a fly with a hammer: a language question.

Last Answer : answer:I’m not fully understanding what you’re asking here. There’s a clear escalation in the four possible endings you suggested. But what about it is supposed to trouble me? If I thought you were going to eat the cookie and you said I was on crack? I could use a cookie…