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New Interview Questions

 Category :: TaxationPosted By : saiprasad 
  :Q:  What is the difference between Road permit and Way bill ?
 Category :: SAP FI COPosted By : srikanth86 
  :Q:  dear fico expert's..in asset accounting..i completed all configuration steps..and purchased asset also..with tc.f-90..problem here depreciation run with(AFAB..it isnot successful..spool is not showing any depreciated value's..i want sale asset and go for further posting..please help.
 Category :: SAP FI COPosted By : srikanth86 
  :Q:  hello sap guru's...while creating outbound delivery VL01n i getting a error..msg no VL461,VL248..i saw solution step's in sap.scn.com....even i could not proceed this outbound delivery..plz give a detailed explanation to solve error..thanking u senior's...junior
 Category :: SAP FI COPosted By : srikanth86 
  :Q:  down payments..by using t-code -48 i have posted a dp..amt of 160000.while invoice was fully posted..but i cleared it t-code 58 instead of f-44..in fbln1 in still shows open item..give a solution..tq
 Category :: Accounting GeneralPosted By : mrunmayee 
  :Q:  How to Automate requirment mapping in QC?
 Category :: Civil EngineeringPosted By : monty 
  :Q:  material requred for 1 square foot lanter with formula
 Category :: Electrical EngineeringPosted By : sreesaiser 
  :Q:  what will happen if frequency is below 50 hz?
 Category :: Electrical EngineeringPosted By : sreesaiser 
  :Q:  why current is constant on d.c?
 Category :: Electrical EngineeringPosted By : laxmi narayan ojha 
  :Q:  in a solar power plant,we are going to step up the voltage 350V to 33kv, and to 132kv GSS. i want to ask that if it is possible that 315v/33kv is not possible because we also use 315v/11kv. or it should be 415v/33kv? is it effects generation or losses?  the second question is-generation is depends on LV winding? or LV winding design for generation voltage?
 Category :: TeradataPosted By : priyabrat 
  :Q:  Why do Hash joins usually perform better than Merge Joins?
 Category :: GATEPosted By : pradeep 
  :Q:  Howto calculate OLR range for a motor 
 Category :: Civil EngineeringPosted By : irf 
  :Q:  What do you mean by the word 'shear'?
 Category :: Call Centre AllOtherPosted By : majar alam 
  :Q:  Can anybody come up with an example that how SLA and AHT is calculated ?
 Category :: TIBCOPosted By : subha 
  :Q:  What is the end point of concrete wsdl???
 Category :: Accounting AllOtherPosted By : alhex 
  :Q:  what is aspects of taxation?

New Answers

 Category :: SQL PLSQL Posted By : kishor dange 
 :Q:  how to find the second highest salary from emp table?
A :: select max(sal) from table_name where sal<(select max(sal) from table_name)
 Category :: SQL PLSQL Posted By : dakshin 
 :Q:  how to find the second highest salary from emp table?
A :: select * from (select a.*,dense_rank() over (order by sal) rnk from emp a order by sal) where rnk =2
 Category :: USA Student Visa F1 Visa Posted By : srujal 
 :Q:  Why have you chosen this university?
A :: Because this uni is offered me same academic plan which match my study plan.Moreover the professors are highly qualify and well experience so i can get best knowledge from them. my uni is providing 24 hrs library and internet facility.even more I searched the reviews about my uni over the internet and i found all the reviews in positive attitude. my uni campus is safe for me.course contents are advanced and updated more emphases on practical approach... 
 Category :: Electrical Engineering Posted By : dhiraj banka 
 :Q:  WHAT IS B & C CLASS SURGE PROTECTION AND WHAT IS DIFFERENCE BETWEEN B & c CLASS SP
A :: Class b SPD is for lightning surges & class c SPD is for switching surges.Class B+C protects both from lightning & switching surges.
 Category :: QTP Posted By : raghav... 
 :Q:  is the institute MindQ laid by Mr.Nageswar rao.. heard alot about Nageswar rao...can you briefly let me know about the Nageswar rao inst. and MinQ...THANX IN ADVANCE
A :: "Nageshwar rao",it's brand name for testing.....
 Category :: Electrical Engineering Posted By : ll.krishna rao 
 :Q:  Rated moter voltage and frequency is 380volt 60 hz but moter is running at 380votac 50hz is this harmful for moter winding
A :: V=4.44fNBA Therefore V is proportional to frequency if you want not to exceed the design parameter of flux density.If you operate a motor at 50Hz instead of its rated 60 Hz,then you will be exceeding the flux density by 120% for 380 v operation.I suggest you to operate the motor at 380/1.2 volts instead at the expense of full power.
 Category :: SQL PLSQL Posted By : mahalakshmi s 
 :Q:  i have a table eno dno sal 1 10 200 2 10 150 3 10 100 4 20 75 5 20 100 i want to get sal which is less than the avg sal of thri dept. eno dno sal 2 10 150 3 10 100 4 20 75
A :: select * from (select id,(case when sal < avg(sal) over(partition by id)  then sal else 0 end) avg_val from dept) a where avg_val !=0;
 Category :: Analytical Chemistry Posted By : k.lavanya 
 :Q:  What is the difference between uplc and hplc
A :: HPLC is high performance liquid chromatography, whereas UPLC is ultra high performance liquid chromatography In essence, UPLC is just a special variant of HPLC The pump pressure, which is 40Mpa (400 atmospheres) in HPLC, can go up to 100MPa in UPLC. UPLC also allows for much smaller particle size, normally less than 2um whereas it is normally 5um in HPLC.
 Category :: Electrical Engineering Posted By : paul jeffery 
 :Q:  single phase 230v three phase voltage 415volt why we aren't used line voltage 690v?
A :: Some countries (E,G. Sweden) and processes (E.G. Paper pulp) do use 690 V line to line systems (400 V line to neutral)and transform to 690 v from 11 kv. Wind farms often generate at 690 v and step up to 11 kv to synchronise with the grid. 690 v reduces cable sizes and cost vs 400-440 v systems and enables much larger motors to be DOL started - up to 600 kw plus compared to 200 kw plus for 400 v units. A 400 delta connected motor will operate at 690 v when star connected. These are the basics but 690 v has many advantages over 400 v.
 Category :: Mechanical Engineering Posted By : deva 
 :Q:  welding defects
A :: Major causes According to the American Society of Mechanical Engineers (ASME), welding defect causes are broken down as follows: 45 percent poor process conditions, 32 percent operator error, 12 percent wrong technique, 10 percent incorrect consumables, and 5 percent bad weld grooves.[4] Hydrogen embrittlement Main article: Hydrogen embrittlement Residual stresses Main article: Residual stress The magnitude of stress that can be formed from welding can be roughly calculated using:[5] E alpha Delta T Where E is Young's modulus, α is the coefficient of thermal expansion, and ΔT is the temperature change. For steel this calculates out to be approximately 3.5 GPa (510,000 psi). Types Cracks Welding cracks.svg Defects related to fracture. Arc strike cracking Arc strike cracking occurs when the arc is struck but the spot is not welded. This occurs because the spot is heated above the material's upper critical temperature and then essentially quenched. This forms martensite, which is brittle and micro-cracks. Usually the arc is struck in the weld groove so this type of crack does not occur, but if the arc is struck outside of the weld groove then it must be welded over to prevent the cracking. If this is not an option then the arc spot can be postheated, that is, the area is heated with an oxy-acetylene torch, and then allowed to cool slowly.[6] Cold cracking Residual stresses can reduce the strength of the base material, and can lead to catastrophic failure through cold cracking, as was the case with several of the World War II Liberty ships' hulls. Cold cracking is limited to steels and is associated with the formation of martensite as the weld cools. The cracking occurs in the heat-affected zone of the base material. To reduce the amount of distortion and residual stresses, the amount of heat input should be limited, and the welding sequence used should not be from one end directly to the other, but rather in segments.[7] Cold cracking only occurs when all the following preconditions are met:[citation needed] susceptible microstructure (e.g. martensite) hydrogen present in the microstructure (hydrogen embrittlement) service temperature environment (normal atmospheric pressure): -100 to +100 °F high restraint Eliminating any one of these will eliminate this condition. Crater crack Crater cracks occur when a crater is not filled before the arc is broken. This causes the outer edges of the crater to cool more quickly than the crater, which creates sufficient stresses to form a crack. Longitudinal, transverse and/or multiple radial cracks may form.[8] Fusion-line cracks The following is an excerpt from a research on Damage Behavior of Welded Joints with Defects on Fusion Line Two kinds of welded joints damage models,with notch and crack on fusion line,were applied to analyse the influences of the mechanical property heterogeneity and geometric heterogeneity such as intensity matching, base metal rupture strain,base metal strain-hardening exponential and welding line width on the damage distribution and the relationship between damage parameter and rupture paremater. In addition, in the presence of entire damage zone method, the crack extension behaviors of the welded joints were investigated. Base metal mechanical property has great effects on the damage distribution of the welded joints. On condition of similar load,the welded joints damage value increases with the decreasing base metal rupture strain and the increasing base metal strain-hardening exponential and intensity matching. For under-matched welded joints,the damage concentration zone of the welded joints near the notch will transfer from the welded metal side to the base metal side as the base metal rupture strain decreases and strain-hardening exponential increases. but for over-matched welded joints, the damage concentration zone will transfer from the base metal side to the welded metal side as the base metal rupture strain increases and strain-hardening exponential decreases. On the other hand, the varied welded line width has little effect on the damage distribution of the welded joints.For the welded joints with crack on fusion line,when loaded and when the crack mouth opening distance reaches the same level,the maximum damage value in front of the crack increases as the base metal strain-hardening exponential and intensity matching increase,but decreases as the base metal rupture strain increases. The establishment of the failure principle on the welded structure should take mechanical property heterogeneity into serious consideration. The numerical calculations of the crack extension behavior which is based on the entire damage zone viewpoint reveal that the crack extension path is parallel to the fusion line on condition of plane stress but on condition of plane strain the angle between the crack extension path and the fusion line is approximate 45°.The numerical calculations and analysis indicate that micro-damage parameter and macro -rupture parameter both can describe the stress-strain behaviors,and their relationship intensively relies on mechanical property heterogeneity. The investigation on the micro-damage parameter and macro -rupture parameter is undoubtedly supplement to the safety evaluation and life-span prediction of the welded joints,which is of great theory significance. Hat crack Hat crack.svg Hat cracks get their name from the shape of the cross-section of the weld, because the weld flares out at the face of the weld. The crack starts at the fusion line and extends up through the weld. They are usually caused by too much voltage or not enough speed.[8] Hot cracking Hot cracking, also known as solidification cracking, can occur with all metals, and happens in the fusion zone of a weld. To diminish the probability of this type of cracking, excess material restraint should be avoided, and a proper filler material should be utilized.[7] Other causes include too high welding current, poor joint design that does not diffuse heat, impurities (such as sulfur and phosphorus), preheating, speed is too fast, and long arcs.[9] Underbead crack An undercut crack, also known as a heat-affected zone (HAZ) crack,[10] is a crack that forms a short distance away from the fusion line; it occurs in low alloy and high alloy steel. The exact causes of this type of crack are not completely understood, but it is known that dissolved hydrogen must be present. The other factor that affects this type of crack is internal stresses resulting from: unequal contraction between the base metal and the weld metal, restraint of the base metal, stresses from the formation of martensite, and stresses from the precipitation of hydrogen out of the metal.[11] Longitudinal crack Longitudinal cracks run along the length of a weld bead. There are three types: check cracks, root cracks, and full centerline cracks. Check cracks are visible from the surface and extend partially into weld. They are usually caused by high shrinkage stresses, especially on final passes, or by a hot cracking mechanism. Root cracks start at the root and extent part way into the weld. They are the most common type of longitudinal crack because of the small size of the first weld bead. If this type of crack is not addressed then it will usually propagate into subsequent weld passes, which is how full cracks (a crack from the root to the surface) usually form.[8] Reheat cracking Reheat cracking is a type of cracking that occurs in HSLA steels, particularly chromium, molybdenum and vanadium steels, during postheating. The phenomenon has also been observed in austenitic stainless steels. It is caused by the poor creep ductility of the heat affected zone. Any existing defects or notches aggravate crack formation. Things that help prevent reheat cracking include heat treating first with a low temperature soak and then with a rapid heating to high temperatures, grinding or peening the weld toes, and using a two layer welding technique to refine the HAZ grain structure.[12][13] Root and toe cracks A root crack is the crack formed by the short bead at the root(of edge preparation) beginning of the welding, low current at the beginning and due to improper filler material used for welding.Major reason for happening of these types of cracks is hydrogen embrittlement. These types of defects can be eliminated using high current at the starting and proper filler material. Toe crack occurs due to moisture content present in the welded area,it as a part of the surface crack so can be easily detected. Preheating and proper joint formation is must for eliminating these types of defects. Wiki letter w.svg This section is empty. You can help by adding to it. (December 2009) Transverse crack A gap or break in the surface of a weld perpendicular to the weld axis that may be completely within the weld metal or may extend from the weld metal into the base metal. Excess hydrogen, an excessively strong weld metal, and high levels of residual stress result in transverse cracks. Distortion Welding methods that involve the melting of metal at the site of the joint necessarily are prone to shrinkage as the heated metal cools. Shrinkage then introduces residual stresses and distortion. Distortion can pose a major problem, since the final product is not the desired shape. To alleviate certain types of distortion the workpieces can be offset so that after welding the product is the correct shape.[14] The following pictures describe various types of welding distortion:[15] Transverse shrinkage Angular distortion Longitudinal shrinkage Fillet distortion Neutral axis distortion Gas inclusion Gas inclusions is a wide variety of defects that includes porosity, blow holes, and pipes (or wormholes). The underlying cause for gas inclusions is the entrapment of gas within the solidified weld. Gas formation can be from any of the following causes: high sulphur content in the workpiece or electrode, excessive moisture from the electrode or workpiece, too short of an arc, or wrong welding current or polarity.[10] Inclusions There are two types of inclusions: linear inclusions and rounded inclusions. Inclusions can be either isolated or cumulative. Linear inclusions occur when there is slag or flux in the weld. Slag forms from the use of a flux, which is why this type of defect usually occurs in welding processes that use flux, such as shielded metal arc welding, flux-cored arc welding, and submerged arc welding, but it can also occur in gas metal arc welding. This defect usually occurs in welds that require multiple passes and there is poor overlap between the welds. The poor overlap does not allow the slag from the previous weld to melt out and rise to the top of the new weld bead. It can also occur if the previous weld left an undercut or an uneven surface profile. To prevent slag inclusions the slag should be cleaned from the weld bead between passes via grinding, wire brushing, or chipping.[16] Isolated inclusions occur when rust or mill scale is present on the base metal.[17] Lack of fusion and incomplete penetration Lack of fusion is the poor adhesion of the weld bead to the base metal; incomplete penetration is a weld bead that does not start at the root of the weld groove. Incomplete penetration forms channels and crevices in the root of the weld which can cause serious issues in pipes because corrosive substances can settle in these areas. These types of defects occur when the welding procedures are not adhered to; possible causes include the current setting, arc length, electrode angle, and electrode manipulation.[18] Defects can be varied and classified as critical or non critical. Porosity (bubbles) in the weld are usually acceptable to a certain degree. Slag inclusions, undercut, and cracks are usually non acceptable. Some porosity, cracks, and slag inclusions are visible and may not need further inspection to require their removal. Small defects such as these can be verified by Liquid Penetrant Testing (Dye check). Slag inclusions and cracks just below the surface can be discovered by Magnetic Particle Inspection. Deeper defects can be detected using the Radiographic (X-rays) and/or Ultrasound (sound waves) testing techniques. Lamellar tearing Lamellar tearing is a type of welding defect that occurs in rolled steel plates that have been welded together due to shrinkage forces perpendicular to the faces of the plates.[19] Since the 1970s, changes in manufacturing practices limiting the amount of sulfur used have greatly reduced the incidence of this problem.[20] Lamellar tearing is caused mainly by sulfurous inclusions in the material. Other causes include an excess of hydrogen in the alloy. This defect can be mitigated by keeping the amount of sulfur in the steel alloy below 0.005%.[20] Adding rare earth elements, zirconium, or calcium to the to control the configuration of sulfur inclusions throughout the metal lattice can also mitigate the problem.[21] Modifying the construction process to use casted or forged parts in place of welded parts can eliminate this problem, as Lamellar tearing only occurs in welded parts.[19] Undercut Welding undercut.svg Undercutting is when the weld reduces the cross-sectional thickness of the base metal, which reduces the strength of the weld and workpieces. One reason for this type of defect is excessive current, causing the edges of the joint to melt and drain into the weld; this leaves a drain-like impression along the length of the weld. Another reason is if a poor technique is used that does not deposit enough filler metal along the edges of the weld. A third reason is using an incorrect filler metal, because it will create greater temperature gradients between the center of the weld and the edges. Other causes include too small of an electrode angle, a dampened electrode, excessive arc length, and slow speed.[22]



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