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Hello, I have a question regarding usage of defective instruments in production line. If an operator of assembly area is using lets say a defective Vernier caliper. The caliper has an error of 0,1mm so it can not be used by machining department, but the assembly department has acceptable error...

Hello, I have a question regarding surface coating inspection. I have implemented controls in my process for wet film inspection, DFT inspection, surface adherence inspection using SSPC standards. But there is one argument which is embossed painting, as shown in the photo. How can one create...

Hello, I have a question about the physical appearance of carbon steel after it is hardened with inudction hardening vs carburising. The steel grade is C45. The reason for question is we have parts with indication of induction hardening to 52 HRC on design. I control it with a portable...

Hello everyone, We have to overhaul an old machine, its a marine loading arm manufactured in 1980. On top of column there is mounted a big bearing with 3 ball races. The ball races show flase brinneling marks. The bearing is manufactured in such a way that there are 3 semicicular tracks...

Dear all, Is there any ASQ CQA here, or has anyone experience of this exam? I want to go for it. I did a sample exam and I was able to solve 60% without preperation, so a month of preperation will be enough for me to be ready for exam. I have MSc Desgree in Mechanical Engineering and 8...

Hello everyone, I have recently joined a company as quality manager. We have to perfrom a renewal of our quality certification ISO 9001. This is my first time to face an audit. I was studying some books by ASQ and following some courses to prepare for the audit. The company also has a...

Hello everyone, Is it possible that a bearing rotates 90 degrees anticlockwise, and then when rotated back 90° clockwise it does without any problem. But when it is rotated further in the clockwise direction by 10° it resists the motion as if it has some mechanical defect inside? If there is...

Hello everyone, Is there any standard which establishes the minimim thickness of chromium plating on the steel rods of hydraulic cylinder? We are making a machine to be installed on sea side with supposed life of 25 years. The hydraulic cylinder rods commercially available are with 20 microns...

Hello everyone, Is there any standard which establishes the minimim thickness of chromium plating on the steel rods of hydraulic cylinder? We are making a machine to be installed on sea side with supposed life of 25 years. The hydraulic cylinder rods commercially available are with 20 microns...

Hello everyone, I have a very basic question about gear train design. In this design, it can be seen that there is a set of 3 gears with same ratio, which are being used to move the bigger gear. I want to usa only one gear instead of three to move the bigger gear. But I have been told that...

Hello everyone, I am revising the quality manual of my company. The older quality manual has the boxes on front page to select: . Controlled copy . Uncontrolled copy If controlled copy is sent to a client, then it has to be kept in records, and in case of update of Quality Manual, that client...

Hello, I have a very basic question. We work with a lot of sheet metal, most of it is austenietic stainless steel. Our operator at the cutting machine unrolls a nudle of sheet but after he has cut the amount of material required, he rolls the sheet back and used metalic strips to hold the roll...

Hello everyone, What are the defects that you see in the attached image of a fillet weld? I have checked using a Bridge-cam guage, the undercuts ≤ 1mm. The throat length is acceptable according to AWS D1.1. The weld is of unequal legs. According to AWS D1.1 I dont find anything wrong in this...

Hello everyone, Imagine an L type configuration of tubes, thereis a column of 7m height with 12 inch bore connected to a horizontal line through an elbow, the bore is the same, the horizontal line is then 10m long. At the junction of column and horizntal pipe, the elblow is performing the conne...

Hello, According to API RP 582, the ferrite test should be performed prior to PWHT. But, I was reading a research article where it was shown that a large percentage of delta ferrite desolves during PWHT (in the research findings it went down from 8% to 1.2%) if the PWHT temperature range is 950...

Hello everyone, In the multi-pass welding process (1st layer FCAW, 2-6 layers SAW), if the 1st layer is made using FCAW, and in this layer there are 2 or 3 holes of 3mm diameter. Should these holes be repaired before performing the 2nd pass which will be with SAW? Or the subsequent layers will...

Hello, I need help to understand how to select a hydraulic motor to move a structure. Imagine a hinged beam with two concentrated loads on ends. The hinge is not in the center. The gravity is in negative Y direction. And the beam is stable in the XY plane, so the loads and moments are balanced...

Hello, Can anyone provide me a table for Poldi hardness test? I have recently bought the instrument, it came with a table but the table is for cast iron. I need table for Austenitic stainless steels.

Hello, I was wondering if anyone has experience of how to check the thickness of a silicawool gasket. It is also called fiberglass gasket. We have ordered a yarn of 3mmthickness, when I try to measure it with calliper I find it 1.5mm, but since it is a very soft material I suspect that the jaws...

Hello, I have a seemingly dumb question. Does anyone know if the formulas given in the UHA 44 to calculate % strain give values in % or should be multplied with 100 to get the percentage? e.g If I have a 5mm thick plate with 420mm span, and I want to find the strain. Using formula for...