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Basic Machining 1
Quiz by ruben medroso
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25 questions
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- Q1Which of the following are potential safety hazards when operating a lathe?all of the aboveStopping the machine using the emergency stop and wearing barrier creamWearing PPE and applying safety standardRemoving long stringy chips with bare hands and guards when turning to view the operation30s
- Q2Which�two�of the following are good working practices?Leaving the machine while it is running and wearing gloves while machining.Wearing loose sleeved overall and leaving waste bins in gangway.Tools and equipment should be clean and returned to designated place and documentation must be returned for safe keepingStoring oily rags in overall pockets and Removal of metal chips from lathe tray with bare hands.30s
- Q3Which of the following can be used to protect a finished diameter when using a work carrier while turning between center?Brass and tin sheetCloth and paperAll of the aboveSand paper and cardboard30s
- Q4What are the effects of clamping the workpiece in a chuck or work holding device?To crush or damage the workTo enable the work to rotate at high speedsTo be able to leave the machine running unattendedTo be held securely while revolving at the same time as being cut30s
- Q5Over tightening the workpiece in the chuck hard jaws can cause?Good surface finishThe ability to run at higher speedsAccurate dimensionsIndentations or distortion to the work piece30s
- Q6Backlash in machine slides and screws is a result of ?Not using coolantUsing the wrong spindle speedsSelecting the wrong feedrateThe wear between a lead screw and drive nut30s
- Q7How can backlash be overcome?By increasing the feed rateBy reducing the depth of cutBy applying the turning pressure in one direction onlyBy taking more trial cuts30s
- Q8A trial cut was taken on a lathe. The readings on the workpiece are 2.240" at the headstock end and 2.220" at the tailstock end. To align the center which way must the tailstock must be adjusted?0.010 inches toward the operator0.005 inches toward the operator0.020 inches away from the operator0.010 inches away from the operator30s
- Q9When taking roughing cuts, what is the effect on tool life?High pressure and temperatures are put on the cutter causing the cutting edge to break downLow pressure and minimal heat generation is put on the cutter giving good surface finishThe tool leaves a better surface finish and has minimal tool wearAll of the above30s
- Q10What is the name given to the type of tool that would be used for general turning and facing?Chamfer toolRight hand knife edge toolUndercut toolForming tool30s
- Q11Which of the following statements best describes a root cause for excessive tool wear when machining a hard material?The cutting tool is defective and must be replacedThe feed is set slightly below the recommended feed rateThe depth of cut is too shallow and must be increasedThe RPM is set too high30s
- Q12How is feed rate designated on a lathe?Inches per minuteInches per revolutionFeet per secondFeet per revolution30s
- Q13What is the term used for the type of material that does not require cutting fluid to be used?AbrasiveLow carbonHigh tensileSelf lubricating30s
- Q14Which of these are most common signs of tool wear and imminent failure?Clean edge and no smokeChips are uniform in colour and sizeA high quality surface finishA burning smell, metal chips becomes blue and vibrating hand wheel30s
- Q15A small pip was left on the end of a workpiece during a facing operation. The root cause for this is:The tool is set on centre heightThe tool is set below center heightThe tool is incorrectly groundThe end relief of the tool is too large30s