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Monday, 2 March 2015

Measuring Instruments - Fill in the Blanks

Measuring Instruments - Fill in the Blanks Points : measuring instruments, mechanical engineering, metrology, mechanical technology, mcqs, evaluation, judgment, gauging, rating, consideration, analysis, examination, workup, test, review, objective type question and answer, fill in the blanks
  1. The squaring head also contain a spirit level on combination set which is used to test the surfaces for Parallelism.
  2. Metal retractable Tap measure are relatively easy to use.
  3. On metric micrometers the graduations on the sleeve and thimble are usually 0.5mm and 0.01. respectively.
  4. Folding steel rule has two or more graduated lengths of steel connected together by Swivel joints.
  5. Larger versions of micrometers called Super Micrometer are capable of measuring 0.00 1 inch, when equipped with an indicator.
  6. For the measurement work of the highest precision, small circular surface plates, commonly known as Tool Markers Flats.
  7. In the “V”-block method of measuring of circulatory (lobbing) the V-block is placed on a Surface Plate and the work to be checked is placed upon it.
  8. Micrometer should be cleaned of any dust and spindle should move Freely.
  9. Spirit levels are used for measuring small Angle or inclinations.
  10. After work the plate is cleaned and oiled to prevent corrosion and covered with a wooden Shield.
  11. If a circle is divided into 360 perts, each part is called a Degree (°).
  12. The principle of Common datum should, be employed while using a scale or rule.
  13. Caliper is an instrument used for measuring distances between or over surfaces.
  14. Differential micrometer is used to increase the accuracy of micrometers.
  15. Each Minutes is further subdivided into 60 parts called second.
  16. A vernier depth gauge is used to measure the depth of holes, recesses and Distances from a plane surface to a projection.
  17. The micrometer are available in various size and Ranges.
  18. The scale is a Line measuring device.
  19. The part whose dimension is to be measured must be held in Left Hand and the micrometer in Right Hand.
  20. The machinists level consists of a body with a flat bases surface and the Glass Tube mounted in the upper part of the body.
  21. An engineer’s steel rule is also known as “scale” and is a line Engineering device.
  22. After use the rule should be wiped clean and lightly oiled to prevent Rusting.
  23. In combination set a Scribing Point is also inserted into the rear of the base for scribing purposes.
  24. With ordinary scale, one leg of inside caliper must be coincided with a vertical brace and second leg Adjusted accordingly.
  25. The calipers reading is transferred to the scale by holding one leg of the caliper against the scale firmly and the Reading taken at the other end leg.
  26. Measuring Tip is a ribbon of cloth, plastic or metal with linear measure.
  27. Many errors have resulted from the ordinary micrometer being misread, the errors being 10.025 inch or 0.5.
  28. The surface plates are tested for Flatness by means of an accurate straight edge.
  29. The surface plate is made of good quality close-gained gray iron casting or Granite with stiffening ribs.
  30. Most tap measure have a Clip (Tang) that can be attached to a fixed object to measure spans easily.
  31. Combination is the most adaptable and commonly used Non Precision instruments to be used in lay out and inspection work.
  32. Many steel blade have tension control brakes that lock the blade in place for measuring Spans.
  33. A Tap measure of 25 or even 1000 feet can wind into a relatively small container.
  34. The surface plate top is set strictly horizontal with the help of a Level.
  35. Depth micrometer is also known as micrometer Depth Gauge.
  36. The vernier instruments generally used in Work Shop and engineering metrology.
  37. Cast iron angle plates are widely used for work shop and Inspection purposes.
  38. Steel rules called Hook Rules can be purchased, the little bars or hooks on the end.
  39. The vernier instruments generally used in workshop and engineering metrology have comparatively Low accuracy.
  40. The vernier Depth gauge is used to measure the depth of holes, recesses and distances from a plane surface to a projection.
  41. Internal micrometers are used for measuring internal dimensions.
  42. The verinier Height gauge is mainly used in the inspection of parts an lay out work.
  43. Each degree is further divided into sicty parts called Minutes.
  44. Micrometers are designed on the principle of Screw and Nut.
  45. The engineer’s steel rule is also known as Scale.

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