MDSP ME Board Exam January 2011 PDF

Preview

Summary

Republic of the Philippines PROFESSIONAL REGULATION COMMISSION ManilaBOARD OF MECHANICAL ENGINEERINGRegistered Mechanical Engineer Licensure Examination Saturday January 29, 2011 01:30 p. – 06:30 p. MACHINE DESIGN, MATERIALS AND SHOP PRACTICE SET AINSTRUCTION: Select the correct answer for each of t...

Description

Republic of the Philippines PROFESSIONAL REGULATION COMMISSION Manila BOARD OF MECHANICAL ENGINEERING Registered Mechanical Engineer Licensure Examination Saturday January 29, 2011 01:30 p.m. – 06:30 p.m. ---------------------------------------------------------------MACHINE DESIGN, MATERIALS AND SHOP PRACTICE SET A INSTRUCTION: Select the correct answer for each of the following questions. Mark only one answer for each item by marking the box corresponding to the letter of your choice on the answer sheet provided. STRICTLY NO ERASURES ALLOWED. Use pencil No.2 only. MULTIPLE CHOICE 1. A thin hollow sphere of radius 10 in and thickness 0.1 in is subjected to an internal pressure of 100 psig. The maximum normal stress on an element of the sphere is A. 2500 psi C. 7,070 psi B. 5000 psi * D. 10,000 psi 2. In designing a cylindrical pressure tank 3 feet in diameter, a factor of safety of 2.5 is used. The cylinder is made of steel (yield stress = 30 ksi) and will contain pressures up to1000 psi. What is the required wall thickness, t, based on circumferential stress considerations? A. 0.75 in. C. 3 in. B. 1.50 in. * D. 3.75 in. 3. A flywheel weighing 6 kN has a mean diameter of 90 cm. The maximum speed of the flywheel is 7 rev/sec slowed down to 4 rev/sec during the shearing process. Determine the energy released by the flywheel. A. 7856 kg-m C. 9872 kg-m B. 8145 kg-m D. 8241 kg-m * 4.

When measuring a drill for A. margins * B. flutes

size measure across the: C. shank D. point

5.

The tool used in precision work to smooth or enlarge holes is called a: A. round out C. reamer * B. drift pin D. protractor

6. Which of the following chisels would be used for cutting oil grooves? A. diamond-point chisel C. round-nose chisel * B. cold chisel D. hot chisel 7.

Which of the following is not a cut of file? A. smooth C. half-round * B. second cut D. bastard

8.

Which of the following is the smallest size drill? A. # 80 * C. # 1

B. # 60

D. # 0

9. Two parallel shaft connected by pure rolling turn in the same direction and having a speed ratio of 4. What is the distance of the two shaft if the small cylinder is 8 cm? A. 10 cm C. 18 cm B. 12 cm * D. 20 cm 10. What modulus of elasticity in tension is required to obtain a unit deformation of 0.00107 m/m from a load producing a unit tensile stress of 50, 000 psi? A. 34.5 x 106 psi C. 46.7 x 106 psi * 5 B. 46.7 x 10 psi D. 4.67 x 106 psi 11. Determine the bursting steam pressure of a steel plate with a diameter of 12 in.a and made of ¼ in steel plate. The joint efficiency is at 75% and the tensile strength is 55 ksi. A. 3, 440 psi * C. 3, 430 psi B. 3, 437 psi D. 3, 427 psi 12. What is the working strength of a 2 in bolt which is screwed up tightly in a packed joint when the allowable working stress is 11,000 psi? A. 12,400 lb C. 18,700 lb * B. 15,500 lb D. 22,500 lb 13. Which of the following is the largest size drill? A. A C. Z * B. X D. XX 14. The size of a drill is stamped on the: A. point C. margin B. shank * D. flute 15. Which of the following safety precautions should be followed when pouring babbitt? A. operator must wear goggles B. the surface to be babbitted must be free of moisture C. the surface to be babbitted must be clean D. all of the above * 16. Which of the following safety precautions should be followed when renewing a flange gasket? A. drain the line thoroughly B. tie down isolation valves C. isolate the section to be worked on D. all of the above * 17. Before installing a A. flange faces are B. flange faces are C. isolating valves D. old gasket is in

new flange gasket be sure that the: painted absolutely clean * are open place

18. On a standard wire gage: A. #10 is larger than #5 B. #25 is smaller than #20 *

C. # 1is smaller than #2 D. #30 is larger than #25

19. Which of the following tools would be most taking leads on bearings? A. dividers C. micrometer * B. outside calipers D. center gage

useful

when

20. The cutting action in on both stokes in A. Open side planer C. Double housing planer B. Pit planer D. Universal planer * 21. The straddle milling is done by means of two A. Side milling cutters * C. Plain milling cutters B. Face milling cutters D. Form cutters 22. The formula to find out the number of turn of the crank simple indexing is A. T=20/N C. T=N/20 B. T=40/N * D. T=N/40 23. In a standard dividing head the ratio between the worm wheel and the worm is A. 10:1 C. 20:1 D. 30:1 D. 40:1 * 24. There are two different movements of the crank in A. Simple indexing C.Compound indexing * B. Differential indexing D. Angular indexing 25. In a vertical milling machine the spindle is situated to the A. Horizontal C. vertical * B. Angular D. None of the above 26. Planer type built machine is built up for work of A. light duty C. heavy duty * B. medium duty D. None of the above 27. In mill A. B.

a straddle milling operation how many cutters are used to the work? One C. Two * Three or more D. Any one of the above

28. All four compression coil spring support one load of 700 kg/mm. All four springs are arranged in parallel and rated same at 0.609 kg/mm. Compute the deflection in mm. A. 64 C. 178 B. 147 D. 287 * 29. A body weighing 1000 lb falls 6 inches and strikes a 2000 lb per in spring. The deformation of the spring is: A. 1 in C. 3 in * B. 2 in D. 6 in 30. A 60 inch diameter steel pipe, 3/8 inch thick, carries water under a pressure head of 550 ft. Determine the hoop stress in the steel. A. 34,320 psi C. 19,066 psi * B. 25,780 psi D. 15,920 psi

31. The maximum moment induced in a simply supported beam of 20 ft span, by a 2000 pound load at midspan is A. 125,000 ft – lb C. 30,000 ft – lb B. 15,000 ft – lb D. 10,000 ft – lb * 32. Determine the length of belt needed for a two flat belt pulleys having a diameter of 70 cm and 30 cm. The center distance is 400 cm and pulleys rotate in same direction. Assume power transmitted is 10 hp at 200 rpm. A. 958 cm * C. 589 cm B. 859 cm D. 895 cm 33. A round steel bar 12 inches long is to withstand a dead load of 40,000 lb in compression. The rod must not shorten more than 0.004 inch and have a factor safety of at least 10. Assume the ultimate strength of the material to be 110,000 psi and modulus of elasticity to be 15,500,000 psi. Determine the diameter of the rod. A. 2.14 in. C. 4.14 in. B. 3.14 in * D. 5.14 in. 34. How long will it take to saw a rectangular piece of steel plate size ½ “ x 4’ x 8’ the length of cut is 4 ft. The power hacksaw makes 120 rpm and the feed per stroke is 0.008 in.? A. 48 min. C. 50 hr B. 0.83 hr * D. 52 min. 35. For gear cutting which cutter is used? A. End mill cutter C. Plain milling cutter B. Form relieve cutter * D. All of the above 36. In a slotter, the table gets ___ different feeds A. One C. Two B. Three * D. None of the above 37. If a clearance of a cutting edge is 15 deg, the lip (wedge) angle in 75 deg, the rake angle will be A. 80 deg C. 70 deg B. 10 deg * D. None of the above 38. The approximate hardness of HSS end mill cutter is A. 45 HRC C. 52 HRC B. 62 HRC * D. 72 HRC 39. When the feed motion takes place in a slotting machine A. during the cutting motion. B. after each forward stroke. C. at the end of return motion. D. after each double stroke. * 40. Which of the following conditions may cause error during knurling? A. to much longitudinal feed. * B. clamped length of tool too short. C. surface speed too low. D. unnecessary support with tail stock center. 41. Mark the milling method during which the formation of the chatter marks is very likely

A. B. C. D. 42. Mark down A. B. C. D.

during down cut milling with a straight tooth cutter. during up cut milling with a straight tooth cutter. * during face milling with a straight tooth cutter. while using spiral tooth cutter. the cutter which works simultaneously with up cut and cut process Side milling cutter. Semi-circular milling cutter. Shell end mill. * Plain milling cutter.

43. A polygon with 9 flats is to be milled using the indexing head. The indexing head transmission ratio is 40:1.Determine the number of crank rotation and mark the correct answer A. 9 full rotation. B. 5 full rotation, 2 holes on the 36 hole circle. C. 4 full rotation, 12 holes on the 27 hole circle. * D. 2 full rotation, 16 hole on the 47hole circle. 44. Where the relieved cutters are reground? A. on the circumstances B. relieved cutters are not reground C. on the flank * D. on the side faces 45. What happens if the job is loosely fitted between centers in cylindrical grindings? A. the job will be out of round. * B. the job will be oversize. C. the job will be thrown out. D. the job will not rotate. 46. Internal and external taper on cylindrical jobs are ground in A. plain cylindrical grinding machine. B. universal cylindrical grinding machine. * C. internal grinding machine. D. centreless grinding machine. 47. Which of the following is used to clean the gauge blocks before and after use? A. Brush B. Cotton waste C. Chamois leather or lenen cloth * D. None of the above 48. The grade of grinding wheel depends upon A. Grain size C. Structure B. Kind of abrasive D. Hardness of bond * 49. Which kind of bond is commonly used? A. Vitrified * C. Rubber B. Shellac D. None of the above 50. The symbol conventionally used for resinoid bond is A. ‘V’ C. ‘R’ B. ‘B’ * D. ‘E’...