Power Engineering Technology – MechanicalPSE 815 – Industrial Legislation and Safety

4 th Class Part A Exam Review Unit 7 – Safety (Chapters 29 to 36); Unit 8 – Plant Fire Protection (Chapters 37 to 39)Unit 11 – Piping (Chapters 49 to 50); Unit 12 – HP Boiler Design (Chapters 51 to 55)

Study the chapters listed and review the power points on Blackboard before attempting this review exam

Name: ____________________________ Date: _________________Circle the most appropriate answer for each question.

a. The first step an employer should take to reduce the negative effects of workplace injuries is:

a. Employ an onsite nurseb. Ensure supervisors know how to contact emergency assistancec. Institute an effective health and safety program in the work placed. Establish an appropriate number of trained first aid personnele. Inform his or her supervisors of the importance of maintaining close contact with

any worker who may become injured

2. The highest proportion of injuries are reported by employees in the age group of:a. 16 to 25 yearsb. 26 to 35 yearsc. 36 to 45 yearsd. 46 to 55 yearse. over 55 years

3. Before disconnecting an empty cylinder from a manifold system:a. Close the cylinder valve to prevent air entering the cylinderb. Check the area for gases with an analyzerc. Unchain the cylinderd. Crack the connecting joint in order to purge it of excess gasese. None of the above

4. A gas cylinder hydrostatic test will:a. Result in a new test date being stamped on the cylinder or a tag affixed to the

cylinderb. Mean the cylinder is subjected to a pressure three times its maximum allowable

working valuec. Mean the cylinder is subjected to a pressure of one and one quarter times its

working pressured. Remove any dents the cylinder may containe. Indicate whether or not the unit was exposed to very high temperatures

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5. Confined space entry rules apply where the work in progress may cause:a. Too much noise to withstandb. Equipment being used to become a hazardc. The worker to refuse to perform his jobd. An accidente. Moisture vapours to be released in the atmosphere

6. A confined space may easily become a:a. Difficult place to maneuver inb. Breeding ground for bio-hazardous infectious substancesc. Noisy entrapmentd. Health environmente. Life threatening environment

7. The pressure in a fully charged Self-Contained Breathing Apparatus is:a. 31.03 kPab. 101.3 kPac. 28.95 inches of Hgd. 31.03 MPae. 3.13 kPa

8. The flash point of a liquid is the temperature at which:a. All molecular vibration will ceaseb. It will form a gas and ignitec. Spontaneous combustion will occurd. The liquid will burne. The vapours will become inert

9. When extinguishing a fire, you aim the discharge of the extinguisher:a. One foot above the flamesb. At the flamesc. At the base of the flamesd. At the sides of the flames in a circling motione. In a rapid sweeping up and down motion

10. The laws covering the certification and authorization of welding on pressure vessels or boilers is/are specified in:

a. American Welders Manualb. Canadian Boiler and Refiners Handbookc. Welders Weekly Magazined. Government of Canada Federal Welding Acte. Provincial Boiler and Pressure Vessels Act

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11. Before the operator enters a confined space, that has been prepared and has a valid permit, the final step would be to:

a. Have the safety person at the entrance ready to helpb. Check the structure for safetyc. Check the oxygen volume level and applicable gas tests againd. Remove the air mover to open up the entrancee. Sound the warning alert

12. The final component of the WHMIS system is:

a. The supplier labelb. An MSDSc. A workplace labeld. Employee traininge. A decanting procedure

13. A workplace label:

a.Must have a hatched borderb. Is always red in colourc.Is almost always required when decanting occursd. Need show only risk phrasese.Consists of two main parts

14. Oxyacetylene cutting is accomplished by:a. Chemical reaction of oxygen and base metal at high temperaturesb. Burning acetylene at low pressure with oxygenc. Combining oxygen and acetone at a low temperatured. Chemical reaction of oxygen, carbon dioxide and acetylenee. Oxidation of acetylene and nitrogen

15. Which heat treatment procedure is performed before the welding takes place in order to relieve metal stress?a. Post heatingb. Preheatingc. Surface heatingd. Root heatinge. Stress heating

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16. The two basic types of welds used in boiler construction are:a. Fusion joint and metal arcb. Groove weld and filet weldc. Lap joint and tee jointd. Brazing weld and post welde. Root weld and bead weld

17. Process metallurgy deals with:a. Metal structures such as body center cube lattice and face center cube latticeb. Physical properties of the metalc. Refining of metals from their ores and into final productd. Mechanical properties of the metale. Chemistry of the metal

18. The mechanical property that best describes the ease with which a metal may be drawn out is defined as:

a. Toughnessb. Elasticityc. Ductilityd. Malleabilitye. Weight

19. When metal is heated and then dipped in a bath of tepid water, the process is called:

a. Annealingb. Temperingc. Normalizingd. Quenchinge. None of the above

20. A gate valve with markings on the side of its body stating 300 WOG indicates:a. To be used only to throttle flowb. Manufacture markings indicating that it can be used as a globe valvec. Has a pressure drop of 300 kPa without gasd. Maximum flow of 300 GPM in Water or 300 Cubic feet in Gase. 300 PSI, Water, Oil or Gas

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21. Proper soldering or brazing technique dictate that the purpose of the flux is to:

a. Flush dirt and grit off the surfaces to be joinedb. Glue the solder to the surfaces to be joinedc. Clean oxide from the surfaces to be joinedd. Lower the viscosity of the solder so that it will flow easilye. To increase the temperature so that brazing technique works

22. Cast iron is produced in the following type of furnace:

a. The Vacuum electrode furnaceb. The Cupola furnacec. The Electric furnaced. The basic oxygen furnacee. The boiler furnace

23. The drawings above are:

a. Standard ring, Bolt hangerb. Swivel roll, Spring hangerc. Pipe roll stand, Anchor chaird. Clevis hanger, Standard ringe. Tapered stand, Ring ladder

24. The criteria for a combustible liquid is a flash point between:

a. 23 degrees C and 37.8 degrees Cb. 61 degrees C and 93.3 degrees Cc. 37.8 degrees C and 93.3 degrees Cd. 23 degrees F and 37.8 degrees Fe. no specified criteria

25. Metals that are very soft and easily workable have a ___________ property.

a. Ductileb. Elasticc. Plasticd. Malleable e. Tough

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26. A check valve is a valve that:a. Is required on all boilersb. Allows flow in two directionsc. Allows flow only in one directiond. Allows flow at various intervalse. Does not allow flow at all

27. A steam piping system that has been sitting idle for several days must have _____________________________ before admitting steam to it.

a. All the valves openb. All the condensate drainedc. All the drains be opend. All the drains be closede. All the by-pass valves closed

28. Large lengths of steam or process piping are equipped with expansion bends to allow for:

a. A flexible construction methodb. The piping to be laid around tight cornersc. A less precise manufacturing methodd. Larger volumes of steam to pass through the steam linese. Expansion and contraction of the steam line

29. An eccentric reducer is mainly used to:a. Assure that steam and condensate continue to flowb. Assure that condensate is separated from the steamc. Assure that the condensate continues to drain from the steam lined. Assure that no steam remain in the linee. Reduce the discharge from the steam trap

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30. The drawing above represents the equipment used for ______________________ testing.

a. Charpy hardness b. Brinnell hardnessc. Izod hardnessd. Standard brittlenesse. Non-destructive

31. The principle of the testing equipment in the drawing above is:

a. Oil is sprayed on to the test specimen to penetrate the metalb. The masses (weights) are added to increase the pressure and force the

plunger into the test specimenc. Oil under pressure forces the plunger to make an indentation on the

test specimend. Oil under pressure is increased by the addition of the masses (weights)

to make an indentation on the test specimene. The jack screw is turned below the test specimen until it reaches a

certain pressure on the gauge

32. Common shell and drum thickness range is:a. 2 to 12 mmb. 6 to 250 mmc. 15 to 300 mmd. 100 to 1000 mme. 200 to 250 mm

33. One or more steel plates rolled into cylindrical form and welded together, with the ends closed by means of end plates or heads, is called a:

a. Combustion chamberb. Packaged boilerc. Shell and drumsd. Steam headere. Steam space

34. The circumferential seam of a riveted boiler shell utilized the:a. Lap joint, single or double rivetedb. Treble riveted butt jointc. Double equal strap double riveted butt jointd. Double unequal strap treble riveted butt jointe. Always a single riveted lap joint

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35. Head to drum circumferential joints are usually:a. Double welded butt jointsb. Single welded edge jointsc. Fillet welded corner jointsd. Double welded tee jointse. Fillet welded lap joints

36. Post weld heat treatment is:a. To make the material hot enough for weldingb. Heating the material after weldingc. To improve weld penetrationd. To clean up the welded areae. Done to reduce corrosion

37. How many passes do most modern scotch marine packaged fire tube boilers have?a. 1 passb. 2 passesc. 1 or 2 passesd. 3 or 4 passese. 8 passes

38. Which of the following packaged boiler design is the most popular for high pressure application?

a. A-typeb. O-typec. D-typed. HRT boilere. Locomotive boiler

39. Which boiler design has 3 drums, one on the top and two on the bottom?a. A-typeb. O-typec. D-typed. HRT boilere. Locomotive boiler

40. What is not an advantage of a 4 pass fire tube boiler?a. The boiler efficiency is too highb. Large fan power requirementsc. Quality workmanship since it is factory builtd. Compact in sizee. Quick installation

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41. Which is a characteristic of a down comer tube in a water tube boiler?a. Cooler water travels in the boiler tubesb. Hot water surrounds the boiler tubesc. Water and flue gases travel counter current in the boiler tubesd. Flue gas travels in the boiler tubese. Water and fuel surround the boiler tubes

42. Tube sheets are used to:a. Improve expansion in a firetube boilerb. Enclose a water tube boilerc. Support the fire tubes between their two endsd. Provide bottom support for a water tube boilere. Construct both firetube and water tube casings

43. The best and most common method of joining boiler plates is:a. Electric resistance weldingb. Silver brazingc. Gluingd. Rivetinge. Gas MIG or TIG welding

44. Which pass is performed first when welding a butt joint?a. Cover passb. Filler passc. Root passd. Single passe. Double pass

45. Water tube boilers are not constructed with any internal boiler stays because:a. Water tube boilers do not have any flat surfacesb. The cost would be too highc. Firetube boilers work at higher pressuresd. There would be no place to attach the stayse. Water tube boilers are too tall

46. Steam generators, in most cases use the following type of support:a. Bottom supportb. Top supportc. Floor supportd. Skid mounte. Packaged

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47. In early boilers, firewalls were constructed of brick. Today this has been replaced by:a. Bafflesb. Steel casingc. Tubes to form the furnace wallsd. Asbestos insulatione. Plastic cement like refractory material

48. Single welded butt joints:a. Are used on very thick boiler platesb. Have the filler metal applied from one side onlyc. Must have a double welding procedured. Are never used for boiler fabricatione. Have the filler metal applied to both sides of the joint

49. A cross drum straight tube boiler:a. Does not have a higher capacity than a longitudinal drum unitb. Is normally only of single pass designc. Can have more inclined tubes than a longitudinal drum unitd. Is a very popular design in today’s modern plantse. Was internally fired

50. The two most basic welds used in boiler construction are:a. Fusion joint and metal arcb. Groove weld and filet weldc. Lap joint and butt jointd. Brazing weld and post welde. MIG weld and TIG weld

51. To prevent settling and movement, a boiler is equipped with:a. Dampening padsb. Properly engineered foundationsc. Piping supports and hangersd. Long stay boltse. All of the above

52. The steam produced by an electrode type boiler depends on:a. The voltage supplied to the elementsb. The level of water in the basketc. The number of heating elements engagedd. The number of bafflese. The amperage supplied to the elements

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53. Which type of water wall was first introduced for steam generators after brick work?a. The tangentb. The membranec. Welded Fin tubed. The flat studdede. The tube and brick

54. Refractory is not used to a great extent in steam generators because:a. It is difficult to produceb. It is difficult to locatec. It was only used for small boilersd. It is not used on water tube boilerse. It is not suitable for high temperature boilers

55. The term “header” refers to:a. The largest tube on the boilerb. The large collecting pipe used to distribute steam to other locationsc. The blow down steam lined. The collection of chemicalse. As part of an engine

56. A boiler having 47 square metres of heating surface should have ________________ safety valve(s)?

a. 1b. 2 or morec. A minimum of 3d. No less than 4e. Any number of

57. Fusible plugs are used for the following purpose:a. To drain a water tube boilerb. To drain a fire tube boilerc. To give the operator a warning of low boiler water leveld. To shut down the boiler in case of a high pressure conditione. To plug a boiler when a tube leak has been detected

58. The aspect which acts to hold a manhole door in place during boiler operation is:a. The boltb. The combination of the bolt and yokec. Pressure within the boilerd. The manhole gaskete. The yoke

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59. The advantage of an economizer in a steam generator is to:a. Decrease the amount of draftb. To recover waste heatc. Control water levels in the steam drum betterd. Decrease the amount of continuous blow down e. Allow more fuel to be used

60. The disadvantage of an economizer in a steam generator is:a. The increase of draftb. Recovery of waste heatc. Higher differential pressure between furnace and stackd. The use of more fuele. None of the above

61. When a firetube boiler is called a wetback boiler, it means that:a. The tubes are surrounded by waterb. The combustion chamber is not cooled by boiler waterc. The rear reversing chamber is surrounded by waterd. The front burner compartment is surrounded by watere. Steam is produced at between 70 to 90 percent dryness fraction

62. A characteristic which made early boilers very inefficient was:a. Lack of heating surfaceb. An excess of flat surfacesc. The internal furnaced. Lack of good quality fuelse. Inadequate water treatment

63. The first type of early firetube boiler that incorporated an internal furnace was the:a. HRT boilerb. Scotch marine boilerc. Longitudinal drum firetube boilerd. Locomotive boilere. Circular bellows boiler

64. For horizontal firetube boilers, the lowest visible water level in the gage glass is set not less than _________ above the highest point of the tubes.

a. 18 mmb. 25 mmc. 76 mmd. 18 cme. 1 m

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65. The component that is used to increase the volume of the steam space in a locomotive boiler is called the:

a. Crown sheetb. Steam legc. Shell headd. Steam domee. Dry pipe

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