NCCER BOILERMAKER EXAM (MAINTENANCE) | ALL QUESTIONS AND CORRECT ANSWERS | GRADED A+, Exams of High Pressure Vessels and Boilers

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NCCER BOILERMAKER EXAM (MAINTENANCE) |

ALL QUESTIONS AND CORRECT ANSWERS |

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VERIFIED ANSWERS

Why should boilermakers crack the cylinder valve before connecting the regulator to the oxyacetylene cylinder ---------CORRECT ANSWER----------- ------To clean the cylinder valve of foreign matter How many people can tie off to a vertical lifeline ---------CORRECT ANSWER----------------- 1 Where should the wire plate be installed ---------CORRECT ANSWER-------- ---------Top of the trays What can replace a shackle pin ---------CORRECT ANSWER----------------- Nothing What are lifting lugs ---------CORRECT ANSWER-----------------Eyelets welded to a steel plate for lifting What is dog plate used for ---------CORRECT ANSWER-----------------Buffers to align vertical plates

What is the proper way to attatchl 2 slings together ---------CORRECT ANSWER-----------------Shackle What characteristic must be checked before a gasket is installed --------- CORRECT ANSWER-----------------Material How should you determine the proper size gasket should be put in a set of flanges ---------CORRECT ANSWER-----------------Size and rating stamped on flange Where can the pass partition of an exchanger be found ---------CORRECT ANSWER-----------------Channel head The most commonly used wrench size for tray work is ---------CORRECT ANSWER-----------------9/ Most common rigging hardware ---------CORRECT ANSWER----------------- Eye bolts Which of the following tools is used to shape a tube to fit a penetration ------ ---CORRECT ANSWER-----------------Tube roller Which of the following is a typical characteristic of a yoke vice --------- CORRECT ANSWER-----------------They are hinged to open vertically

Insulation should be assumed to be asbestos if ---------CORRECT ANSWER-----------------It is not marked otherwise Plumb means ---------CORRECT ANSWER-----------------Vertically aligned In the top and bottom of an acetylene cylinder are safety plugs with a melting point of ---------CORRECT ANSWER-----------------220 degrees A gasket that has holes is a ---------CORRECT ANSWER-----------------Full face gasket To get an accurate reading level between 2 distance points --------- CORRECT ANSWER-----------------Tubing water level A cutting flame that has an excess of oxygen is called an ---------CORRECT ANSWER-----------------oxidizing flame Most common tray ---------CORRECT ANSWER-----------------Value tray Spool drawings ---------CORRECT ANSWER-----------------One piece of pipe only

At what angle is a chain fall usually used? ---------CORRECT ANSWER------ -----------Vertical Pipeline PNID ask for what size the main line is ---------CORRECT ANSWER-----------------12" What does the PNID ask for material ---------CORRECT ANSWER------------ -----A- 335 When attaching two pipes together what fitting is used? ---------CORRECT ANSWER-----------------Coupling When attaching two different pipe sizes together what fitting is used? --------

• CORRECT ANSWER-----------------Bushing What is a tigger? ---------CORRECT ANSWER-----------------Winch What controls water in the towers? ---------CORRECT ANSWER--------------- --(Distributors) internally installed above a packed bed. Which performs the job in providing a finite liquid distribution over the packed bed. What is the minimum rated tie off point? ---------CORRECT ANSWER-------- ---------5,000lbs

What causes a kink in a wire sling? ---------CORRECT ANSWER-------------- ---Sling against a support/structure Where is the flame arrester located? ---------CORRECT ANSWER------------- ----At the handle All of the following are examples of the internal many hardware except? ---- -----CORRECT ANSWER-----------------Slide fastener The fitting that makes it easy to disassemble threaded pipe is? --------- CORRECT ANSWER-----------------Union What is the purpose of a gasket? ---------CORRECT ANSWER----------------- To create a seal between two stationary parts What is the first consideration when making a gasket? ---------CORRECT ANSWER-----------------Material compatibility Ring gaskets may be effected by all of the following except? --------- CORRECT ANSWER-----------------Number of bolts Which way should the teeth face on the hacksaw blade? ---------CORRECT ANSWER-----------------Away from handle

The pressure of 1" and 10" pipe when both are 20' tall? ---------CORRECT ANSWER-----------------The pressure is both the same When making a threaded connection and it stops on second thread? --------

• CORRECT ANSWER-----------------Stop something is wrong Which organization requires a person to be trained to operate personal lifting equipment ---------CORRECT ANSWER-----------------OSHA Where would the usage of a RTJ Gasket be found ---------CORRECT ANSWER-----------------high pressure system All of the following are examples of internal manway hardware except ------- --CORRECT ANSWER-----------------Slide fastener The fitting that makes it easy to dissemble threaded pipe is --------- CORRECT ANSWER-----------------Union What type of wrench measures how much a fastener is being tightened ----- ----CORRECT ANSWER-----------------Torque What is the purpose of a gasket? ---------CORRECT ANSWER----------------- to create a seal between 2 stationary parts

What is the first consideration when making a gasket ---------CORRECT ANSWER-----------------material compatibility In order to get the bundle to line up with the shell side gasket the best tool to use to lift the bundle is a ---------CORRECT ANSWER-----------------drift pin ring gaskets may be affected by all of the following except --------- CORRECT ANSWER-----------------Number of bolts Which way should the teeth face on a hacksaw blade ---------CORRECT ANSWER-----------------Away from handle Pressure of a 1" and 10" pipe when both are 20" tall ---------CORRECT ANSWER-----------------The pressure is both the same When making a threaded connection and it stops on 2nd thread.... --------- CORRECT ANSWER-----------------Stop, something is wrong When using a sealing ring on heat exchanger, what material is used to seal off in between the floating tube sheet and test ring? ---------CORRECT ANSWER-----------------Permatex For duct bolted together there is usually some kind of ---------CORRECT ANSWER-----------------gasket

If the end of a tube sheet of an exchanger has been smashed this is caused by all of the following except ---------CORRECT ANSWER------------- ----The partition plate being to short Which of the following should be removed when pressure testing the vessel ---------CORRECT ANSWER-----------------relief valve What components are attached to the baffle on an exchanger tube bundle - --------CORRECT ANSWER-----------------Tie rods All of the following are safety hazards associated with vessel confined space except ---------CORRECT ANSWER-----------------improper inspection Valves used to relieve pressure in a pipeline ---------CORRECT ANSWER-- ---------------safety valve What tool can be used to generate force making tightening or loosening easier ---------CORRECT ANSWER-----------------impact Washers are used to prevent fasteners from marrying? ---------CORRECT ANSWER-----------------surface Title blocks are found where ---------CORRECT ANSWER----------------- Bottom right corner

The following threaded fitting requires a thread lubricant except --------- CORRECT ANSWER-----------------rubber Taps are used to cut what type of threads? ---------CORRECT ANSWER---- -------------internal threads chain hoist are primarily used for what type of lifting ---------CORRECT ANSWER-----------------vertical lifting Oxyfuel torch what valve must be turned off first ---------CORRECT ANSWER-----------------Acetylene What does SWL stand for? ---------CORRECT ANSWER-----------------Safe Working Load On a variable can (spring can) support, when are the load straps removed - --------CORRECT ANSWER-----------------Just prior to energizing the system When rigging a valve the spring should be placed around the --------- CORRECT ANSWER-----------------body Minimum required oxygen and fuel gas storage separation when not in use and stored in open areas ---------CORRECT ANSWER-----------------20'

When tightening up a manway or tower that has 1 1/4" x 8" stud bolts, what size wrench should you use ---------CORRECT ANSWER-----------------2" What should a worker do before removing flange bolts on the exchanger channel head ---------CORRECT ANSWER-----------------verify blinds are in, bleeders are open, and loto is complete What does NPT stand for? ---------CORRECT ANSWER----------------- National Pipe Thread Flange protector should be removed from the valve when --------- CORRECT ANSWER-----------------ready for installation Which sling configuration has the greatest capacity ---------CORRECT ANSWER-----------------basket Tube sheet ---------CORRECT ANSWER-----------------To pull a bundle from the shell the eye bolts should be installed on the What is the standard pipe thread used in the USA ---------CORRECT ANSWER-----------------NPT

What type of metal would an oxyfuel torch be used to cut ---------CORRECT ANSWER-----------------carbon steel When doing hydrostatic where should the gauge be installed in the system ---------CORRECT ANSWER-----------------highest point All of the following would be reasons for rejecting a sling except --------- CORRECT ANSWER-----------------ID tag on the wrong side Which of the special markings on the head of a bolt can be used to determine the quality of the fastener ---------CORRECT ANSWER------------- ----grade What type of tray had a flat perforated with a riser of chimney fitted over each ---------CORRECT ANSWER-----------------bubble What type of bolt can be used as a lifting device ---------CORRECT ANSWER-----------------eye bolt To help control a load install a ---------CORRECT ANSWER----------------- Tag line What is the first step when cutting a gasket ---------CORRECT ANSWER---- -------------Verify proper material

According to osha the fall protection tie off point must have a minimum rating of ---------CORRECT ANSWER-----------------5000 lbs All of the following are standard methods for thread identification except ---- -----CORRECT ANSWER-----------------Packing series symbol When plugging a straight tube exchanger in the shell all of the following heads need to be removed except ---------CORRECT ANSWER----------------

• Tub head Under which circumstances are the shell and tube side pressurized at the same time ---------CORRECT ANSWER-----------------When performing a differential hydro test Where can an exchangers operating pressure be found ---------CORRECT ANSWER-----------------On the name plate When blinding a tower it is common practice to install blinds --------- CORRECT ANSWER-----------------As close as possible to the tower The correct tool to remove a broken pipe nipple is ---------CORRECT ANSWER-----------------Easy out head pressure testing is used on what type of system ---------CORRECT ANSWER-----------------gravity flow

3 basic type of hitches ---------CORRECT ANSWER-----------------Basket, choker, vertical In an oxyfuel cutting torch system what color code are the flashback arrestors ---------CORRECT ANSWER-----------------Red & Green Valves controlled by electric, pneumatic, or hydraulic actuators are called -- -------CORRECT ANSWER-----------------Control valves What is the 1st step that should be done with the paint on the surface of a vessel ---------CORRECT ANSWER-----------------Sample it prior to use a spreader must be inspected for ---------CORRECT ANSWER- ----------------Gouges cladding is used for corrosion protection over ---------CORRECT ANSWER- ----------------carbon steel The hitch made by wrapping the sling around the load, then passing one eye of the sling ---------CORRECT ANSWER-----------------Choker hitch What are the components on a gate valve ---------CORRECT ANSWER------ -----------Body, Bonnet, gate, stem

Most common used fasteners ---------CORRECT ANSWER----------------- Anchor bolts Why must spring can be adjusted after it is out into service --------- CORRECT ANSWER-----------------Line becomes heavier after put into service Bolts used in concrete ---------CORRECT ANSWER-----------------Expansion anchor bolts Variable pipe support a boilermaker must verify ---------CORRECT ANSWER-----------------Proposed length of travel has no obstructions Needs only one end open for the ---------CORRECT ANSWER----------------- Hairpin What type of tank has legs on the roof ---------CORRECT ANSWER----------- ------Floating roof Why is envelope gasket used in h8 acid piping ---------CORRECT ANSWER-----------------Because of its high resistance to acid

What Prevents tubes from sagging ---------CORRECT ANSWER--------------- --Baffles Which gas passes through the center of a cutting torch tip --------- CORRECT ANSWER-----------------Oxygen What is the major component of a tower ---------CORRECT ANSWER-------- ---------Down comer Best rigging material to lift coated pipe ---------CORRECT ANSWER---------- -------Nylon slings/ straps A channel head cover on an exchanger is used on the? ---------CORRECT ANSWER-----------------Tube side What type of purge is used to remove catalyst from a reactor --------- CORRECT ANSWER-----------------Nitrogen When using a sealing ring on heat exchangers what material is used to seal off in between the floating tube sheet and test ring? ---------CORRECT ANSWER-----------------Permatex For duct bolted together there is usually some kind of? ---------CORRECT ANSWER-----------------Gasket

In the end of a tube sheet of an exchanger had been smashed this is caused by all of the following except? ---------CORRECT ANSWER----------- ------partition plate being too short Which of the following should be removed when pressure testing the vessel ---------CORRECT ANSWER-----------------Relief valve All of the following are safety hazards associated with vessel confined space except? ---------CORRECT ANSWER-----------------Improper inspection Valves used to relief pressure in a pipe line? ---------CORRECT ANSWER-- ---------------Safety valve What tool can be used to generate force making tightening amid loosing easier? ---------CORRECT ANSWER-----------------Impact Title blocks are found where? ---------CORRECT ANSWER----------------- Bottom right corner Taps are used to cut what type of threads? ---------CORRECT ANSWER---- -------------Internal Oxyfuel torch what valve must be turned off first? ---------CORRECT ANSWER-----------------Acetylene

What does SWL stand for? ---------CORRECT ANSWER-----------------Safe working load When tighten up a manway or tower that has 1" 1/4 by 8" stud bolts what size wrench should you use? ---------CORRECT ANSWER-----------------2" What valve can start and stop without regulating flow? ---------CORRECT ANSWER-----------------Gate valve What valve can start & stop & WILL regulate flow? ---------CORRECT ANSWER-----------------Globe valve What valve can be placed with out directional flow? ---------CORRECT ANSWER-----------------Gate valve If crane booms up the load will? ---------CORRECT ANSWER----------------- Go up and towards the crane If crane booms down the load will? ---------CORRECT ANSWER--------------- --Go down and away from crane How to you plug up exchanger tubes? ---------CORRECT ANSWER----------- ------Pop-A-Plug

When making a Pipe thread connection where should you apply liquid lubricant? ---------CORRECT ANSWER-----------------Male threads When making a tight close seal on a threaded pipe which wrench should you use? ---------CORRECT ANSWER-----------------Pipe Wrench When is it allowed for the load not to have a tag line? ---------CORRECT ANSWER-----------------Both OSHA and industry standards require the use of taglines unless the load configuration and weather conditions are such that load control is not needed What does packing do for the valve stem? ---------CORRECT ANSWER----- ------------Stop it from leaking What is the safest way to light an oxy acetylene? ---------CORRECT ANSWER-----------------Friction starter When sealing an exchanger tube how do you seal it? ---------CORRECT ANSWER-----------------Pop-A-Plug How do you use two straps together? ---------CORRECT ANSWER------------ -----Shackle

What way will the shackle bolt face when rigged with 4 slings? --------- CORRECT ANSWER-----------------Bolt down What is a combination square ---------CORRECT ANSWER----------------- (Picture) If you were needing to make a repair on a "U"tube bundle what needs to be removed? ---------CORRECT ANSWER-----------------Dollar Plate What components are attached to the baffle on an exchanger tube bundle? ---------CORRECT ANSWER-----------------Tie Rods In order to get the bundle to line up with the shell side gasket the best tool to use to lift the bundle is a? ---------CORRECT ANSWER-----------------Drift Pin How far should a screw eye bolt be screwed in so it's properly seated? ------ ---CORRECT ANSWER-----------------All the way in Pack beds are bound in all of the following except for? ---------CORRECT ANSWER-----------------Furnaces What do baffles do for an exchanger bundle? ---------CORRECT ANSWER- ----------------Support the tubs during assembly and operations and help prevent vibration from flow-induced eddies

What is the proper way to place a pin in a shackle? ---------CORRECT ANSWER-----------------All the way and back it out a hair How should a gasket face when using nubbin? ---------CORRECT ANSWER-----------------Smooth side towards the nubbin What is the purpose for nubbin? ---------CORRECT ANSWER----------------- Predominately machined into a heat exchanger flange to create a high stress to produce a tighter seal What type of wrench measures how much a fastener is being tightened? --- ------CORRECT ANSWER-----------------Torque Where would the usage of a RTJ Gasket be found? ---------CORRECT ANSWER-----------------High Pressure System Washers are used to prevent fasteners from marrying? ---------CORRECT ANSWER-----------------Surface To pull a bundle from the shell the eyebolts should be installed on the? ----- ----CORRECT ANSWER-----------------Tube steel What type of bolt can be used as a lifting device? ---------CORRECT ANSWER-----------------Eye Bolt

When plugging a straight tube exchanger in the shell all of the following heads need to be removed except? L ---------CORRECT ANSWER------------ -----Tube Head Find the wrench size using the bolt diameter equation? ---------CORRECT ANSWER-----------------Turn it into a fraction, find common denominator, divide in half, add 1/8th, then add it to the whole fraction and complete the fraction

1. Which organization requires a person to be trained in order to operate personal lifting equipment a. osha b. ansi c. nfpa d. asme ---------CORRECT ANSWER-----------------A. OSHA
2. Where would the usage of a RTJ Gasket be found e. High pressure system f. Low pressure system g. Water system h. Air system ---------CORRECT ANSWER-----------------e. High pressure system
3. All of the following are examples of internal manway hardware except i. Football washer j. Slide fastener k. Half washer l. Bellville washer ---------CORRECT ANSWER-----------------J. Slide fastener

4.What type of wrench measures how much a fastener is being tightened m. combination n. crescent o. torque ---------CORRECT ANSWER-----------------O. Torque 5.the fitting that makes it easy to disassemble threaded piping is p. coupling q. union r. tee s. nipple ---------CORRECT ANSWER-----------------Q. Union 6.what is the purpose of a gasket t. to create a seal between 2 stationary parts u. to fill excessive gap v. to hold bolts on the proper spacing w. to prevent gouging of flange faces ---------CORRECT ANSWER------------ -----t. to create a seal between 2 stationary parts

7. What is the 1st consideration when making a gasket x. Material compatibility y. Od of the flange z. ID of the flange aa. Bolt circle ---------CORRECT ANSWER-----------------x. Material compatibility
8. In order to get the bundle to line up with the shell side gasket the best tool to use to lift the bundle is a bb. Pipe jack cc. Flange spreader

dd. Finger wedge ee. Drift pin ---------CORRECT ANSWER-----------------ee. Drift pin How often should you inspect any type of rigging device ff. daily gg. before each use hh. monthly ---------CORRECT ANSWER-----------------gg. Before each use

10. ring gaskets may be affected by all of the following except ii. torque on the bolts jj. number of bolts kk. system temperature ---------CORRECT ANSWER-----------------jj. Number of bolts
11. CHAIN slings should be visually inspected ll. annually mm. quarterly nn. before each use oo. monthly ---------CORRECT ANSWER-----------------ll. Annually
12. which way should the teeth face on a hack saw blade pp. away from stem qq. toward the handle rr. away from the handle ss. towards the wingnut ---------CORRECT ANSWER-----------------rr. Away from the handle
13. to prevent injury due to crushing between crane sand other objects what must be used

tt. synthetic slings uu. barricades vv. whip line ---------CORRECT ANSWER-----------------uu. Barricades

14. which is true when comparing head pressure if a 1" pipe and a 10" pipe when both are 20' tall ww. the 1" pressure is more xx. the 10" PRESSURE IS 5x MORE yy. the pressure is the same zz. the 10" pressure is 10x more/ ---------CORRECT ANSWER----------------- yy. The pressure is the same
15. when making a threaded connection the fitting stops on the 2nd thread the next step is aaa. stop the connection is done bbb. stop something is wrong ccc. continue tightening ---------CORRECT ANSWER-----------------bbb. Stop something is wrong
16. when using a sealing ring on a heat exchanger what material is used to seal off in between the floating tube sheet and test ring ddd. permatex eee. Teflon caulk fff. Packing ggg. ant seize ---------CORRECT ANSWER-----------------ddd. Permatex
17. for duct sections bolted together there is usually some kind of seal or hhh. wedge

iii. pin jjj. gasket kkk. packing ---------CORRECT ANSWER-----------------jjj. Gasket

18. the end of a tube in an exchanger has been smashed, this is caused by all of the following except lll. warping of the partition plate mmm. the channel head not being in the correct orientation nnn. the partition plate being too short ooo. The bundle not being level ---------CORRECT ANSWER----------------- nnn. The partition plate being too short
19. which of the following should be removed when pressure testing the vessel ppp. relief valve qqq. gate valve rrr. plugs sss. internals ---------CORRECT ANSWER-----------------ppp. Relief valve
20. what components are attached to the baffle on an exchanger tube bundle ttt. tie-rods uuu. plugs vvv.bell head www. toggle bolts ---------CORRECT ANSWER-----------------ttt. Tie rods
21. all of the following are safety hazards associated with vessel confined space except xxx.improper lighting yyy. improper inspection