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BOILERMAKER MAINTENANCE EXAM (NCCER
EXAM) | QUESTIONS AND CORRECT ANSWERS
| GRADED A+ | LATEST VERSION | VERIFIED
ANSWERS
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 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
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
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
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
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
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 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
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
