Intoduction to Boilermaking Terms

Question 1

Align

Answer 1

To line up two or more parts

Question 2

Alloy

Answer 2

A fused mixture of two or more metals, or a metal and one or more other metals and/or nonmetals

Question 3

Alternating Current (AC)

Answer 3

Electrical current that reverses its flow at set intervals

Question 4

American Iron and Steel Institute (AISI)

Answer 4

An industry organization responsible for preparing standards for steels and steel alloys based on the SAE code system

Question 5

American Society of Mechanical Engineers (ASME)

Answer 5

An organization that has developed and maintains many of the codes used in the construction of boilers and pressure vessels

Question 6

Amperage

Answer 6

A measurement of the rate of flow of electric current

Question 7

Arc

Answer 7

Flow of electricity through an air gap that melts the electrode

Question 8

ASTM International

Answer 8

An organization that developed a code system for identifying and labeling steels

Question 9

Backfire

Answer 9

a loud snap or pop as a torch flame is extinguished

Question 10

Backing

Answer 10

a weldable or nonweldable material used behind a root opening to allow defect-free welding at the open root of a joint

Question 11

Bag house

Answer 11

A structure containing bags that filter flue gas to remove fly ash

Question 12

Base metal

Answer 12

metal to be welded, cut, or brazed

Question 13

Bit

Answer 13

Any of a number of tools for use with a drill or grinder

Question 14

Black liquor

Answer 14

A byproduct of the papermaking process. It consists of a mixture of limestone, salkcake, water and lignin

Question 15

Boiler feedwater

Answer 15

The water supplied to a boiler to produce steam

Question 16

Breeching

Answer 16

The duct or pipe connecting the exhaust-gas discharge from a boiler furnace to the stack

Question 17

Buckstays

Answer 17

Retaining beams that are placed around the furnace sidewalls every 80-20 feet to prevent the walls from blowing out should there be an explosion in the furnace

Question 18

Burr

Answer 18

A sharp, ragged edge of metal usually caused by cutting

Question 19

Carbide

Answer 19

A very hard material made from a mixture of carbon and metal

Question 20

Carburizing flame

Answer 20

A flame burning with an excess amount of fuel; also called a reducing flame

Question 21

Chamfer

Answer 21

A bevel cut into the edge of thebase metal

Question 22

Chuck

Answer 22

A part of drill that allows attachments of different size bits

Question 23

Co-generation

Answer 23

A facility that uses waste heat or other products from a process to produce electricity

Question 24

Code

Answer 24

A set of regulations covering permissible materials, service limitations, fabrication, inspection, testing procedures, and qualifications of welders

Question 25

Coefficient of thermal expansion

Answer 25

The amount a unit length of material expands for each degree of temperature increase

Question 26

Collet

Answer 26

Part of a grinder or other tool that allows different attachments to be used with them. Usually requires two wrenches to operate

Question 27

Combustion residue

Answer 27

Byproducts of combustion which build up inside a boiler during operation. This residue can build up in large quantities and can become a hazard during maintenance operations should it break loose and fall