Question

1. the type of cutting torch that uses a vacuum created by oxygen flow to draw in fuel from a very - low - pressure fuel source is a(n) ______.

a. siphon torch
b. inert torch
c. injector torch
d. suspension torch

1. a friction lighter produces sparks when its steel surface is rubbed with a piece of ______.

a. flint
b. soapstone
c. graphite
d. steatite

1. a computer - controlled plate cutting machine and an optical pattern - tracing machine are examples of ______.

a. portable oxyfuel cutters
b. exothermic machines
c. manual guide cutters
d. fixed - location machines

1. cracking the cylinder valves during the setup of oxyfuel equipment is a way of ______.

a. leak testing the valve regulators
b. equalizing the cylinder pressures
c. removing dirt from the valves
d. venting residual gas from the cylinders

1. before opening cylinder valves, verify that the adjusting screws on the oxygen and fuel gas regulators have been ______.

a. tightened
b. closed
c. loosened
d. purged

1. oxyfuel cutting equipment is typically leak tested using a(n) ______.

a. supervisor’s sense of smell
b. solution that produces bubbles
c. lit match or a candle
d. ultrasonic detector

1. an oxyfuel cutting flame that has an excess of fuel is called a(n) ______.

a. hot lean flame
b. neutral flame
c. oxidizing flame
d. carburizing flame

1. when disassembling oxyfuel equipment, verify that all pressure gauges are ______.

a. reading zero
b. open and showing atmospheric pressure
c. chained securely to each other
d. marked “mt” for storage

1. gas cylinders should never be completely emptied because of the risk of ______.

a. reverse flow
b. valve cracking
c. disproportional mixing
d. cylinder implosion

1. when a cut has been made with oxyfuel cutting equipment, the drag lines of the cut should be close to ______.

a. thirty degrees with minimal notching
b. forty - five degrees with a wavy kerf
c. horizontal and notched at the kerf
d. vertical and not very pronounced

1. a major concern when cutting thin steel with an oxyfuel cutting torch is ______.

a. flashback
b. sparking
c. distortion
d. backfire

1. an oxyfuel cutting process that is often used for cutting off bolts, rivets, and other projections is called ______.

a. beveling
b. gouging
c. piercing
d. washing

1. what part of an oxyfuel track burner controls the vertical positioning of the torch?

a. the clamping screws
b. the torch holder
c. the kerf regulator
d. the bevel adjustment

Explanation:

Answer:

1. a. siphon torch
2. a. flint
3. d. fixed-location machines
4. c. removing dirt from the valves
5. c. loosened
6. b. solution that produces bubbles
7. d. carburizing flame
8. b. open and showing atmospheric pressure
9. d. cylinder implosion
10. c. distortion
11. b. gouging