Exam (elaborations)
PIPEFITTER NCEER CERTIFICATION EXAM
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PIPEFITTER NCEER CERTIFICATION EXAM
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PIPEFITTER NCEER CERTIFICATION EXAMStainless steel wire brushes are excellent for use with corrosive solutions - ANSWER
True
Which of the following substances reacts
violently with acetone ? - ANSWER Sodium Hydroxide
When mixing water and acid _________? - ANSWER always mix the acid material
into the water
Another name for straight oils is , - ANSWER Neat
To prevent lubricant from getting into the piping , the lubricant should be placed only
on the_____ - ANSWER Male Threads
Emulsifiable lubricants are mixed with water a soon as they received from the vendor
- ANSWER False
A popular base for anti - seize compounds is - ANSWER Copper
When a two - part epoxy putty is mixed , what type of reaction occurs ? - ANSWER
Exothermic
Sealants should be kept very warm at all times to prevent curing - ANSWER False
During the cutting process , cutting oils are used to reduce - ANSWER Heat and
friction
The two classifications of cutting oils are active and - ANSWER Inactive
Active cutting oils contain - ANSWER Sulfur
Straight oils are frequently used to tap and thread - ANSWER White Metals
The color of PTFE tape typically specified for use on natural gas piping is - ANSWER
yellow
One common ingredient of pipe joint
compounds is - ANSWER clay
Penetrating oils do not make good long - term lubricants because they - ANSWER
Evaporate Quickly
Which of the following statements about anaerobic resin compounds is true ? -
ANSWER They do not contain solvents
All epoxy products come in the form of a putty . - ANSWER False
, Which type of metal wool burns readily and can be used as tinder in an emergency ?
- ANSWER Steel
The abrasive on emery cloth is an impure version of - ANSWER Corundum
Naphtha is an example of what type of cleaner or solvent? - ANSWER Petroleum-
based
Strong acids may also be referred to as - ANSWER Caustics
Isopropyl alcohol ( IPA ) is most likely to be used - ANSWER to clean electronic
circuit boards
Acetone is a good choice for use as a cleaning solution where welding operations
are ongoing - ANSWER False
A gasket for a raised - face flange has no bolt holes - ANSWER True
Gaskets made of natural rubber are not compatible with systems containing -
ANSWER petroleum products
The type of gasket designed to compensate for temperature and pressure variations
in high pressure systems is the - ANSWER spiral wound gasket
When assembling a flange , the bolts can be aligned using a___ - ANSWER dritt
pin
Which of these types of O - rings is not compatible with petroleum products ? -
ANSWER Ethylene propylene
Lubricated graphite yam is a type of___ - ANSWER packing
What does a direct - operated pressure - reducing regulator use as its controlling
element ? - ANSWER Downstream pressure
Pilot - operated regulators position the regulating valve by - ANSWER using an
external energy source
In general , when selecting a spring range for a regulator , select one that includes
the desired setpoint - ANSWER near the middle of the range
Most of the drying agents used in the deliquescent drying process are - ANSWER
Highly Corrosive
In a refrigerated air dryer , the system rejects all heat from the system through what
component ? - ANSWER Condenser
Two popular desiccants used in adsorptive desiccant dryers are - ANSWER silica
gel and activated alumin
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