QUESTIONS AND ANSWERS ALL
CORRECT
When they signal person gives the dog everything Signal, the operator is expected to -
Answer-Make no machine movement
If it is apparent that the crane operator has misunderstood a hand signal, the signal
person should - Answer-signal the operator to stop
One hand it's a no that is giving with a fist in front of the body and the thumb pointing
towards the signaler's body means - Answer-Extend the boom
A ______ is used to keep the load under control - Answer-Tag line
Once the size of the gasket or O-ring has been determined _____ factors must be
considered before choosing a gasket or O-ring - Answer-Compatibility
The gasket that is made of stainless steel with a graphite insert is the ______ gasket -
Answer-Spiral wound
Natural rubber has limited chemical resistance to - Answer-Petroleum products
The gasket material that is not recommended for water service and has poor chemical
resistance is - Answer-Neoprene
Which of the following substances would be comfortable with a nitrile gasket - Answer-
Alcohol
RTJ gaskets are used in ______ applications - Answer-High pressure
The radius of a bolt circle is equal to - Answer-Half the diameter
And gasket making bluing ink is used to - Answer-Transfer the flange impression to the
gasket material
When tightening the bolts on a circular multi bolt flange, you should start at 12o'clock
and proceed clockwise around the flange - Answer-False
, Graphite packing should not be used for applications were _______ is present -
Answer-Oxygen
TFE/synthetic fiber packing is used in - Answer-Caustic chemical applications
The choice of piping material is critical for chemical assistance because - Answer-Many
materials being transported will attack the piping system
Acid piping systems are more vulnerable to freezing at lower concentrations - Answer-
Fales
Utility air systems provide pressure between ________ PSig - Answer-50 and 125
Steam used in household heating usually at less than ______ psi - Answer-15
Staying with a pressure greater than 200 psi is called - Answer-Super heated
Water that is safe to drink is called - Answer-Potable
Dangerous material popping is identified by the color - Answer-Yellow
Green pipe is in class - Answer-S
Which of the following is not an excepted response to thermal expansion - Answer-
Insulation
Insulation material for popping where the temperature could be as high as 1200°F or as
low as -150°F would be - Answer-Rock cork
When the plug Valve is pushed away from the seat, this results in - Answer-Reverse
pressure
Which part of the valve received the most wear and tear - Answer-Stem
When installing a thread valve, you are most often lubricate the - Answer-Threads of the
pip
A gate valve offer is very little resistance to flow went open, so it produces very little
_______ - Answer-Pressure drop
Gate valve should not be used to ______ - Answer-Throttle flow
Enough gate valve is likely to be used in which of the following applications - Answer-
Slurry or waste