Calculate min. hydrotest pressure for piping with max. allowable working pressure (MAWP) of 200 psi.

• 260 psi

• 150 psi

• 300 psi

• 200 psi

Pipe support functions are:

• to keep the line straight

• to prevent piping from sagging

• helps absorb vibration

• provide more spacing for maintenance

Factors to consider when selecting pipe support:

• Weight of piping, insulation & contents
  

• Wind, snow and ice loading.
  

• Spans between supports
  

• Strength of equipment and supporting structures
  

Isolation can be performed with mechanical blinding devices such as:

• spacer

• spade

• spectacle blind

• blind flange

Routine works such as _________________ will not normally require isolation before carrying out the works.

• setting controllers

• taking pressure readings

• gas testing for confine space entry

• taking temperature readings

The highest level of isolation method from the following is:

• DBB

• double block valves

• DBB and spade

• Single block valve, bleed valve and spade

Isolation method with the highest overall cost would be:

• single block valve

• spade blinding

• removable spool

• DBB

Scope of work for mech. fitter in isolation work:

• bleeding using bleed valve

• operate DBB

• spectacle plate blinding

• spool removal

Consequences on personnel normally associated with fiberglass insulation works:

• eye irritation

• skin irritation

• respiratory irritation

• wet insulation

Protection for corrosion used for underground piping is normally accomplished by:

• rock wool insulation

• wrapping

• coating with epoxy or bitumen

• primer only