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WorksheetsQualification section (API 936)
Total questions: 15
Worksheet time: 14mins
What factor shall set the refractory shelf life requirements per API 936?
Temperature exposure
Moisture exposure
Time limits for material tests
Manufacturer’s experience
If manufacturer’s shelf life recommendations (e.g. as noted on the compliance datasheet)
are more stringent, which of the statements below are true?
Manufacturer’s restriction shall apply
API 936 four month rule always applies
API 936 three month rule applies
None of these are correct
Which statement is true regarding API 936 plastic refractory with a workability index found
to be below the manufacturer’s minimum required value?
Plastic refractories shall be subject to re-qualification or discarding
Plastic refractories shall be subject to re-qualification
Plastic refractories shall be subject to discarding
None of these are correct
Hydraulic bonded castable refractories shall be packaged in:
Heat-sealed plastic to assure vapor tight enclosure
Super sacks with vapor tight enclosures
Cardboard outside containers
Sealed, moisture-proof bags
Chemical setting refractories shall be packaged in:
Heat-sealed plastic to assure vapor tight enclosure
Super sacks with vapor tight enclosures
Cardboard outside containers
Sealed, moisture-proof bags
Quality Control testing shall follow ASTM procedures as modified by API 936 and shall
consist of all of the following except:
Density and cold crushing strength (CCS)
Workability index (This is applicable to plastics only)
Permanent linear change (PLC) and Abrasion loss (when applicable)
Other tests required by the owner as defined in the execution plan
Refractory shall be applied within what time limit from the initial qualification tests?
Within 2 months
Within 3 months
Within 4 months
None of these are correct
Refractory materials shall be stored at:
Room temp
40-100°F (5-38°C)
50-90°F (10-32°C)
60-80°F (15-27°C)
Regarding specimen preparation for tests, Specimens shall be dried and fired as required
by the testing procedure and Oven firing* requires what hold times at what temperature?
Heat 220°F/hr (104°C/hr) to 700°F max (370°C), 5 hr hold, Cool at 220°F/hr (104°C/hr) max
Heat 300°F/hr (170°C/hr) to 1500°F max (815°C), 5 hr hold, Cool at 300°F/hr (170°C/hr) max
Heat 300°F/hr (170°C/hr) to 1500°F max (815°C), 5 hr hold, Cool at 500°F/hr (280°C/hr) max
Heat 220°F/hr (104°C/hr) to 700°F max (370°C), 5 hr hold, Cool at 300°F/hr (170°C/hr) max
During material qualification, when a sample fails to meet specified requirements, it may:
Never be accepted
Retested once
Retested twice
None of these are correct
Pre-installation simulation of production work that is visually inspected, sampled, and
tested to verify that application equipment and personnel are capable of meeting specified
quality standards is:
As-Installed Testing
Applicator Qualification Testing
Material Qualification Testing
Production Qualification Testing
The testing of refractory materials SAMPLED FROM THE INSTALLATION to confirm that
they meet specified physical property standards is:
As-Installed Testing
Applicator Qualification Testing
Material Qualification Testing
Production Qualification Testing
Pre-installation testing of refractory materials in which the production lots of refractories
manufactured for a specific installation are sampled and tested to confirm that they meet
specified physical property requirements is called:
Applicator Qualification Testing
As-Installed Testing
Material Qualification Testing
Production Qualification Testing
Actual Refractory bag or container weight shall not deviate from marked weight by:
More than +/- 1%
More than +/- 2%
More than +/- 3%
More than +/- 4%
Bags or containers for cast, hand-packed or rammed mixes shall be marked with:
Product name/batch number
Date of manufacture and expiry
Contained refractory weight
Mixing instructions
