Online Access Free API-936 Practice Test

Which of the following is the term for aggregate and/or cement that bounces away from a surface against which refractory is being projected by gunning?

• A.Slurry
• B.Overspray
• C.Rebound
• D.Trimmings

Which of the following conditions must be met for test results from trial mixes of low cement castables to be accepted for qualification?

• A.Specimens must be fired at 1500°F (815°C) and held for a minimum of 3 hours.
• B.The water content must not vary more than ±1.0% from that recommended by the manufacturer.
• C.Bulk density and CCS must exceed average values published in ASTM C401.
• D.The drying process must be conducted at 220°F (104°C) for at least 48 hours before firing.

In the absence of owner specification, which party or individual sets the temperature limits for refractory and mix water?

• A.Inspector
• B.Contractor
• C.Independent refractory laboratory
• D.Manufacturer

Which factors must be the same when retesting a sample that fails to meet specification?

Correct Answer:

Explanation:
Pallet
Batch
Testing Procedure
Sample
When a sample fails to meet the required specifications in accordance with API Std 936, any retesting must maintain strict consistency with the original conditions to ensure validity and comparability of results.
API 936 states:
"If a sample fails to meet any requirement, resampling shall be permitted. However, retesting shall be performed using specimens from the same batch, pallet, and sample as the original test. The same testing procedure must be used."
- API Std 936, Section 6.2.3
Explanation of Matching Terms:
Pallet: To ensure material consistency.
Batch: Revalidates results without introducing variability from a new production lot.
Testing Procedure: Methodology must not change to avoid skewed comparison.
Sample: Must be the original sample to confirm initial findings.
Therefore, all of these factors must remain the same. The only item in your provided list that is not required to match is "Inspection methods" - it is not part of the retesting condition clause.

The best definition for creep is:

• A.shrinkage at high temperatures.
• B.cracking caused by thermal shock.
• C.an increase in expansion at high temperatures.
• D.deformation due to continuous load over time.