Online Access Free API-936 Practice Test

Test results received from cast sample mock-ups will serve to qualify the:

Correct Answer:

Explanation:
mixing time
mix water levels
installation procedures
According to API Std 936 and supporting guidance from TR 980, cast sample mock-ups are used during pre-installation trials to ensure the suitability and repeatability of installation variables such as mixing procedures and water content. These mock-ups are critical to confirm that the material can be properly installed under anticipated field conditions.
From API 936:
"Mock-up cast sample trials shall be used to demonstrate the adequacy of the mixing time, water addition (mix water levels), and installation procedures prior to production installation."
- API Std 936, Section 6.3.2
This ensures that full-scale application performance is achievable using the approved methods and materials. However:
The "quality of the inspection equipment" and
"fabricator of the mock-up"
are not part of the qualification objectives defined for cast sample testing.
Correct selections:
mixing time
mix water levels
installation procedures

If application of hydraulic bonded or chemical setting refractory is interrupted, the refractory lining shall be:

• A.cut back to the shell in a straight line.
• B.cut back within 1 hour.
• C.cut back within 30 minutes.
• D.immediately cut back to the shell between anchors.

A pigment shall be used in the curing compound in order to:

• A.prevent ultraviolet light damage.
• B.help the lining retain heat.
• C.help the lining retain moisture.
• D.indicate full coverage.

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

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

When is metal fiber reinforcement used in castable refractory?

• A.Only when specified by the owner
• B.Only when added in the field
• C.Only when extra strength is required
• D.For all monolithic hot face castable refractory materials