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Question 1

Which of the following is the appropriate term for testing refractory that was sampled during project site installation in order to confirm that it meets specified physical property standards?

Options :

A : Hammer testing

B : Pre-qualification testing

C : As-installed testing

D : Visual testing

Answer: C

Question 2

When drying out a unit or vessel that has multiple refractories, schedules should be based on:

Options :

A : the refractory with the highest density in the dryout.

B : extending the hold times by one hour per additional refractory layer.

C : the refractory or lining system that has the longest duration requirement.

D : an average of heating rates and holding times for the refractories and thicknesses being dried out.

Answer: C

Question 3

The application of monolithic refractories by means of air placement guns is

Options :

A : gunning

B : placing

C : pouring

D : casting

Answer: A

Question 4

According to API 936, test specimens are required to be held at oven dry temperature for how many hours?

Options :

A : 1

B : 3

C : 5

D : 12

Answer: D

Question 5

Throughout a period of at least 24 hours, test specimens for air-setting, phosphate-bonded castable refractories are:

Options :

A : air cured, covered.

B : heat cured, uncovered.

C : air cured, uncovered.

D : heat cured, covered.

Answer: C