카테고리 API

NO.39 Who is responsible for ensuring that the material and applicator qualification test results are fully documented?

NO.40 Hydration is the process that causes refractory concrete to:

NO.41 If application of hydraulic bonded or chemical setting refractory is interrupted, the refractory lining shall be:

NO.42 When drying out a unit or vessel that has multiple refractories, schedules should be based on:

NO.43 Which party or individual is responsible for submitting a dryout procedure for a new lining?

NO.44 The physical attributes testing of manufactured bricks during pre-shipment testing shall require a minimum Acceptable Quality Limit (AQL) of:

NO.45 Forms (types) of refractory

NO.46 Which of the following statements regarding curing of hydraulic bonded castables is true?

NO.47 A group of rock minerals having nearly perfect cleavage in one direction and consisting of thin elastic plates and the most common varieties are muscovite and biotite is called

NO.48 According to API 936, test specimens are required to be held at oven dry temperature for how many hours?

NO.49 The vessel in which the cracking reaction occurs or is completed, and in which the product gases are separated from coke and/or catalyst particulate, is the:

NO.50 Before refractory installations, all surfaces to be lined shall be cleaned to meet:

NO.51 1 solid black is the color of the stripe for the alloy material

NO.52 Each sample tested in accordance with ASTM C181 for workability index shall consist of how many specimens?

NO.53 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?

NO.54 Cold wall refractory lined components shall be dried out by heating from:

NO.55 A typical example of hexalt anchor is

NO.56 Cristobalite is an important constituent of

NO.57 Refractories containing a substantial amount of silica which is reactive with basic refractories, basic slags, or basic fluxes at high temperatures are known as

NO.58 When is metal fiber reinforcement used in castable refractory?

NO.59 The increase in linear dimensions and volume which occurs when materials are heated and which is counterbalanced by contraction of equal amounts when the materials are cooled.

NO.60 All the samples for the CCs test must be dried at 220 to 230?C (105 to 110?C) for

NO.61 The color of stripe for Inconel 600 alloy material of metallic anchor is