- All Exams Instant Download
Forms (types) of refractory
Forms (types) of refractoryA . Shaped B. Unshaped C. Refractory (ceramic) fibers D. All aboveView AnswerAnswer: D
Fused silica aggregate is used as a raw material in a castable providing
Fused silica aggregate is used as a raw material in a castable providingA . Low thermal conductivity B. Low thermal expansion C. Low thermal conductivity and low thermal expansion D. None of the aboveView AnswerAnswer: C
Refractories whose major constituent is lime, magnesia, or both and which may react chemically with acid refractories, acid slags, or acid fluxes at a high temperature is known as
Refractories whose major constituent is lime, magnesia, or both and which may react chemically with acid refractories, acid slags, or acid fluxes at a high temperature is known asA . Acid refractories B. Basic refractories C. Natural refractories D. None f the aboveView AnswerAnswer: B
Refractories means
Refractories meansA . Hard to fuse B. Hard to test C. Hart to set D. None of the aboveView AnswerAnswer: A
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:A . Refractoriness B. Pyrometric cone equivalent C. Refractoriness under load D. None of the aboveView AnswerAnswer: B
A group of impure magnesium silicate minerals that occur in a fiberous form is known as
A group of impure magnesium silicate minerals that occur in a fiberous form is known asA . Asbestos B. Mineral fibre C. Fused silica D. None of the aboveView AnswerAnswer: A
Castable, gunning mixes, ramming mixes, plastics, and mortars are
Castable, gunning mixes, ramming mixes, plastics, and mortars areA . Shaped refractory B. Unshaped refractory C. Refractory fiber D. All of the aboveView AnswerAnswer: B
The functions of refractories include resistance to other destructive influences such as abrasion, pressure, chemical attack, and or rapid changes in temperature is called.
The functions of refractories include resistance to other destructive influences such as abrasion, pressure, chemical attack, and or rapid changes in temperature is called.A . Primary function B. Secondary function C. Tertiary function D. None of the aboveView AnswerAnswer: B
The test specimen of castable refractory for cold crushing strength shall be
The test specimen of castable refractory for cold crushing strength shall beA . 2 in. (51mm) cubes B. Cylinders, 2 in. (51mm)in dia. by 2 in.(51 mm) height C. a or b D. none of the aboveView AnswerAnswer: C
A high alumina mineral usually consists of rounded concretionary grains embedded in clay-like mass and is believed to consist essentially of alumina trihydrate (Al2O3 H2O) and alumina hydrate (Al2O3 H2O) in varying proportions is called
A high alumina mineral usually consists of rounded concretionary grains embedded in clay-like mass and is believed to consist essentially of alumina trihydrate (Al2O3 H2O) and alumina hydrate (Al2O3 H2O) in varying proportions is calledA . kyanite B. bauxite C. fused alumina D. alusiteView AnswerAnswer: B
