A. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
B. Portland cement is made employing wet process
C. Gypsum is added to Portland cement to lengthen its setting time
D. None of these
Related Mcqs:
- Pick out the wrong statement ?
A. Low intensity explosives are also called propellants, whereas high intensity explosive are
called detonators
B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
C. Lead azide is a popular military explosive
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human
being - Pick out the wrong statement?
A. Azoic dyes are mostly applied on cotton fabrics
B. Basic dyes (e.g. amino derivatives) are applied mostly to paper
C. Mordant dyes are applied mainly to wools
D. None of these - Pick out the wrong statement ?
A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%
B. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%
C. 75% oleum can be produced by distillation of 20% oleum
D. Contact process of sulphuric acid manufacture uses nickel as the catalyst - Pick out the wrong statement ?
A. Strongly caking coal should not be used in the Lurgi gasifier
B. Acetylene gas cannot be used for illumination purpose
C. Water gas is called blue gas because of the color of the flame, when it is burnt
D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels - Pick out the wrong statement?
A. Hard glass which is used for making laboratory glass wares is a mixture of sodium
borosilicate and aluminium borosilicate
B. Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or
arsenic oxide
C. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2
D. Red color is imparted to glass by addition of arsenic oxide - Pick out the wrong statement. Iodine value of an oil or fat is________________?
A. The number of grams of iodine taken up by 100 gm of oil or fat
B. A measure of its unsaturation
C. Helpful in findings its adulteration & its suitability for making soap
D. Independent of the type of oil, whether it is drying or non-drying - Pick out the wrong statement ?
A. Kraft method of pulp manufacture can process all types of fibrous raw materials
B. Digestion time for bagasse is less than that for wood base materials
C. Both temperature and pressure in the digestor is less in case of the sulphite method as
compared to that in the sulphate method
D. None of these - Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have___________________?
A. High electrical insulation properties
B. Sharp melting points
C. Low co-efficient of thermal expansion
D. Compressive strength much greater than their tensile strengths - Pick out the wrong statement ?
A. Pasteurisation of milk involves moderate heating followed by cooling
B. Bakeries and breweries make use of yeasts
C. Enzyme is a complex nitrogenous compound
D. Oils and fats are alkaloids - Pick out the wrong statement ?
A. High early strength cement are made from materials having high silica to lime ratio
B. The function of gypsum in cement is to enhance its initial setting rate
C. Acid resistant cements are known as silicate cement
D. Major component of greyish Portland cement is tricalcium silicate
