PPSC Chemistry Part VI Applied/Industrial Chemistry Online Test With Answers

image
image
image

PPSC Chemistry Part VI Applied/Industrial Chemistry Online Test

Sr. # Questions Answers Choice
1 Not a Characteristic property of ceramic material High temperature stability High mechanical strength Low elongation Low hardness
2 The word 'ceramic' meant for. Soft material Hard material Burnt material Dry material
3 In Pakistan the total production of glass is over ________ tons per year. 800 8000 80,000 None of these
4 In Pakistan how many units are involved to the production of glass. 20 25 30 None of these
5 The main constituents of ___________ are boron oxide and silica. Pyrex glass Low silica glass Soda lime glass Super hard glass
6 ______ is used for Annealing Klin Batch Converter Oven
7 _______ is heat treatment cycle that prevents glass from harmful stress. Forming Annealing Batching None of these
8 The melting of nearly all glass is done in a continuous tank furnace. which operates steadily over periods of up to. a day a month a year None of these
9 In glass making the whole combination of ingredients is called a. Gangue Batch Mixture None of these
10 _________ is used as stablizer. CaO SiO2 NaCl None of these
11 Chemical compounds which are added to reduce to reactivity of glass are called. Formers Modifiers Stabilizers None of these
12 The principle former of almost all glasses is (SIO2)n (SiO3)n (SiO2) None of these
13 The substance that can form the glassy non-crystalline structure is called. Stabilizers Fluxes or modifiers Formers None of these
14 The number of Glass products now manufactured is. 25,000 75,000 50,000 All of these
15 Glass was first made by about________ 40 BC 400 BC 4000 BC 100 BC
16 In Glass of vitreous state solid the atoms are arranged in. Regular fashion Random fashion linear fashion All of these
17 Proper proportioning of concrete, ensures Resistance to water Desired durability Water tightens of the structure. All
18 To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temeperature between 1100 <sup>o</sup> and 1200 <sup>o</sup>C 1200 <sup>o</sup> and 1300 <sup>o</sup>C 1400 <sup>o</sup> and 1500 <sup>o</sup>C 1900<sup>o</sup> and 2000 <sup>o</sup>C
19 While compacting the concrete by a mechanical vibrator, the slump should not exceed. 2.5 cm 10 cm 3.1 cm 5.0 cm
20 Which of the following is raw material not present on the cement. Lime stone Gypsum Red lead Blast furnace slag
Download This Set

Is this page helpful?

×