PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following statement is not true in case of catalytic reforming. High temperature results in loss of reformate yield High naphthenic stock require high space velocity Presence of water decrease the hydrocracking activity. None of above
2 For highly paraffine , crude oil, the characterization factor will be in range of 11.5-12.5 12.5-13.0 13.5-14.0 13.4-15.0
3 Petrol can be saved by Driving at a constant and moderate speed Ensuring correct type pressure Switching off the engine at traffic lights All of these
4 What is called black gold. Petroleum Coal Coal tar Natural gas
5 Bitumen is used in Electric generators Road surfacing Coal tar All of above
6 PCRA stand for Pollution control research association Petroleum conversation Research association Petroleum control research association All of above
7 CNG is stored under Power genertion Electric Generators Solvent All of above
8 Natural gas can be transported through Cylinders Pipes Barriers All of above
9 During sintering densification is not due to Atomic diffusion Surface diffusion Bulk diffusion Surface tenstion
10 Hot isostatic pressing is not a viable option if the chief criterion is Strength without gram growth Lost cost Zero porosity Make it hard
11 Most commercial glasses consist of Lime Soda Silica All
12 The following ceramic product is mostly used as pigment in paints. TiO2 SiO2 uo2 ZrO2
13 Not a major contributor of engineering ceramics SiC SiO2 Si3N4 BH3
14 Major ingredients of traditional ceramics Silica Clay Feldspar All
15 Not a Characteristic property of ceramic material High temperature stability High mechanical strength Low elongation Low hardness
16 The word 'ceramic' meant for. Soft material Hard material Burnt material Dry material
17 In Pakistan the total production of glass is over ________ tons per year. 800 8000 80,000 None of these
18 In Pakistan how many units are involved to the production of glass. 20 25 30 None of these
19 The main constituents of ___________ are boron oxide and silica. Pyrex glass Low silica glass Soda lime glass Super hard glass
20 ______ is used for Annealing Klin Batch Converter Oven
21 _______ is heat treatment cycle that prevents glass from harmful stress. Forming Annealing Batching None of these
22 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
23 In glass making the whole combination of ingredients is called a. Gangue Batch Mixture None of these
24 _________ is used as stablizer. CaO SiO2 NaCl None of these
25 Chemical compounds which are added to reduce to reactivity of glass are called. Formers Modifiers Stabilizers None of these
26 The principle former of almost all glasses is (SIO2)n (SiO3)n (SiO2) None of these
27 The substance that can form the glassy non-crystalline structure is called. Stabilizers Fluxes or modifiers Formers None of these
28 The number of Glass products now manufactured is. 25,000 75,000 50,000 All of these
29 Glass was first made by about________ 40 BC 400 BC 4000 BC 100 BC
30 In Glass of vitreous state solid the atoms are arranged in. Regular fashion Random fashion linear fashion All of these
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