Solved question paper for CHEM May-2019 (DIPLOMA 1st-2nd)

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Chemistry May-2019

PSBTE • DIPLOMA • Information Technology • 1st-2nd • May-2019

CHEM (chemistry) for Punjab State Board of Technical Education Diploma in Engineering 1st-2nd semester students is collected here as subject-wise previous year question papers and old papers for quick revision. Students can use these PYQ papers to understand the exam pattern, check repeated questions, and prepare important topics in a simple, semester-wise way. This page helps you find and download diploma question paper PDFs for CHEM and review common unit-wise questions before exams. BRpaper is not the official website of the Punjab State Board of Technical Education, and the papers here are meant for study reference and exam preparation only.

Question papers (year-wise) Solutions

Solved Questions

Solved

Sulphide ores are concentrated by ____________ process.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Sulphide ores are concentrated by _______process.

May 2016
Sulphide ores are concentrated by ______________process.

May 2015 Sulphide ores are concentrated by _________.
_________ is an ore of aluminium.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Siliconising is the process of coating base metal by _________.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Corrosion of iron is _______ in moist air than in dry air.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Full form of LPG is _________.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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A good fuel should have _____ moisture content.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2019 A good fuel has high moisture content.

May 2015 A good fuel has higher moisture content.

Dec 2015 A good fuel has low moisture content.
The viscosity of grease is _____ than of olive oil.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Dec 2017
The velocity of grease is __________ than of olive oil.
Optical glass is used for making _______.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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A good refractory material should have ______ porosity.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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May 2015 A good refractories should have __________ porosity.
__________ is an example of elastomer.

Fill in the Blanks 1 Marks May-2019 • PSBTE DIPLOMA

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Fibers are weaker than elastomers.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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Dec 2017
Fibres are weaker than elastomers.

May 2015 Fibres are weaker than elastomers.
Graphite is used as solid lubricant.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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Anthracite coal has highest calorific value.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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Annealing is the process to make steel soft in nature.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Annealing of steel causes softening of steel.
Noble gases cause corrosion.

True / False 1 Marks May-2019 • PSBTE DIPLOMA

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May 2018
Noble gases undergo corrosion.
Distinguish between roasting and calcinations.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2020 Differentiate between roasting and calcinations.

May 2019 Differentiate between roasting and calcination.

Explain electromagnetic separation process for concentration of ores.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2021 Explain electromagnetic separation for concentration of ores.

Dec 2016
Explain electromagnetic separation process for the concentration of ores?
What is an alloy? What are ferrous and non-ferrous alloys?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2020 What are ferrous and non-ferrous alloys? Give examples.
Give one use of Nichrome.

Short Answer 1 Marks May-2019 • PSBTE DIPLOMA

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Give one use of Alnico.

Short Answer 1 Marks May-2019 • PSBTE DIPLOMA

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Give one use of Nickel steel.

Short Answer 1 Marks May-2019 • PSBTE DIPLOMA

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What do you understand by corrosion?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2021 Give a detail account of factors influencing the rate of corrosion.

May 2019 What are the factors that influence the rate of corrosion?

May 2017
What is the cause of corrosion?

May 2016
What are the factors which influence the rate of corrosion?

May 2016
What are the causes and disadvantages of boiles corrosion?

May 2015 What are the factors which influence the rate of corrosion?

Dec 2015 What is the cause of corrosion?
Rusting of iron is quicker in sea water than in ordinary water. Explain.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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What is power alcohol?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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Dec 2011 What is power alcohol?

What are characteristics of a good fuel?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2020 What are the characteristics of a good fuel?

May 2019 What are the characteristics of a good fuel?

Dec 2018 What are the characteristics of a good fuel?

Dec 2018 What are the characteristics of a good fuel?

Dec 2017
What are fuels? Give the characteristics of good fuel.

Dec 2016
What is fuel? What are the characteristic of good fuel?

Dec 2015 What are the characteristics of a good fuel?

Dec 2011 What are the characteristics of a good fuel?
What is calorific value of a fuel? Name the apparatus used to measure calorific value.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2021 Define calorific value of a fuel? What are the units of calorific value?

Dec 2018 Define calorific value of a fuel.

May 2015 Explain calorific value of fuel.
What are cutting fluids?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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What are refractories?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Give detailed account of three main types of refractories.

May 2018
Define Refractories? How will you classify Refractories?

Dec 2018 What are refractories?

Dec 2018 What are refractories? Explain its types with examples.

Dec 2015 What are refractories?

Dec 2015 Explain the types of refractories.

Give the advantages of varnish.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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What are natural and synthetic polymers? Give one example of each.

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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What is vulcanization of rubber?

Short Answer 3 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Define vulcanization of rubber.

May 2015 Explain vulcanization of rubber.
Explain froth floatation process for concentration of sulphide ores.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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Define: Mineral, Ore, Metallurgy, Gangue, Flux.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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Dec 2018 Define: metallurgy, mineral, ore, gangue, and flux.

May 2016
Define the terms gangue, flux, slag, ore and mineral.
Distinguish between thermoplastics and thermosetting plastics.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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May 2019 Differentiate between thermoplastics and thermosetting plastics.

Dec 2018 What is the difference between thermoplastic and thermosetting polymers?

Dec 2018 What is the difference between thermoplastic and thermosetting polymers?

May 2017
Differentiate between thermoplastics and thermosetting plastics.

Dec 2017
Difference between thermoplastic and thermosetting plastics?

May 2016
Differentiate between thermoplastics and thermosetting plastics.

Dec 2016
Differentiate between thermoplastic and thermosetting plastic with example?

May 2015 Differentiate between thermoplastics and thermosetting plastics with example.

Dec 2011 Differentiate between thermoplastics and thermosetting plastics.
What are fuels? What are the advantages of gaseous fuels?

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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May 2021 What are the advantages of gaseous fuels over solid and liquid fuels?

May 2018
What are the advantages of gaseous fuels?

Dec 2018 What are the advantages of gaseous fuels?

Dec 2018 What are the advantages of gaseous fuels?

May 2015 Explain advantages of gaseous fuel over solid fuels.
What are the functions of a lubricant?

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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May 2021 What are the characteristics of a good lubricant?

May 2021
What are the functions of a lubricant?

May 2020 What are the functions of lubricants?

May 2019 What are the functions of a lubricant?

Dec 2018 What are the characteristics of a good lubricant?

Dec 2018 What are the characteristics of a good lubricant?

Dec 2017
What are functions of lubricants?

Dec 2017
What are lubricants? How are they classified?

Dec 2016
Define the term lubricant? What are the function of lubricant?

May 2015 What are the characteristics of a good lubricant?

May 2015 What are lubricants?

Dec 2015 What are the functions of lubricants?

What are the characteristics of a good paint?

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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May 2016
What are the characteristics of a good paint?

May 2015 What is paint? State main characteristics of a good paint.
What is varnish? What are its constituents?

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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May 2019 What is varnish?
Give uses of soda-lime glass.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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Dec 2018 Give one use of soda lime glass.

Dec 2018 Give one use of soda lime glass.
Give uses of borosilicate glass.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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Dec 2018 Give one use of borosilicate glass.

Dec 2018 Give one use of borosilicate glass.

Explain homopolymers and co-polymers with examples.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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Dec 2015 What do you understand by homopolymers and copolymers?

Dec 2011 Define homopolymer and copolymer with suitable explain.
Write brief note on caustic embrittlement.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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Dec 2015 Explain caustic embrittlement.
Write brief note on galvanization.

Long Answer 5 Marks May-2019 • PSBTE DIPLOMA

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May 2021 What is galvanization of iron? Explain.

May 2021
What is galvanization?

May 2020 What is Galvanization? How it is done?

May 2019 What is galvanization?

Dec 2018 Define the term galvanization.

Dec 2018 Define the term galvanization.

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Frequently Asked Questions

Answers about this subject, solved papers, and preparation.

Updated regularly

01 Where can I find CHEM previous year question papers for PSBTE Diploma?

You can use this CHEM subject page to find subject-wise previous year question papers for the PSBTE Diploma in Engineering 1st-2nd semester.

02 Can I download CHEM diploma question paper PDF from this page?

This page is meant to help students locate CHEM question paper PDFs and old papers for study and revision.

03 Are solved CHEM question papers available here?

Students often search for solved papers, but this page is mainly for previous year question papers and exam preparation material.

04 How do CHEM old papers help in exam preparation?

Old CHEM papers help you understand the exam pattern, spot repeated questions, and revise important units before the exam.

05 Is BRpaper the official website of Punjab State Board of Technical Education?

No. BRpaper is not the official website of Punjab State Board of Technical Education; it is a study reference page for question papers.

Solved question paper for CHEM May-2019 (DIPLOMA 1st-2nd)

Chemistry May-2019

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