Chemical Engineering MCQs

6108 MCQs (Page 264 of 611)

Attempt Chemical Engineering Quiz

For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?

A. The new surface created
B. The size reduction ratio
C. The change in volume due to crushing
D. None of these

Read more about this MCQ

In bag filters, filter fabrics are never made of__________________?

A. Metallic wire woven mesh
B. Polyester fibres
C. Cotton fibres
D. Nylon fibres

Read more about this MCQ

In closed circuit grinding as compared to open circuit grinding, the_________________?

A. Specific surface of product is more
B. Product has lesser size uniformity
C. Production rate at a given limiting size is lower
D. Operation is economical

Read more about this MCQ

Grizzlies are used for separating _____________ solids?

A. Coarse
B. Fine
C. Any size
D. None of these

Read more about this MCQ

A tube mill compared to a ball mill__________________?

A. Has a higher length/diameter ratio
B. Produces a coarser product
C. Has a higher diameter/length ratio
D. Uses much larger balls

Read more about this MCQ

Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?

A. Wet grinding in low viscous suspension
B. Wet grinding in high viscous suspension
C. Dry grinding of large particles (upto 1.25 cms)
D. Dry grinding of large particles in un-baffed mills

Read more about this MCQ

Use of baffles in agitators help in minimising the ______________ tendency?

A. Swirling
B. Vortexing
C. Both a. & b.
D. Neither a. nor b.

Read more about this MCQ

Ore concentration by jigging is based on the difference in the ______________ of the particles?

A. Specific gravities
B. Wettability
C. Shape
D. None of these

Read more about this MCQ

In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be ______________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume ?

A. More than
B. Less than
C. Same as
D. Data insufficient; can’t be predicted

Read more about this MCQ

The first order series reaction as shown in the bellow figure is conducted in a batch reactor. The initial concentrations of A, B and C (CA0, CB0, CC0 respectively) are all non-zero. The variation of CB with reaction time will not show a maximum, if___________________?

A. K2 cb0 > k1 ca0
B. K ca0 > k2.cb0
C. Cb0 > ca0
D. Ca0 > cb0

Read more about this MCQ

MCQs Menu

Past Papers

Archaeology & Tourism Department - 2019 Archaeology & Tourism Department - 2019 Assistant BOR Assistant Controller-Morning 23-11-2024 (2024)Assistant Director (HR and ADMIN) BS-17 (2025)Assistant Director ASF (BS-17) Batch 01 (05-08-2024) (2024)Assistant Director Fisheries (BS-17) (1-06-2025) (2025)Assistant PESSI Held on 19-10-2025 (2025)Assistant Sub Inspector BPS-11 (BATCH-1) 08-04-2025 (2025)Assistant Superintendent / Deputy Superintendent Jail (GK) (2025)Assistant) PPSC 25-08-2024 (2024)Bio Medical Engineer (Labour & Resource) Held on 10-08-2024) (2024)Chief Officer/Municipal Officer (Regulations) Local Government & Community Develop Chief Officer/Municipal Officer (Regulations) Local Government & Community Development (Held on 11-08-2024) (2024)Clubbed (27-04-2025) (2025)Clubbed Case 74 – Assistant (BS-16) Various Departments – 2024 (2024)Clubbed Case-76 (Evening) Held on 08-06-2024 (2024)Clubbed Case-85 (Morning) Held on 08-06-2024 (2024)Clubbed Case-91(Morning) Punjab Special Education Department (10-08-2024) (2024)Clubbed Case-97 (Evening) Held on 13-07-2024 (2024)Clubbed Case-Various Post(Labour Inspector/Officer Clubbes Case 98 – Various Posts -2024 (2024)Concept Academy Notes Data Entry Operator (BS-12) (31-05-2025) (2025)Educator (BS-16) Punjab Special Education Held on 13-07-2024 (2024)FIA - Assistant - FIA - 2018 FIA - Sub Inspector (Investigation) - FIA - 2018 FIA ASI Test By VU on 13-12-2021 FIA Assistant paper 14-12-2021 FIA Past Paper Assistant/ASI/Inspector FIA-Assistant / Inspector / ASI / UDC / LDC / Constable FIA-Assistant Director / Inspector FIA-Assistant Director / Inspector / Sub-Inspector / ASI / Clerk FIA-Assistant/SI/ASI/UDC/LDC/Constable FIA-FIA (All Posts) - Act Knowledge FIA-Stenotypist FIA-Sub Inspector INSTRUCTOR/LECTURER (MALE) ENGLISH (BS-17) (2024)Inspector (BS-16) Tourist Services (DTS)Inspector Cooperative (Cooperative Department) Held on 10-08-2024 (2024)Junior Clerk (BS-11) (1-06-2025) (2025)Junior Clerk (Morning) Held on 14.12.2025 (2025)Junior Clerk BOR Held on 20.12.2025 (2025)Lecturer Punjabi (BS-17) (Special Education Department) Held on 13-07-2024 (2024)Lecturer Urdu (Special Education Department) Held on 10-08-2024 (2024)PMS Ministerial (13-04-2025) (2025)PMS Ministerial Qouta 2025 PPSC - ASSISTANT FOOD CONTROLLER (BS 15) 09J17J2022 - FOOD DEPARTMENT - 2023 PPSC - ACCOUNTS OFFICER (BS 16) - FINANCE DEPARTMENT - 2011 PPSC - ASI - Punjab Police (Service Quota) - 2019 PPSC - ASSISTANT (BPS 14) - PPSC - 2015 PPSC - ASSISTANT (BPS 16) - CLUBBED CASES - 2024 PPSC - ASSISTANT (BPS 16) - PLANNING & DEVELOPMENT DEPARTMENT - 2016 PPSC - ASSISTANT (BPS 16) - PPSC - 2016 PPSC - ASSISTANT AUDIT & ACCOUNTS (BPS 14) - PUNJAB FINANCE DEPARTMENT - 2011 PPSC - Accountant - Local Government & Community Development - 2020 PPSC - Assistant (BS 16) - (PESS) Labour & Human Resource Department - 2020 PPSC - Assistant (BS 16) - Board of Revenue - 2022 PPSC - Assistant (BS 16) - Chief Minister Office Overseas Pakistanis -PPSC - Assistant (BS 16) - Livestock & Dairy Development - 2020 PPSC - Assistant (BS 16) - PPSC - 0000 PPSC - Assistant (BS 16) - PPSC - 0001 PPSC - Assistant (BS 16) - Punjab Public Service Commission (PPSC) - 0000 PPSC - Assistant - Agricultural Department - 2018 PPSC - Assistant - Agriculture Department - 2020 PPSC - Assistant - Clubbed Cases Various Departments - 2024 PPSC - Assistant - Disaster Management Department (Board of Revenue) - 2022 PPSC - Assistant - Housing Urban Development & Public Health Engineering Department (Rawalpindi Region) - 2021 PPSC - Assistant - Labour and Human Resource - 2019 PPSC - Assistant - Lahore High Court (LHC) - 2019 PPSC - Assistant - Planning & Development Punjab - 2019 PPSC - Assistant - Population Welfare Department - 2019 PPSC - Assistant - Provincial Disaster Management Authority (BOR) - 2021 PPSC - Assistant - Punjab Police Department - 2020 PPSC - Assistant - S&GAD Punjab - 0000 PPSC - Assistant - Services and General Administration Department (S&GAD) - 0000 PPSC - Assistant - Zakat & Usher Department - 2021 PPSC - Assistant BS 16 - (Clubbed Cases) - 2023 PPSC - Assistant BS 16 - (Clubbed Cases) - 2023 PPSC - Assistant Director (Accounts) / Lecturer Psychology 14 Jul 2024 - Higher Education Department & Others - 2024 PPSC - Assistant Director (Accounts) / Lecturer Psychology 14 Jul 2024 - Higher Education Department & Others - 2024 PPSC - Assistant Director (BS 17) - Local Government Punjab - 2020 PPSC - Assistant Director (BS 17) - Population Welfare Department - 2020 PPSC - Assistant Director - Labour & Human Resource Department Punjab - 2019 PPSC - Assistant Director - Local Govt & Community Development - 2018 PPSC - Assistant Director - Planning & Development Department (P&D) - 2019 PPSC - Assistant Director - Punjab Employees Social Security Institution (PESSI) - 2019 PPSC - Assistant Protocol Officer - Directorate General Protocol - 0000 PPSC - Assistant Sub Inspector (ASI) - Anti Corruption Department - 2020 PPSC - Assistants / Head Clerk (BS 16) - Local Government - 2020 PPSC - Caretaker (BS 14)- Lahore High Court - 2019 PPSC - Caretaker- Lahore High Court (LHC) - 2019 PPSC - Chief Officer / Municipal Officer (BS 16) (Regulations) 11/08/2024 (Morning) - Local Government & Community Development Department - 2024 PPSC - Chief Officer / Municipal Officer (BS 16) (Regulations) 11/08/2024 (Morning) - Local Government & Community Development Department - 2024 PPSC - Corporal - Counter Terrorism Department Punjab (BS 11) - 2024 PPSC - DATA ENTRY OPERATOR (DEO) - PUNJAB POLICE DEPARTMENT - 2015 PPSC - DATA ENTRY OPERATORS (DEO) - PUNJAB POLICE DEPARTMENT - 2015 PPSC - Data Entry Operator (DEO) - Punjab Police - 2020 PPSC - Deputy Accountant (BPS 14) - Punjab Treasuries Establishment under the Finance Department - 2012 PPSC - Deputy Accountant (Evening) - Finance Department - 2019 PPSC - Deputy Accountant (Evening) - Finance Department - 2019 PPSC - Deputy Accountant (Morning) - Finance Department - 2019 PPSC - Deputy Accountant (Morning) - Finance Department - 2019 PPSC - Deputy Accountant - Finance Department - 2019 PPSC - Divisional Coach - Youth Affairs PPSC - EDUCATOR (BS 16) - PUNJAB SPECIAL EDUCATION DEPARTMENT - 2015 PPSC - ESE General (Afternoon) - Labour & Human Resource Department - 2019 PPSC - ESE General (Evening) - Labour & Human Resource Department - 2019 PPSC - ESE General (Evening) - Labour & Human Resource Department - 2019 PPSC - Educator (BS 16) - Education Department Punjab - 2024 PPSC - Elementary School Educator (ESE) General - Labour & Human Resource Department - 2019 PPSC - FOOD GRAIN SUPERVISOR (BS 09) - FOOD DEPARTMENT PUNJAB - 2023 PPSC - FOOD GRAIN SUPERVISOR (BS 09) Paper 2 - FOOD DEPARTMENT - 2023 PPSC - FOOD GRAINS INSPECTOR (BS 12) 18J26J2022 (30/04/2023) - FOOD DEPARTMENT - 2023 PPSC - FOOD GRAINS INSPECTOR (BS 12) 18J26J2022 (30/04/2023) - FOOD DEPARTMENT - 2023 PPSC - Field Assistant - Agriculture Department - 2018 PPSC - Field Assistant Crop Reporter - Agriculture Department - 2018 PPSC - HEALTH EDUCATOR (BS 17) - PUNJAB DEPARTMENT - 2014 PPSC - INSTRUCTOR (BS 17) - Management and Professional Development Department - 0000 PPSC - Inspector (BS 16) - Cooperative Societies - 2024 PPSC - Inspector (BS 16) - Youth Affairs PPSC - Inspector - Anti Corruption Establishment - 2020 PPSC - Inspector - Cooperative Societies Department Punjab - 2019 PPSC - Inspector - Excise & Taxation (D.G Khan Region) - 0000 PPSC - Inspector - Excise & Taxation (DG Khan Region) -PPSC - Inspector - Excise & Taxation (Lahore Region) -PPSC - Inspector - Excise & Taxation Additional Directorate - 0000 PPSC - Inspector - Excise & Taxation Department - 2018 PPSC - Inspector - Excise & Taxation Region (LAHORE) - 0000 PPSC - JUNIOR CLERK (BPS 07) - PUNJAB PUBLIC SERVICE COMMISSION - 0000 PPSC - JUNIOR CLERK (BPS 11) - S&GAD - 2016 PPSC - JUNIOR CLERK (BPS 11) - S&GAD - 2018 PPSC - JUNIOR CLERK (BPS 11) - S&GAD - 2016 PPSC - Junior Clerk (43J2022) - Board of Revenue - 2023 PPSC - Junior Clerk (BS 11) - Anti Corruption - 2020 PPSC - Junior Clerk (BS 11) - Anti Corruption Establishment Department - 2020 PPSC - Junior Clerk - Labour & Human Resource Department - 2019 PPSC - Junior Clerk - Punjab Police Department - 2018 PPSC - Junior Clerk - Punjab Police Department - 2022 PPSC - Junior Clerk - Punjab Public Service Commission (PPSC) - 2019 PPSC - Junior Clerk - Revenue Department - 2019 PPSC - Junior Clerk - S&GAD Punjab - 2018 PPSC - Junior Clerk - S&GAD Punjab - 2019 PPSC - Junior Clerk - Services and General Administration Department Punjab (S&GAD) - 2019 PPSC - Labour Inspector (BS 14) - Labour & Human Resource Department - 2019 PPSC - Labour Inspector - Labour & Human Resource Department - 2020 PPSC - Labour Inspector - Labour and Human Resource Department - 2018 PPSC - Labour Officer - Labour & Human Resource Department - 2020 PPSC - Labour Officer - Labour and Human Resource Department - 2018 PPSC - Lecturer Computer Science IT (BS 17) - Higher Education Department Punjab - 2017 PPSC - Lecturer Computer Science IT - Higher Education Department Punjab - 2017 PPSC - Lecturer English (Male) 9 Jun 2024 - Higher Education Department - 2024 PPSC - Lecturer History (Male) - Higher Education Department - 2021 PPSC - Manager (20M2020) - AUQAF - 2020 PPSC - Monitoring & Evaluation Assistant / Field Coordinator - Punjab Employees Social Security Institution - 2019 PPSC - NAIB TEHSILDAR (ENGLISH) (BS 14) - REVENUE DEPARTMENT PUNJAB - 2022 PPSC - NAIB TEHSILDAR (GENERAL KNOWLEDGE) (BS 14) - REVENUE DEPARTMENT PUNJAB - 2022 PPSC - PMS - PPSC - 2024 PPSC - PMS GK - 2020 MCQs PPSC - PMS General Knowledge - S&GAD - 2019 PPSC - PMS General Knowledge - S&GAD - 2020 PPSC - PMS General Knowledge - S&GAD - 2022 PPSC - PMS General Knowledge - S&GAD - 2019 PPSC - PMS General Knowledge - S&GAD - 2022 PPSC - Past Papers - Most Repeated PPSC - Personal Assistant & Assistant (BPS 16) - S&GAD - 2020 PPSC - Personal Staff Officer (BS 17) - S&GAD - 2020 PPSC - Planning Officer /Deputy District Officer (Planning) - Planning & Development - 2014 PPSC - Provincial Management Service (PMS) - S&GAD - 2018 PPSC - Provincial Management Service PMS (Ministerial Quota) - S&GAD - 2019 PPSC - Service Center Official - Punjab Land Record Authority - 2018 PPSC - Service Center Officials (BPS 11) - Punjab Land Record Authority - 2020 PPSC - Social Security Officer – (PESSI) Labour and Human Resource Department - 2018 PPSC - Sub Inspector (BS-14) - Transport - 2019 PPSC - Sub Inspector (Open Merit) - Punjab Police - 2022 PPSC - Sub Inspector (Service Quota) - Punjab Police - 2019 PPSC - Sub Inspector - Cooperative Societies Punjab - 2018 PPSC - Sub Inspector - Punjab Police - 2019 PPSC - Tehsildar Consolidation Officer/Hill Torrent Officer /Reader to members Board of Revenue (BS 16) - Revenue Department - 2020 PPSC - ZILADAR (14 19G2020) - Irrigation Department - 2020 PPSC - ZILADAR (Research/DLR Zone) 14.20G2020 - Irrigation Department - 2020 Punjab held on 13-07-2024 (2024)SPSC - Assistant Director (BS 17) - Education Department Sindh - 2023 Sports Sports Archaeology & Tourism Department - 2019 Sub Divisional Officer (2024)Sub Inspector (BS-14) Held on 19-10-2025 (2025)System Administrator 2026