Engineer's Day Quiz - 2020

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| By Sangeeth Balan
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Sangeeth Balan
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Quizzes Created: 1 | Total Attempts: 269
Questions: 45 | Attempts: 271

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Engineers Day Quiz - 2020 - Quiz

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Questions and Answers
  • 1. 

    Which Railway Station is to be renamed after Siddharoodha Swami?

    • A.

      Hazrat Nizammudin

    • B.

      Ambala

    • C.

      Hubballi

    • D.

      Chennai

    Correct Answer
    C. Hubballi
    Explanation
    The railway station that is going to be renamed after Siddharoodha Swami is Hubballi.

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  • 2. 

    Who has launched a dispute redressal mechanism named "SAROD-Ports" ?

    • A.

      Ramesh Pokhriyal

    • B.

      Piyush Goyal

    • C.

      Mansukh Mandaviya

    • D.

      Narendra Singh Tomar

    Correct Answer
    C. Mansukh Mandaviya
    Explanation
    Mansukh Mandaviya has launched a dispute redressal mechanism named "SAROD-Ports".

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  • 3. 

    Who inaugurated Doorstep Banking Services by PSBs?

    • A.

      Amit Shah

    • B.

      Nirmala Sitharaman

    • C.

      Narendra Modi

    • D.

      Piyush Goyal

    Correct Answer
    B. Nirmala Sitharaman
    Explanation
    Nirmala Sitharaman inaugurated Doorstep Banking Services by PSBs. This suggests that she was responsible for launching this initiative.

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  • 4. 

    LinkedIn partnered with which organisation to provide digital skills training for youth?

    • A.

      CBSE

    • B.

      NSDC

    • C.

      E-skill

    • D.

      None of these

    Correct Answer
    B. NSDC
    Explanation
    LinkedIn partnered with NSDC (National Skill Development Corporation) to provide digital skills training for youth.

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  • 5. 

    Which organisation launches Aatmanirbhar Bharat ARISE-ANIC initiative?

    • A.

      A) AIM

    • B.

      B) President

    • C.

      C) NITI Aayog

    • D.

      Both A and C

    Correct Answer
    D. Both A and C
    Explanation
    The correct answer is Both A and C. The Aatmanirbhar Bharat ARISE-ANIC initiative is launched by both AIM (Atal Innovation Mission) and NITI Aayog. AIM is a flagship initiative of the Indian government's NITI Aayog, which aims to promote innovation and entrepreneurship in the country. This joint initiative focuses on fostering innovation and entrepreneurship among the youth of India, particularly in the areas of science and technology.

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  • 6. 

    Which authority said it is at an advanced stage for preparation of a Multidimensional Poverty Index (MPI) parameter dashboard to rank states and Union Territories?

    • A.

      President

    • B.

      Prime Minister

    • C.

      Government of India

    • D.

      NITI Aayog

    Correct Answer
    D. NITI Aayog
    Explanation
    NITI Aayog is the correct answer because it is an authority in India responsible for formulating policies and promoting sustainable development. They have announced that they are in an advanced stage of preparing a Multidimensional Poverty Index (MPI) parameter dashboard to rank states and Union Territories. This initiative aims to measure poverty beyond just income and provide a comprehensive understanding of poverty in different regions of India.

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  • 7. 

    Who launched Smart Performance Appraisal Report Recording Online Window (SPARROW) system for Jammu and Kashmir Administrative Service officers?

    • A.

      YS Jagan Mohan Reddy

    • B.

      Manoj Sinha

    • C.

      Yogi Adityanath

    • D.

      Ramesh Pokhriyal

    Correct Answer
    B. Manoj Sinha
    Explanation
    Manoj Sinha launched the Smart Performance Appraisal Report Recording Online Window (SPARROW) system for Jammu and Kashmir Administrative Service officers.

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  • 8. 

    Which company has partnered with Cyber Peace Foundation (CPF) to create awareness on cyber safety among students?

    • A.

      Facebook

    • B.

      Whatsapp

    • C.

      Google

    • D.

      Twitter

    Correct Answer
    B. Whatsapp
    Explanation
    Whatsapp has partnered with Cyber Peace Foundation (CPF) to create awareness on cyber safety among students. This partnership aims to educate students about the potential risks and dangers of the internet, as well as provide them with the necessary tools and knowledge to stay safe online. By collaborating with CPF, Whatsapp is actively working towards promoting a safer online environment for students and empowering them to make informed decisions while using the platform.

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  • 9. 

    Which IIT launched ''ChakrDeCoV'' to decontaminate N95 masks?

    • A.

      IIT Roorkee

    • B.

      IIT Kanpur

    • C.

      IIT Lucknow

    • D.

      IIT Delhi

    Correct Answer
    D. IIT Delhi
    Explanation
    IIT Delhi launched "ChakrDeCoV" to decontaminate N95 masks.

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  • 10. 

    How many chinese mobile apps banned by Ministry of Information and Technology?

    • A.

      50

    • B.

      100

    • C.

      118

    • D.

      165

    Correct Answer
    C. 118
    Explanation
    The correct answer is 118. The Ministry of Information and Technology has banned a total of 118 Chinese mobile apps. This action was taken due to concerns over national security and the protection of user data. The ban was implemented to safeguard the interests of Indian citizens and prevent any potential threats posed by these apps.

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  • 11. 

    India has jointly won International Chess Olympiad with which nation?

    • A.

      Japan

    • B.

      China

    • C.

      South Korea

    • D.

      Russia

    Correct Answer
    D. Russia
    Explanation
    India has jointly won the International Chess Olympiad with Russia. The International Chess Olympiad is a prestigious chess tournament where teams from different nations compete against each other. In this case, India and Russia have achieved a joint victory, indicating that both teams have performed exceptionally well and have scored the same number of points in the tournament. This joint victory highlights the skill and talent of both Indian and Russian chess players.

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  • 12. 

    Who will sponsor Team India for Tokyo Olympics?

    • A.

      Patanjali

    • B.

      INOX Group

    • C.

      TATA Group

    • D.

      Reliance

    Correct Answer
    B. INOX Group
    Explanation
    INOX Group will sponsor Team India for the Tokyo Olympics.

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  • 13. 

    After M.S. Dhoni, Which Indian cricketer has also announced retirement from Cricket on August 15, 2020?

    • A.

      Virat Kohli

    • B.

       Mohommad Shami

    • C.

      Suresh Raina

    • D.

      Parthiv patel

    Correct Answer
    C. Suresh Raina
    Explanation
    Suresh Raina is the correct answer because he announced his retirement from international cricket on August 15, 2020, just a few hours after MS Dhoni announced his retirement. Raina had a successful career representing the Indian cricket team, known for his aggressive batting and excellent fielding skills. His retirement came as a surprise to many fans and marked the end of an era for Indian cricket.

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  • 14. 

    Which organization won Swachhta Hi Seva 2019 award?

    • A.

      NLCIL

    • B.

      Township Administration

    • C.

      Thermal Power Station -1

    • D.

      None of these

    Correct Answer
    A. NLCIL
    Explanation
    NLCIL won the Swachhta Hi Seva 2019 award.

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  • 15. 

    A famous person, David Douglas Duncan was passed away in France. He belongs to the profession of?

    • A.

      Lyricist

    • B.

      Animation

    • C.

      Photography

    • D.

      Writer

    Correct Answer
    C. Photography
    Explanation
    David Douglas Duncan was a famous photographer. He was known for his iconic images of war and conflict, particularly during the Korean and Vietnam Wars. He documented the lives of soldiers and civilians, capturing the harsh realities of war. His photography was highly regarded and he was considered one of the most influential photographers of his time.

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  • 16. 

    Who has been nominated for Noble Peace Prize 2021?

    • A.

      Narendra Modi

    • B.

      Donald Trump

    • C.

      Vladmir Putin

    • D.

      Imran Khan

    Correct Answer
    B. Donald Trump
    Explanation
    Donald Trump has been nominated for the Noble Peace Prize 2021. The nomination was made by a Norwegian politician, Christian Tybring-Gjedde, who cited Trump's efforts in brokering a peace deal between Israel and the United Arab Emirates. This nomination recognizes Trump's role in promoting peace and diplomacy in the Middle East region.

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  • 17. 

    Who is appointed by UNICEF for children's rights campaign?

    • A.

      Akshay Kumar

    • B.

      Aayushman Khurana

    • C.

      Virat Kohli

    • D.

      Jasprit Bumrah

    Correct Answer
    B. Aayushman Khurana
    Explanation
    Aayushman Khurana is appointed by UNICEF for children's rights campaign.

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  • 18. 

    From when will be 'One Nation One Ration Card' scheme, available across the country?

    • A.

      30th June

    • B.

      1st July

    • C.

      2nd July

    • D.

      5th July

    Correct Answer
    B. 1st July
    Explanation
    The 'One Nation One Ration Card' scheme will be available across the country from 1st July.

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  • 19. 

    Swachh Bharat Kranti is a Hindi version of which of the follwing book?

    • A.

      Swachh Survekshan

    • B.

      Clean India Mission

    • C.

      Swachh Bharat Revolution

    • D.

      Swachh Bharat Urban

    Correct Answer
    C. Swachh Bharat Revolution
    Explanation
    Swachh Bharat Kranti is the Hindi version of the book "Swachh Bharat Revolution". This book is likely to be a comprehensive guide or manifesto that outlines the revolution for a clean India. It may provide insights, strategies, and success stories related to the Swachh Bharat Abhiyan (Clean India Mission), which is a nationwide campaign initiated by the Government of India to promote cleanliness and hygiene. The book may serve as a valuable resource for individuals, communities, and policymakers interested in understanding and implementing the principles of the Swachh Bharat Abhiyan.

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  • 20. 

    What is the name of the book President of India received first copy?

    • A.

      President's Lady Pranaber Preyosi

    • B.

      Indradhanush Volume-II

    • C.

      Rashtrapati Bhavan: From Raj to Swaraj

    • D.

      Life at Rashtrapati Bhavan

    Correct Answer
    A. President's Lady Pranaber Preyosi
    Explanation
    The correct answer is "President's Lady Pranaber Preyosi." This book is about the life of the President of India's wife, and it is the first copy of the book that the President received.

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  • 21. 

    Pick up the correct proportions of chemical ingredients of cement

    • A.

      Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3

    • B.

      Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3

    • C.

      Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3

    • D.

      Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3

    Correct Answer
    A. Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3
    Explanation
    The correct answer is Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3. This is because the proportions of the chemical ingredients of cement are given in the order of lime, silica, alumina, and iron oxide, with the corresponding ratios being 63, 22, 6, and 3 respectively.

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  • 22. 

    The nuclear power station at Tarapur has the reactor of the __________ type.

    • A.

      Pressurized water

    • B.

      Boiling water

    • C.

      Gas cooled

    • D.

      Liquid metal cooled

    Correct Answer
    B. Boiling water
    Explanation
    The correct answer is Boiling water. This type of reactor uses water as both the coolant and the moderator. The heat generated by the nuclear reaction boils the water, producing steam that drives the turbines to generate electricity. The steam is then condensed back into water and recirculated in a continuous loop. This design is commonly used in nuclear power plants as it is relatively simple and efficient.

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  • 23. 

    The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).

    • A.

      Less than

    • B.

      Equal to

    • C.

      More than

    Correct Answer
    C. More than
    Explanation
    At constant pressure, the specific heat (cp) is greater than at constant volume (cv). This is because at constant pressure, the system can expand and do work on its surroundings, allowing for more energy to be absorbed as heat without a significant increase in temperature. In contrast, at constant volume, the system cannot expand, so any energy absorbed as heat will cause a larger increase in temperature. Therefore, cp is greater than cv.

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  • 24. 

    Which of the following pump is preferred for flood control and irrigation applications?

    • A.

      Centrifugal pump

    • B.

      Axial flow pump

    • C.

      Mixed flow pump

    • D.

      Reciprocating pump

    Correct Answer
    B. Axial flow pump
    Explanation
    The axial flow pump is preferred for flood control and irrigation applications because it is specifically designed to handle large volumes of water at low heads. It is capable of moving large amounts of water efficiently and is well-suited for applications where the water needs to be moved over long distances or at high flow rates. The axial flow pump works by creating a flow pattern parallel to the pump shaft, allowing for efficient movement of water in a straight line. This makes it ideal for flood control and irrigation purposes.

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  • 25. 

    The principle of jet propulsion is used in driving the ships and aeroplanes.

    • A.

      Correct

    • B.

      Incorrect

    Correct Answer
    A. Correct
    Explanation
    Jet propulsion is a method of propulsion that involves the expulsion of a high-speed jet of fluid or gas in the opposite direction. This principle is indeed used in driving ships and airplanes. In jet engines, fuel is burned to produce a high-speed exhaust jet, which propels the aircraft forward. Similarly, in water jet propulsion systems used in ships, water is forced out at high velocity through a nozzle to generate thrust. Therefore, the given answer is correct as it accurately states that the principle of jet propulsion is used in driving ships and airplanes.

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  • 26. 

    Which of the following is generally considered as opaque surface towards radiations?

    • A.

      A) Gases

    • B.

      B) Solids

    • C.

      C) Liquids

    • D.

      Both (b) and (c)

    Correct Answer
    D. Both (b) and (c)
    Explanation
    Solids and liquids are generally considered as opaque surfaces towards radiations. Unlike gases, which are transparent to many forms of radiation, solids and liquids have a dense molecular structure that absorbs and scatters radiation, preventing it from passing through. This is why we cannot see through objects like walls or opaque liquids. Therefore, both (b) and (c) are correct answers.

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  • 27. 

    Which of the following is concerned with both heat and mass transfer ?

    • A.

      Lewis relationship

    • B.

      Nusselt number

    • C.

      Kutateladze number

    • D.

      Froude number

    Correct Answer
    A. Lewis relationship
    Explanation
    The Lewis relationship is concerned with both heat and mass transfer. It relates the ratio of heat transfer to mass transfer in a system. It is commonly used in chemical engineering to analyze processes involving simultaneous heat and mass transfer, such as distillation or absorption. The Lewis relationship helps in understanding the efficiency of these processes and optimizing their design.

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  • 28. 

    The ability of a material to remain magnetized after removal of the magnetizing force is known as

    • A.

      Permeability

    • B.

      Reluctance

    • C.

      Hysteresis

    • D.

      Retentivity

    Correct Answer
    D. Retentivity
    Explanation
    Retentivity refers to the ability of a material to retain its magnetization even after the magnetizing force is removed. It indicates the strength of the material's magnetic field and its ability to maintain a magnetic state. Materials with high retentivity are used in permanent magnets, while those with low retentivity are used in temporary magnets. Permeability, on the other hand, refers to the ease with which a material can be magnetized. Reluctance is the measure of opposition to the flow of magnetic flux. Hysteresis refers to the lagging of the magnetic field behind the magnetizing force.

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  • 29. 

    A circuit breaker is a

    • A.

      Fuse

    • B.

      Switch

    • C.

      Resettable protective device

    • D.

      Resistor

    Correct Answer
    C. Resettable protective device
    Explanation
    A circuit breaker is a resettable protective device that automatically interrupts the flow of electrical current in a circuit when it detects an overload or short circuit. Unlike a fuse, which needs to be replaced once it blows, a circuit breaker can be reset after it trips. It acts as a switch that can be manually turned on or off to control the flow of electricity. Its primary function is to protect electrical circuits and appliances from damage caused by excessive current or faults, ensuring safety and preventing potential hazards.

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  • 30. 

    If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

    • A.

      Increases

    • B.

      Decreases

    • C.

      Remains the same

    • D.

      Doubles

    Correct Answer
    B. Decreases
    Explanation
    When the cross-sectional area of a magnetic field increases but the flux remains the same, it means that the magnetic field is spreading out over a larger area. As a result, the flux density, which is the amount of magnetic field lines passing through a unit area, decreases. This is because the same amount of magnetic field lines are now distributed over a larger area, leading to a decrease in the concentration or density of the magnetic field.

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  • 31. 

    If you used 600 W of power for 60 h, you have used

    • A.

      36 kWh

    • B.

      3.6 kWh

    • C.

      10 kWh

    • D.

      1 kWh

    Correct Answer
    A. 36 kWh
    Explanation
    To find the total energy used, we need to multiply the power (in watts) by the time (in hours). In this case, the power used is 600 W and the time is 60 hours. Multiplying these values gives us 36,000 watt-hours or 36 kWh (kilo-watt hours). Therefore, the correct answer is 36 kWh.

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  • 32. 

    Sulphuric acid is used as a catalyst in the

    • A.

      Hydrogenation of oils

    • B.

      Gas phase oxidation of SO2 in chamber process.

    • C.

      Alkylation of hydrocarbons.

    • D.

      None of these.

    Correct Answer
    C. Alkylation of hydrocarbons.
    Explanation
    Sulphuric acid is used as a catalyst in the alkylation of hydrocarbons. Alkylation is a chemical process in which an alkyl group is added to a molecule. Sulphuric acid helps in the formation of the alkyl group by facilitating the transfer of alkyl groups between molecules. This process is commonly used in the production of gasoline, where sulphuric acid is used to combine smaller hydrocarbon molecules to form larger, more complex hydrocarbon molecules.

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  • 33. 

    Radioactive decay follows __________ order kinetics.

    • A.

      First

    • B.

      Second

    • C.

      Third

    • D.

      Zero

    Correct Answer
    A. First
    Explanation
    Radioactive decay follows first-order kinetics because the rate of decay is directly proportional to the concentration of the radioactive substance. In other words, the rate of decay decreases exponentially over time. This means that the half-life of the substance remains constant, regardless of the initial concentration.

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  • 34. 

    In an exothermic chemical reaction, the reactants compared to the products have

    • A.

      Higher temperature

    • B.

      More energy

    • C.

      Less energy

    • D.

      Same energy.

    Correct Answer
    B. More energy
    Explanation
    In an exothermic chemical reaction, the reactants have more energy compared to the products. This is because exothermic reactions release energy in the form of heat, light, or sound. The reactants start with a higher energy level, and during the reaction, energy is released, resulting in products with lower energy. This decrease in energy is what causes the release of heat or other forms of energy. Therefore, the reactants have more energy than the products in an exothermic reaction.

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  • 35. 

    Which of the following will give maximum gas conversion ?

    • A.

      Fixed bed reactor.

    • B.

      Fluidised bed reactor.

    • C.

      Semi-fluidised bed reactor.

    • D.

      Plug-flow catalytic reactor.

    Correct Answer
    C. Semi-fluidised bed reactor.
    Explanation
    A semi-fluidised bed reactor is designed to have a higher gas conversion rate compared to other types of reactors. In this type of reactor, the solid particles are partially fluidized, allowing for better mixing and contact between the gas and solid phases. This increased contact leads to a higher conversion rate of the gas, making the semi-fluidised bed reactor the best choice for achieving maximum gas conversion.

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  • 36. 

    Power required to drive a centrifugal pump is directly proportional to __________ of its impeller

    • A.

      Diameter

    • B.

      Square of diameter

    • C.

      Cube of diameter

    • D.

      Fourth power of diameter

    Correct Answer
    D. Fourth power of diameter
    Explanation
    The power required to drive a centrifugal pump is directly proportional to the fourth power of its impeller's diameter. This means that as the diameter of the impeller increases, the power required to drive the pump increases exponentially. This is because the impeller's diameter affects the amount of fluid that can be moved by the pump, and increasing the diameter increases the volume of fluid being handled, thus requiring more power to drive the pump effectively.

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  • 37. 

    Which of the following has the minimum atomic mass?

    • A.

      Oxygen

    • B.

      Sulphur

    • C.

      Nitrogen

    • D.

      Carbon

    Correct Answer
    D. Carbon
    Explanation
    Carbon has the minimum atomic mass among the given options. This is because carbon has an atomic mass of 12.01 atomic mass units (amu), while oxygen has an atomic mass of 16.00 amu, sulphur has an atomic mass of 32.06 amu, and nitrogen has an atomic mass of 14.01 amu. Therefore, carbon has the lowest atomic mass compared to the other elements listed.

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  • 38. 

    All the commercial liquid fuels are derived from natural petroleum (or crude oil).

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    All commercial liquid fuels are derived from natural petroleum or crude oil. This is because petroleum is a complex mixture of hydrocarbons that can be refined into various fuels such as gasoline, diesel, and jet fuel. These fuels are widely used in transportation and industry due to their high energy density and availability. Alternative fuels, such as biofuels or synthetic fuels, are also derived from petroleum or its byproducts. Therefore, it is true that all commercial liquid fuels are derived from natural petroleum.

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  • 39. 

    In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

    • A.

      Beginning of suction stroke

    • B.

      End of suction stroke

    • C.

      Beginning of exhaust stroke

    • D.

      End of exhaust stroke

    Correct Answer
    A. Beginning of suction stroke
    Explanation
    In a four-stroke cycle, the minimum temperature inside the engine cylinder occurs at the beginning of the suction stroke. During the suction stroke, the piston moves downward, creating a vacuum that allows the intake valve to open. This allows the fresh air-fuel mixture to enter the cylinder. Since the air-fuel mixture is being drawn into the cylinder from the outside, it is usually cooler than the gases inside the cylinder. Therefore, the temperature inside the cylinder is at its minimum at the beginning of the suction stroke.

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  • 40. 

    The function of a crosshead is to guide motion of the __________ and to prevent it from bending.

    • A.

      Piston rod

    • B.

      Connecting rod

    • C.

      Eccentric rod

    • D.

      Valve rod

    Correct Answer
    A. Piston rod
    Explanation
    The function of a crosshead is to guide motion of the piston rod and to prevent it from bending. The crosshead is an essential component in reciprocating engines and compressors, as it helps to maintain the alignment and stability of the piston rod during its back and forth motion. It ensures that the piston rod moves in a straight line, preventing any bending or misalignment that could lead to mechanical failure or decreased efficiency. Therefore, the piston rod is the correct answer as it is directly related to the function of the crosshead.

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  • 41. 

    Distemper is used to coat

    • A.

      External concrete surfaces

    • B.

      Interior surfaces not exposed to weather

    • C.

      Woodwork

    • D.

      Compound walls

    Correct Answer
    B. Interior surfaces not exposed to weather
    Explanation
    Distemper is a type of paint that is commonly used for interior surfaces that are not exposed to weather. This is because distemper is not as durable or weather-resistant as other types of paint. It is more suitable for indoor use where the surface does not come into direct contact with rain, sunlight, or extreme temperature changes. Distemper provides a matte finish and is often used on walls and ceilings in homes and buildings.

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  • 42. 

    Which type of light energy is effectively absorbed by CO2 in the lower boundary of the troposphere ?

    • A.

      X - rays

    • B.

      UV - rays

    • C.

      Visible light

    • D.

      Infra-red rays

    Correct Answer
    D. Infra-red rays
    Explanation
    CO2 effectively absorbs infra-red rays in the lower boundary of the troposphere. Infra-red rays have longer wavelengths than visible light and UV rays, making them more easily absorbed by CO2 molecules. This absorption of infra-red radiation by CO2 is a key factor in the greenhouse effect, as it traps heat in the atmosphere and contributes to global warming.

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  • 43. 

    A hydraulic jump in a control meter will be formed above the control, if its original

    • A.

      Depth is more than critical depth

    • B.

      Depth is less than the critical depth

    • C.

      Depth is equal to critical depth

    • D.

      None of these.

    Correct Answer
    B. Depth is less than the critical depth
    Explanation
    A hydraulic jump occurs when there is a sudden change in flow velocity in an open channel flow. It is characterized by a rapid increase in water depth and a decrease in flow velocity. In this case, if the depth is less than the critical depth, it means that the flow velocity is high enough to create a hydraulic jump. This occurs because the flow transitions from supercritical to subcritical, resulting in a sudden increase in depth. Therefore, the correct answer is that a hydraulic jump will be formed above the control if the depth is less than the critical depth.

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  • 44. 

    The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known

    • A.

      Grading

    • B.

      Curing

    • C.

      Mixing

    • D.

      Batching

    • E.

      None of these

    Correct Answer
    C. Mixing
    Explanation
    Mixing is the correct answer because it refers to the process of combining concrete ingredients in the correct proportions to ensure uniformity. Proper mixing is essential to achieve the desired strength and durability of the concrete. It involves thoroughly blending cement, aggregates, water, and any additives or admixtures to create a homogeneous mixture. This ensures that all the ingredients are evenly distributed and that the concrete will have consistent properties throughout.

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  • 45. 

    For quality control of Portland cement, the test essentially done is

    • A.

      Setting time

    • B.

      Soundness

    • C.

      Tensile strength

    • D.

      Consistency

    • E.

      All the above.

    Correct Answer
    E. All the above.
    Explanation
    The correct answer is "All the above." This is because for quality control of Portland cement, multiple tests are conducted. The setting time test determines the time taken for the cement to harden, the soundness test checks for any expansion or cracking, the tensile strength test measures the cement's ability to withstand pulling forces, and the consistency test assesses the workability of the cement. Therefore, all of these tests are essential for ensuring the quality of Portland cement.

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