Roca Bathroom Products Lab Technician Interview Questions and Answers

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Q1. Related to cement and concrete testing
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Q2. Concrete technology subject questions
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Q3. Water cement ratio
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Q4. Mix Design , test of cement & concrete .
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Q1. (1)How much cement produced in India? Ans-500mega tone. (2)Why you join in cement industry? Ans-Grow possibility 100 💯 percentage
Ans. 
India produces 500 mega tonnes of cement. I am interested in joining the cement industry for its growth potential.
• India is one of the largest producers of cement in the world

• Cement industry has a high growth potential due to increasing infrastructure development

• Joining the industry can provide opportunities for career growth and development
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Q2. Raw material of cement? Ans-Lime stone
Ans. 
The raw material of cement is limestone.
• Limestone is a sedimentary rock composed mainly of calcium carbonate.

• It is quarried and crushed into small pieces before being used in cement production.

• Other materials such as clay, shale, sand, and iron ore are also used in cement production.

• The limestone is heated in a kiln to produce a substance called clinker, which is then ground into a fine powder and mixed with gypsum to
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Q3. What types of bearing are used in cement ball mill? Ans-Slide shoe bearing
Ans. 
Slide shoe bearing is used in cement ball mill.
• Slide shoe bearing is a type of hydrodynamic bearing that supports axial and radial loads.

• It consists of two parts - a stationary part and a rotating part.

• Examples of other types of bearings used in cement ball mills include trunnion bearings and roller bearings.
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Q4. Why bucket elevator are used? Ans-For material conveying.
Ans. 
Bucket elevators are used for efficient and reliable material conveying.
• Bucket elevators are commonly used in industries such as agriculture, mining, and construction.

• They are designed to move bulk materials vertically, such as grains, ores, and cement.

• Bucket elevators are efficient and reliable, with low maintenance requirements.

• They come in various sizes and configurations to suit different applications.

• Bucket elevat...read more
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Q5. Why we used flyash in cement? Ans-workability of plastic and strength development.
Ans. 
Flyash is used in cement for workability of plastic and strength development.
• Flyash is a byproduct of coal combustion and is rich in silica, alumina, and calcium oxide.

• It improves the workability of plastic by reducing water demand and increasing the fineness of cement.

• Flyash also contributes to the strength development of cement by reacting with calcium hydroxide to form additional cementitious compounds.

• It also reduc...read more
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Q6. What is opc and opc? Ans-opc stand-ordinary Portland cement. Ppc-pozolana Portland cement.
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Q7. What is rotary kiln produces? Ans-clinker
Ans. 
Rotary kiln produces clinker.
• Rotary kiln is a large, rotating cylindrical furnace used in various industrial processes.

• It is commonly used in the production of cement.

• The raw materials are fed into the kiln and heated to extreme temperatures, causing chemical reactions that result in the formation of clinker.

• Clinker is a hard, nodular material that is ground into a fine powder to produce cement.
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Q8. Working of ball mill?
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A ball mill is a grinding machine used to grind, blend, and sometimes for mixing materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering.
• A ball mill works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell.

• A ball mill consists of a hollow cylindrical shell rotating about its axis.

• The axis of t...read more
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Q1. Finness cement is what?
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Q2. Biggest challenge for cement industry?
Ans. 
The biggest challenge for the cement industry is environmental sustainability.
• Environmental regulations and emissions control

• Reducing carbon footprint

• Waste management and recycling

• Water conservation

• Energy efficiency

• Sustainable sourcing of raw materials
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Q1. General Questions
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Q2. Name And Faimly details
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Q3. Prepration of knowledge on you field
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Q1. Motor mp and maintenance
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Q2. Lighting maintenance
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Q3. Motor mp legistence
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Q4. Motor Mp maintenance
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Q5. Lighting maintenance
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Exlent questions in aptitude test.

Q1. Technical questions in one by one
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Q2. Great one technical questions in cement
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Q1. Monthly salary ,and pay silp
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Q2. Salery slip, CTC
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Q3. Base payment salary
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Posted location ,in any one location in Himachal Pradesh and North site

Q1. What is the maening of Efflorescence in Concrete
Ans. 
Efflorescence in concrete is the white powdery substance that forms on the surface due to the migration of soluble salts.
• Efflorescence is caused by water moving through the concrete, dissolving salts and carrying them to the surface.

• It is commonly seen in new concrete structures but can also occur in older ones.

• Efflorescence can be removed using various cleaning methods such as brushing, pressure washing, or chemical t...read more
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