Suncity Projects Site Engineer Interview Questions and Answers

Qas asked some questions from profit and loss and trigonometry.

Q1. The difference between opc and ppc
Ans. 
OPC is Ordinary Portland Cement, while PPC is Portland Pozzolana Cement. The main difference is the materials used in their production.
• OPC is made from limestone and clay, while PPC is made from a mixture of pozzolanic material like fly ash, volcanic ash, etc.

• PPC is more environmentally friendly as it uses industrial by-products, reducing the carbon footprint.

• PPC has better workability and is more resistant to chemical...read more
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Q2. The grade of steel currently in usage and their types
Ans. 
Different grades of steel are used for different applications, such as construction, automotive, and manufacturing.
• Common grades of steel include A36, A572, and A500 for construction purposes.

• High-strength low-alloy (HSLA) steels like A588 and A709 are used in structural applications.

• Tool steels like D2 and O1 are used for cutting and shaping materials.

• Stainless steels like 304 and 316 are corrosion-resistant and used ...read more
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Q3. The setting time of concrete
Ans. 
Setting time of concrete refers to the time it takes for the concrete to harden and become solid.
• Setting time can vary based on factors like temperature, humidity, and mix design.

• Setting time is important for construction projects to ensure proper curing and strength development.

• For example, in hot weather, concrete may set faster, while in cold weather it may take longer.

• Accelerators or retarders can be added to adjus
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Q4. Volume of 1 bag of cement and 1 cube
Ans. 
The volume of 1 bag of cement and 1 cube can vary depending on the size and density of the materials.
• The volume of 1 bag of cement is typically around 0.035 cubic meters or 35 liters.

• The volume of 1 cube can vary depending on the size, but a standard cube may have a volume of 1 cubic meter.

• It's important to consider the density of the materials when calculating volume.
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Q5. Whats the use of fly ash in concrete
Ans. 
Fly ash is used in concrete as a replacement for Portland cement to improve workability, reduce permeability, increase durability, and decrease cost.
• Improves workability by reducing water demand

• Reduces permeability and increases durability

• Decreases cost by replacing some of the Portland cement

• Can improve the long-term strength of concrete

• Helps in reducing greenhouse gas emissions
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Q6. Whats hoop strees and punching failure
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Hoop stress is the stress exerted circumferentially in a cylindrical pressure vessel, while punching failure is a type of failure that occurs in structural elements subjected to concentrated loads.
• Hoop stress is calculated using the formula: σ = PD/2t, where P is the internal pressure, D is the diameter, and t is the thickness of the vessel.

• Punching failure occurs when a concentrated load is applied to a structural ele...read more
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