Sterling & Wilson Interview Questions, Process, and Tips

Q1. What are the Pump head loss calculation parameters
Ans. 
Pump head loss calculation parameters include friction loss, elevation change, velocity head, and fittings.
• Friction loss due to pipe roughness

• Elevation change between inlet and outlet

• Velocity head due to fluid velocity

• Losses from fittings like elbows, tees, and valves
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Q2. What is the AHU components
Ans. 
AHU components refer to the various parts of an Air Handling Unit that work together to regulate and circulate air in a building.
• Filters - to remove dust and particles from the air

• Coils - for heating or cooling the air

• Fans - to circulate the air

• Dampers - to control the flow of air

• Humidifiers/dehumidifiers - to adjust the humidity levels
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Q3. Which type of blowers are use in AHU
Ans. 
Centrifugal blowers are commonly used in AHUs for their efficiency and ability to handle high volumes of air.
• Centrifugal blowers are preferred for AHUs due to their ability to handle high volumes of air efficiently.

• They are more energy efficient compared to other types of blowers.

• Examples of centrifugal blowers commonly used in AHUs include forward curved, backward inclined, and airfoil designs.
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Q4. What is the difference between primary pump or secondary pump
Ans. 
Primary pump is the main pump responsible for the majority of the pumping work, while secondary pump is a backup pump used in case the primary pump fails.
• Primary pump is the main pump in a system, while secondary pump is a backup pump.

• Primary pump is responsible for the majority of the pumping work, while secondary pump is used only when needed.

• Examples: In a heating system, the primary pump circulates hot water throug...read more
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Q5. What is the AHU valve conection
Ans. 
AHU valve connection refers to the connection of valves in an air handling unit for controlling the flow of air.
• AHU valve connection is essential for regulating the flow of air in an air handling unit.

• Valves are typically connected to the AHU ductwork to control the amount of air entering or exiting the unit.

• Properly connected valves ensure efficient operation of the AHU system.

• Examples of AHU valves include damper val
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Q6. What things are required in chilled water pipe size
Ans. 
Chilled water pipe size requirements depend on flow rate, pressure drop, material, insulation, and system design.
• Flow rate: Determine the required flow rate of chilled water in the system.

• Pressure drop: Calculate the pressure drop to ensure efficient operation.

• Material: Select appropriate pipe material based on temperature and pressure requirements.

• Insulation: Insulate the pipes to prevent heat gain or loss.

• System desi...read more
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Q7. What is the chiller conection
Ans. 
The chiller connection refers to the method by which a chiller unit is connected to a building's HVAC system.
• Chiller connection typically involves piping to transport chilled water from the chiller to the building's air handling units.

• The connection may also include electrical wiring for power supply and control signals.

• Proper chiller connection is crucial for efficient cooling and proper functioning of the HVAC system
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Q1. Tell me about yourself
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Q2. Why sterling and wilson
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Q3. Why different skill sets differentiates you from others
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Q1. Asked about how we laying DC and string cable
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Q2. How we do grouping in dc trench layout
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Q1. What is your expectation from point of money ,learning etc of this company .
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Q2. How much experience in solar industries.
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Q1. Draw a layout in AutoCAD
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Q2. Draw a icr equipment layout
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Is their has 30 min to solve 30 question
and topic has the check English , English Grammar

Check the code of Python and Data Science program
It also has 30 min and 30 Question

Q1. Tell me the difference between List and Tuple ?
Ans. 
List is mutable, Tuple is immutable in Python.
• List can be modified after creation, Tuple cannot be modified.

• List is defined using square brackets [], Tuple is defined using parentheses ().

• List is used for collections of items that may change, Tuple is used for fixed collections.

• Example: list_example = [1, 2, 3], tuple_example = (4, 5, 6)
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Q2. Can we use logistic regression for multi class classification ?
Ans. 
Yes, logistic regression can be used for multi class classification by using techniques like one-vs-rest or softmax.
• Logistic regression is typically used for binary classification, but it can be extended to handle multiple classes.

• One common approach is to use one-vs-rest (OvR) strategy, where a separate binary logistic regression model is trained for each class.

• Another approach is to use softmax regression, which is a...read more
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Q3. What is built in data
Ans. 
Built-in data refers to pre-existing datasets or information that is already included in a software or system.
• Built-in data is typically provided by the software or system for analysis or processing.

• Examples include sample datasets in statistical software like R or Python libraries like scikit-learn.

• Built-in data can also refer to default datasets in databases or data warehouses.

• It can save time and effort by providing
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Q4. What is Decorators in python ?
Ans. 
Decorators in Python are functions that modify the behavior of other functions.
• Decorators are denoted by the @ symbol followed by the decorator name.

• They are commonly used for logging, timing, authentication, etc.

• Decorators can be used to add functionality to existing functions without modifying their code.
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Q5. What is Lambda function ?
Ans. 
A lambda function is a small anonymous function defined without a name.
• Lambda functions are used for creating small, one-time use functions.

• They can take any number of arguments, but can only have one expression.

• Lambda functions are often used in conjunction with higher-order functions like map, filter, and reduce.

• Example: lambda x: x*2 defines a lambda function that doubles the input x.
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Q1. What is Slump Cone Top diameter ?
Ans. 
Slump cone top diameter is the diameter of the top opening of a slump cone used to measure the consistency of concrete.
• Slump cone top diameter is typically around 4 inches.

• It is an important factor in determining the workability of concrete.

• The slump cone test involves filling the cone with concrete, then lifting the cone to see how much the concrete slumps.

• A larger top diameter of the slump cone indicates a higher wor
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Q2. What is your M30 Concrete Compressive strength ?
Ans. 
The M30 concrete compressive strength is typically around 30 MPa.
• M30 concrete is a mix design with a characteristic compressive strength of 30 MPa.

• It is commonly used in construction for various structural elements.

• The strength of M30 concrete can vary based on factors like water-cement ratio, curing conditions, and quality of materials.
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