Credera Interview Questions and Answers

The different types of ducts in air conditioning include rectangular ducts, round ducts, flexible ducts, and spiral ducts.

• Rectangular ducts are commonly used and are made of sheet metal.

• Round ducts are used for better airflow and are made of galvanized steel.

• Flexible ducts are easy to install and are made of a flexible plastic material.

• Spiral ducts are used for large commercial applications and are made of galvanized steel.

Yes

• Plinth height calculation for equipment involves determining the required height of the equipment's base or foundation.

• Factors to consider include equipment weight, vibration, accessibility, maintenance requirements, and safety regulations.

• Calculations may involve structural engineering principles, load-bearing capacity, and equipment specifications.

• Example: For an HVAC unit, plinth height calculation would consider the weight of the unit, the need for proper airflow, and ...read more

Yes, I can do pump head and ESP calculations.

• Pump head calculation involves determining the total dynamic head (TDH) of a pump system.

• ESP (External Static Pressure) calculation is used in HVAC systems to determine the pressure required to move air through ductwork.

• Both calculations require knowledge of system parameters such as flow rate, pipe diameter, pipe length, and friction losses.

• Formulas and equations are used to calculate pump head and ESP based on the given parameter...read more

Procedural programming focuses on procedures and functions, while OOP focuses on objects and classes.

• Procedural programming uses a top-down approach, breaking down tasks into smaller procedures/functions.

• OOP focuses on creating objects that contain both data and methods to manipulate that data.

• In procedural programming, data and functions are separate entities, while in OOP, they are encapsulated within objects.

• Example of procedural programming: C programming language.

• Example...read more

The number of lights in one circuit depends on the electrical load and circuit design.

• The number of lights in a circuit is determined by the wattage of the lights and the maximum load capacity of the circuit.

• It is important to calculate the total wattage of the lights to ensure it does not exceed the circuit's capacity.

• For example, if each light is 60 watts and the circuit can handle a maximum of 1200 watts, you can have up to 20 lights in one circuit.

Speed in AutoCAD refers to the rate at which the cursor moves on the screen while using the software.

• Speed can be adjusted in AutoCAD settings to suit the user's preference.

• A higher speed setting means the cursor moves faster across the screen.

• Conversely, a lower speed setting means the cursor moves slower.

• Adjusting the speed can help improve efficiency and accuracy in drafting.

• For example, a user may increase the speed when working on large-scale drawings to navigate quickly...read more