Armstrong International Interview Questions and Answers

Analytical reasoning questions.

Q1. Core basics of thermodynamics and heat & mass balance
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Q1. What insights can you share based on your past experience?
Ans. 
I can share insights on effective sales strategies, team management, and client relationship building.
• Utilizing data analytics to identify market trends and target potential clients

• Implementing personalized sales pitches to cater to individual client needs

• Motivating and training sales teams to maximize performance

• Establishing strong relationships with clients to ensure repeat business

• Adapting sales strategies based on ...read more
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Q1. What is HVAC?
Ans. 
HVAC stands for Heating, Ventilation, and Air Conditioning, crucial for indoor climate control and comfort.
• Heating: Involves systems like furnaces and heat pumps to maintain warm indoor temperatures during cold weather.

• Ventilation: Ensures proper air circulation and quality, using exhaust fans and air filters to remove pollutants.

• Air Conditioning: Cools indoor spaces using refrigerants and evaporators, essential for co...read more
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Q2. What are the main components of an AHU (Air Handling Unit)?
Ans. 
An AHU circulates and conditions air in HVAC systems, ensuring comfort and air quality in buildings.
• Fan: Moves air through the system; can be centrifugal or axial.

• Filters: Remove dust and particulates; examples include HEPA and MERV filters.

• Coils: Used for heating or cooling; examples include chilled water coils and hot water coils.

• Dampers: Control airflow and pressure; examples include outside air dampers and return a...read more
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Q3. What is the meaning of BMS?
Ans. 
BMS stands for Building Management System, which controls and monitors building systems for efficiency and comfort.
• BMS integrates various systems like HVAC, lighting, and security for centralized control.

• It enhances energy efficiency by optimizing system performance based on real-time data.

• Examples include controlling temperature settings based on occupancy or time of day.

• BMS can provide alerts for maintenance needs, i...read more
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Q4. How do you solve for AHU parameters?
Ans. 
To solve for AHU parameters, analyze airflow, temperature, humidity, and pressure to ensure optimal performance.
• Calculate airflow requirements using the formula: Q = A x V, where Q is airflow, A is area, and V is velocity.

• Determine temperature rise or drop across the AHU using the heat transfer equation: Q = mcΔT.

• Assess humidity levels by measuring the wet bulb and dry bulb temperatures to find the enthalpy.

• Use pressur...read more
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Q5. What types of tests are involved in HVAC validations?
Ans. 
HVAC validations involve various tests to ensure system performance, efficiency, and compliance with standards.
• Airflow Testing: Measuring airflow rates to ensure proper ventilation.

• Temperature Calibration: Verifying thermostat accuracy against standard references.

• Pressure Testing: Checking ductwork for leaks and ensuring proper pressure levels.

• Refrigerant Charge Verification: Ensuring the correct amount of refrigerant ...read more
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Q6. What is the classification of grades?
Ans. 
Grades classify HVAC and BMS systems based on efficiency, performance, and application suitability.
• Grade A: High efficiency, suitable for commercial applications (e.g., chillers).

• Grade B: Moderate efficiency, often used in residential settings (e.g., split systems).

• Grade C: Basic systems, typically older models with lower performance (e.g., window units).

• Grade D: Non-efficient systems, often not recommended for new ins...read more
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Q7. What are your responsibilities?
Ans. 
As an HVAC and BMS Technician, I ensure optimal performance of heating, ventilation, air conditioning, and building management systems.
• Conduct regular maintenance on HVAC systems to ensure efficiency and longevity.

• Troubleshoot and repair issues in heating and cooling systems, such as replacing faulty compressors.

• Install and configure building management systems (BMS) for automated control of HVAC operations.

• Monitor sys...read more
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Q8. What are the utility parameters?
Ans. 
Utility parameters are key metrics that define the performance and efficiency of HVAC and BMS systems.
• Energy Consumption: Measures the amount of energy used by HVAC systems, e.g., kWh per month.

• Temperature Control: Monitors the temperature settings and variations in different zones.

• Humidity Levels: Assesses the moisture content in the air, important for comfort and equipment longevity.

• Air Quality: Evaluates the levels ...read more
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Q9. What are the acceptable limits for room temperatures?
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Q10. What is the safety procedure for an Air Handling Unit (AHU)?
Ans. 
Safety procedures for an AHU ensure safe operation and maintenance, minimizing risks to personnel and equipment.
• Always disconnect power before performing maintenance to prevent electrical shock.

• Use personal protective equipment (PPE) such as gloves and goggles when handling components.

• Ensure proper lockout/tagout (LOTO) procedures are followed to prevent accidental startup.

• Check for any leaks or unusual noises before s...read more
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Q1. What is the procedure for problem solving
Ans. 
The procedure for problem solving involves identifying the issue, analyzing the root cause, brainstorming solutions, implementing a plan, and evaluating the results.
• Identify the problem or issue at hand

• Gather relevant data and information

• Analyze the root cause of the problem

• Brainstorm potential solutions

• Develop a plan of action

• Implement the chosen solution

• Evaluate the results and adjust as needed
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Q1. Experience in pipeline welding?
Ans. 
Yes, I have experience in pipeline welding.
• Certified in pipeline welding techniques

• Proficient in using welding equipment and tools

• Experience in welding various types of pipelines such as gas, oil, and water pipelines

• Knowledge of safety protocols and regulations related to pipeline welding
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Q1. What is your basic salary expectation
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Q1. Define steam Define enthalpy
Ans. 
Steam is the gaseous state of water when heated above its boiling point. Enthalpy is the total heat content of a system.
• Steam is formed when water is heated to its boiling point and changes from liquid to gas

• Enthalpy is a thermodynamic property that represents the total heat content of a system

• Enthalpy is often used in thermodynamics to analyze energy changes in chemical reactions
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Q1. Explain future plan
Ans. 
My future plan is to continue expanding my technical skills and knowledge in order to become a subject matter expert in the field of service engineering.
• Pursue advanced training and certifications in relevant technologies

• Seek opportunities to work on challenging projects that will enhance my problem-solving abilities

• Network with industry professionals to stay updated on the latest trends and developments

• Eventually aim ...read more
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Q2. Introduction yourself
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