Imdaad Senior Hvac Technician Interview Questions and Answers for Experienced

Q1. Tell me about your self
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Sr.enjineer mock test

Q1. Ups safety realted Csu realted
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Q1. Process of Chillers operation?
Ans. 
Chillers operate by removing heat from a liquid through a refrigeration cycle.
• Chillers use a compressor to compress refrigerant gas, which then condenses into a liquid.

• The liquid refrigerant is then pumped through an evaporator, where it absorbs heat from the chilled water.

• The refrigerant then returns to the compressor to repeat the cycle.

• Chillers can be air-cooled or water-cooled, depending on the application.

• Chillers...read more
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Q2. What's the work of actuator ?
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Actuator is a device that converts electrical energy into mechanical motion.
• Actuators are used in HVAC systems to control the flow of air, water, or steam.

• They can be electric, pneumatic, or hydraulic.

• Examples of actuators include valves, dampers, and motors.

• Actuators are essential for maintaining temperature, humidity, and air quality in HVAC systems.
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Q1. What is your strength
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Q1. About pumps and seals
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Q1. Bearing assembly
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Q1. Types of Flow meter
Ans. 
Flow meters are devices used to measure the flow rate of a fluid in a pipe or conduit.
• Differential Pressure Flow Meters (Orifice, Venturi, Pitot Tube)

• Velocity Flow Meters (Turbine, Electromagnetic, Ultrasonic)

• Positive Displacement Flow Meters (Rotary, Oval Gear, Nutating Disk)

• Mass Flow Meters (Coriolis, Thermal, Weighing)

• Open Channel Flow Meters (Flume, Weir)
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Q2. Calibration of Control valve
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Calibration of control valve involves adjusting the valve to ensure it opens and closes at the correct set points.
• Calibration involves adjusting the valve's position to match the desired input signal.

• Use calibration tools such as pressure gauges, flow meters, and positioners to adjust the valve.

• Perform calibration regularly to ensure the valve operates accurately and efficiently.

• Document calibration procedures and resu...read more
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