Macleods Pharmaceuticals Senior Technician Interview Questions and Answers

There are various types of pressure gauges used in different industries.

• Mechanical pressure gauges: These gauges use mechanical elements like springs or Bourdon tubes to measure pressure.

• Digital pressure gauges: These gauges provide a digital readout of pressure and often have additional features like data logging.

• Differential pressure gauges: These gauges measure the difference in pressure between two points.

• Absolute ...read more

RTD (Resistance Temperature Detector) works on the principle of change in electrical resistance with temperature.

• RTD measures temperature by sensing the change in electrical resistance of a metal wire or film.

• As the temperature increases, the resistance of the RTD also increases.

• The most common type of RTD is made of platinum (PT100) and has a resistance of 100 ohms at 0 degrees Celsius.

• RTDs are highly accurate and sta...read more

Magnetic flowmeters, also known as mag flowmeters, measure fluid flow by using Faraday's law of electromagnetic induction.

• Mag flowmeters work based on the principle of Faraday's law of electromagnetic induction.

• They consist of a pipe with a magnetic field and electrodes on the sides.

• When a conductive fluid flows through the pipe, it generates a voltage proportional to the flow rate.

• The electrodes measure this voltage a...read more

Control valves are used to regulate the flow of fluids in a process system.

• Control valves can be classified into different types such as globe valves, butterfly valves, ball valves, and plug valves.

• The working principle of control valves involves the use of a valve body, actuator, and positioner.

• The valve body contains a flow passage that can be opened or closed to control the flow of fluid.

• The actuator is responsible ...read more

HVAC has high pressure from the compressor to the condenser.

• High pressure is generated by the compressor and sent to the condenser.

• The pressure is typically around 300-400 PSI.

• The refrigerant then flows through the expansion valve and into the evaporator where it becomes low pressure.

• The low pressure refrigerant then returns to the compressor to start the cycle again.

The expansion valve operates on two pressures and temperatures - high and low.

• The expansion valve is responsible for regulating the flow of refrigerant into the evaporator.

• It operates on two pressures and temperatures - high and low.

• The high pressure and temperature are on the inlet side of the valve, while the low pressure and temperature are on the outlet side.

• The valve works by sensing the temperature and pressure o...read more