DIVI'S Laboratories Interview Questions and Answers

Parameters checked in installation of reactor mech seal include alignment, clearance, pressure, and temperature.

• Alignment of the seal with the shaft and other components is crucial for proper functioning.

• Clearance between the seal faces should be within specified limits to prevent leakage.

• Pressure conditions should be monitored to ensure the seal can withstand the operating conditions.

• Temperature limits should be considered to prevent seal damage or failure.

• Other parameters m...read more

Glass line thickness can be checked using ultrasonic thickness gauges.

• Ultrasonic thickness gauges use high-frequency sound waves to measure the thickness of materials.

• The gauge is placed on the glass surface and sends sound waves through the glass.

• The time taken for the sound waves to bounce back is measured and used to calculate the thickness of the glass.

• The thickness can be compared to the required specifications to ensure it meets the standards.

• Regular checks should be pe...read more

An ejector system is used to create a vacuum by using a high-pressure fluid to entrain a low-pressure fluid.

• The ejector system consists of a motive fluid nozzle, a suction chamber, and a diffuser.

• The motive fluid is usually steam or compressed air.

• The suction chamber is where the low-pressure fluid is entrained and mixed with the motive fluid.

• The diffuser is where the mixed fluid expands and the pressure decreases, creating a vacuum.

• Ejector systems are commonly used in refrig...read more

NPSH is the Net Positive Suction Head required to avoid cavitation in a pump. It can be checked using a formula or a graph.

• NPSH is the minimum pressure required at the suction side of the pump to avoid cavitation.

• It is calculated using the formula NPSH = (P1 - P2)/ρg - h1 - h2, where P1 is the pressure at the pump suction, P2 is the vapor pressure of the fluid, ρ is the fluid density, g is the acceleration due to gravity, h1 is the height of the fluid above the pump suction, ...read more

Spark testing can be checked by using a spark tester to measure the strength and consistency of the spark.

• Use a spark tester to check the strength and consistency of the spark

• Ensure that the spark is strong and consistent across all cylinders

• Check for any irregularities or abnormalities in the spark pattern

• Compare the results to manufacturer specifications

• Make any necessary adjustments or repairs to improve the spark performance