Godrej Jersey Instrument Engineer Interview Questions and Answers

The amount of amps a 30 kW motor takes depends on the voltage it is operating at.

• The formula to calculate amps is: Amps = kW / (Volts * 1.73)

• For example, a 30 kW motor operating at 480 volts would take approximately 36 amps

• Higher voltage motors will draw fewer amps compared to lower voltage motors

Vernier caliper is a precision measuring tool used to measure internal and external dimensions with high accuracy.

• Ensure the jaws are clean and free from debris before use

• Close the jaws and check if the zero error is present, if so, adjust accordingly

• Place the object to be measured between the jaws and gently close them to get a reading

• Read the main scale value and the vernier scale value to get the final measurement

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Types of belts include V-belts, timing belts, flat belts, and ribbed belts.

• V-belts are commonly used in industrial applications and have a trapezoidal cross-section.

• Timing belts have teeth on the inner side to prevent slipping and are used in engines and machinery.

• Flat belts are flexible and used in conveyor systems and power transmission.

• Ribbed belts have longitudinal ribs on the inner side for better grip and are use

Friction is the force that resists the relative motion or tendency of such motion of two surfaces in contact.

• Friction is caused by the roughness of surfaces in contact.

• It acts in the opposite direction of the applied force.

• Friction can be static (when the object is at rest) or kinetic (when the object is in motion).

• Examples include the friction between tires and the road, or between a screw and a nut.

Types of maintenance include preventive, predictive, corrective, and proactive maintenance. Each type requires different strategies to effectively manage and address maintenance issues.

• Preventive maintenance involves regularly scheduled inspections and tasks to prevent breakdowns (e.g. changing air filters in HVAC systems)

• Predictive maintenance uses data and analytics to predict when equipment will fail and schedule ma...read more

My expected CTC is negotiable based on the job responsibilities, company size, and location.

• Consider the job responsibilities and required skills when determining expected CTC

• Research industry standards and average salaries for similar positions in the area

• Be prepared to discuss benefits, bonuses, and other compensation packages during negotiations

Erection and commissioning of a pneumatic compressor involves assembling the components, connecting the necessary piping, testing for functionality, and fine-tuning for optimal performance.

• Assemble the components of the pneumatic compressor according to the manufacturer's instructions.

• Connect the necessary piping for air intake, compression, and output.

• Test the compressor for functionality by running it empty and check...read more

Blowdown of cooling tower can be calculated using cycles of concentration. Maintenance practices include regular cleaning, inspection, and water treatment. Cooling tower capacity can be calculated based on heat load and design parameters.

• Calculate blowdown using cycles of concentration formula: Blowdown = Evaporation Loss / (Cycles of Concentration - 1)

• Maintenance practices include regular cleaning of cooling tower fil...read more

RCM stands for Reliability Centered Maintenance, a proactive maintenance strategy focused on identifying and preventing equipment failures.

• RCM is a systematic approach to maintenance planning that aims to optimize maintenance tasks to ensure equipment reliability.

• It involves analyzing the functions and potential failure modes of equipment to determine the most effective maintenance strategies.

• RCM prioritizes maintenanc...read more

Pumps can be classified based on their casings as follows: volute casing, axial split casing, and radial split casing.

• Volute casing pumps have a spiral-shaped casing that gradually expands to the discharge outlet.

• Axial split casing pumps have a casing split along the horizontal centerline of the pump.

• Radial split casing pumps have a casing split along the vertical centerline of the pump.

Air compressor works by compressing air to increase its pressure and decrease its volume.

• Air is drawn into the compressor through an intake valve.

• The air is then compressed using a piston or rotating impeller.

• Compressed air is stored in a tank or released directly for use.

• Examples of air compressors include reciprocating, rotary screw, and centrifugal compressors.

Maintenance work includes preventive, corrective, and predictive maintenance to ensure optimal performance of equipment and facilities.

• Preventive maintenance involves routine inspections, cleaning, and replacement of parts to prevent breakdowns and extend equipment life.

• Corrective maintenance involves repairing equipment after a breakdown or malfunction.

• Predictive maintenance involves using data and analytics to predic...read more