Pon Pure Chemical Interview Questions and Answers

The procedure for lift installation involves several steps including site preparation, equipment delivery, installation of guide rails and car frame, electrical and mechanical connections, and testing.

• Site preparation including excavation and foundation work

• Delivery of equipment including guide rails, car frame, and lift machinery

• Installation of guide rails and car frame

• Electrical and mechanical connections including wiring and control systems

• Testing and commissioning of the ...read more

Safety devices on transformers protect against overloading and overheating.

• Safety devices include fuses, circuit breakers, and thermal protectors.

• Fuses are designed to melt and break the circuit when the current exceeds a certain level.

• Circuit breakers trip and open the circuit when the current exceeds a certain level.

• Thermal protectors sense the temperature and disconnect the transformer when it exceeds a certain level.

• These devices prevent damage to the transformer and ensu...read more

Verify contractor bill by checking quantities, rates, and work done.

• Check quantities of materials used

• Verify rates charged for each item

• Ensure work done matches the bill

• Compare bill with contract terms

• Check for any discrepancies or errors

• Request supporting documents if necessary

Transformers are of two types - Step-up and Step-down. Step-up transformers increase voltage while Step-down transformers decrease voltage.

• Step-up transformers are used in power plants to increase voltage for transmission over long distances.

• Step-down transformers are used in households to decrease voltage for safe use.

• Other types of transformers include isolation transformers, autotransformers, and instrument transformers.

• Isolation transformers are used to isolate a circuit ...read more

Conductor load carrying capacity refers to the maximum amount of electrical current that a conductor can safely carry without overheating or causing damage.

• The load carrying capacity of a conductor depends on its size, material, and insulation.

• The National Electrical Code (NEC) provides tables and formulas to calculate the maximum current a conductor can carry.

• Factors such as ambient temperature, installation method, and voltage drop also affect the load carrying capacity of ...read more