Dcm Architects Electrician Interview Questions and Answers

Initial data required to build a Gear box

• Design specifications and requirements

• Type of gear system (e.g. spur, helical, bevel, etc.)

• Power and torque requirements

• Gear ratios and speed requirements

• Material selection for gears and housing

• Lubrication system design

• Manufacturing and assembly processes

• Quality control and testing procedures

The material chosen for the shaft and gear depends on factors such as load, speed, and operating conditions.

• Consider the load and speed requirements of the shaft and gear.

• Evaluate the operating conditions, such as temperature and corrosion resistance.

• Common materials for shafts include steel, stainless steel, and titanium.

• Common materials for gears include steel, cast iron, and bronze.

• The material selection should ensu...read more

There are three types of protection in a transformer.

• The three types of protection are overload protection, overcurrent protection, and overvoltage protection.

• Overload protection protects the transformer from excessive heat caused by too much current.

• Overcurrent protection protects the transformer from damage caused by excessive current.

• Overvoltage protection protects the transformer from damage caused by excessive vol...read more

The 4 protection devices for an oil type transformer are Buchholz relay, pressure relief valve, oil level indicator, and winding temperature indicator.

• Buchholz relay detects gas accumulation and oil level changes

• Pressure relief valve releases excess pressure to prevent explosion

• Oil level indicator monitors oil level to prevent damage to transformer

• Winding temperature indicator measures temperature to prevent overheatin

MPCB stands for Motor Protection Circuit Breaker.

• MPCB is an electrical device used to protect motors from overloading, short circuits, and phase failures.

• It is a combination of a circuit breaker and a contactor.

• MPCBs are commonly used in industrial and commercial applications.

• They are available in different sizes and ratings depending on the motor's power and voltage requirements.