10+ Juaristi Interview Questions and Answers

Tests done during maintenance of a power transformer

• Insulation resistance test

• Turns ratio test

• Winding resistance test

• Oil quality test

• Partial discharge test

• Visual inspection

Speed of an EOT crane can be controlled by changing the voltage or frequency of the power supply.

• By changing the voltage or frequency of the power supply, the speed of the EOT crane can be controlled.

• This can be achieved by using a transformer to change the voltage or a generator to change the frequency.

• However, this method is not as efficient as using a VFD.

• Another option is to use a mechanical system such as a gearbox to control the speed.

• This method is also not as efficien...read more

RTD stands for Resistance Temperature Detector. It is a type of temperature sensor.

• RTD measures temperature by detecting the change in resistance of a metal wire as the temperature changes.

• The most common types of RTD are platinum, nickel, and copper.

• Platinum RTDs are the most accurate and have the widest temperature range (-200°C to 850°C).

• Nickel RTDs have a smaller temperature range (-80°C to 260°C) but are less expensive than platinum RTDs.

• Copper RTDs have the smallest tem...read more

To test id run in a VFD, measure the current and voltage at the motor terminals.

• Measure the current and voltage at the motor terminals using a multimeter.

• Compare the measured values with the rated values of the motor.

• Ensure that the VFD is properly programmed and configured for the motor.

• Check for any abnormal noise or vibration from the motor during operation.

• Perform a visual inspection of the motor and VFD for any signs of damage or overheating.

VCB maintenance procedures involve regular inspection, cleaning, lubrication, and testing.

• Inspect the VCB for any signs of damage or wear.

• Clean the VCB and its components regularly to prevent dust and dirt buildup.

• Lubricate moving parts to ensure smooth operation.

• Test the VCB regularly to ensure it is functioning properly.

• Follow manufacturer's guidelines and safety procedures.

• Keep records of maintenance and repairs.

• Train personnel on proper VCB maintenance procedures.

A fluid coupling is a device used to transmit rotational power between two shafts without direct mechanical connection.

• Fluid coupling uses hydraulic fluid to transmit torque.

• It consists of an impeller, turbine, and a fluid medium.

• The impeller is connected to the input shaft and the turbine to the output shaft.

• When the impeller rotates, it creates a flow of fluid which in turn rotates the turbine.

• The fluid coupling allows for smooth start-up and gradual acceleration of the dri...read more

Coupling refers to the degree of interdependence between software modules.

• Coupling can be classified as tight or loose.

• Tight coupling means modules are highly dependent on each other.

• Loose coupling means modules have minimal dependencies.

• Types of coupling include data coupling, stamp coupling, control coupling, etc.

• Data coupling occurs when modules share data through parameters or global variables.

• Stamp coupling occurs when modules share a composite data structure.

• Control cou...read more

An EOT crane, or Electric Overhead Traveling crane, is a type of crane that is operated by electricity and runs along tracks mounted on the ceiling of a facility.

• EOT cranes are commonly used in industrial settings for lifting and moving heavy loads.

• They are equipped with a hoist that can move horizontally along the crane's bridge beam.

• EOT cranes are controlled by an operator using a pendant control or a cabin control.

• These cranes are essential for efficient material handling ...read more

Short Message Service

• SMS stands for Short Message Service

• It is a text messaging service component of phone, web, or mobile communication systems

• SMS messages are limited to 160 characters

• Examples: 'Hello, how are you?' or 'Don't forget to buy milk.'