Balmer Lawrie Technician Interview Questions and Answers

Sharp corners are avoided in casting to prevent stress concentration and improve the overall strength and quality of the casting.

• Sharp corners can lead to stress concentration, which can cause cracks or failure in the casting.

• Rounded corners distribute stress more evenly, reducing the likelihood of defects.

• Sharp corners can also create difficulties during the casting process, such as mold filling and solidification iss...read more

A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary coils, which are wrapped around a magnetic core.

• When an AC voltage is applied to the primary coil, it creates a magne...read more

The type of breaker used depends on the electrical load and the circuit requirements.

• The most common types of breakers are standard, AFCI, GFCI, and dual-function.

• Standard breakers are used for general-purpose circuits.

• AFCI breakers are used for circuits that power bedrooms and living rooms.

• GFCI breakers are used for circuits that power bathrooms, kitchens, and outdoor areas.

• Dual-function breakers combine AFCI and GFCI...read more

Conductors are materials that allow electricity to flow through them. There are different types of conductors used in electrical systems.

• Copper is the most commonly used conductor in electrical wiring

• Aluminum is also used as a conductor, especially in high voltage power transmission

• Silver is the best conductor, but it is too expensive for most applications

• Gold is also a good conductor, but it is even more expensive tha...read more

MCB is a miniature circuit breaker while MCCB is a molded case circuit breaker.

• MCB is used for low current applications while MCCB is used for high current applications.

• MCB is rated up to 100 amps while MCCB can be rated up to 2500 amps.

• MCCB has adjustable trip settings while MCB does not.

• MCCB is more expensive than MCB.

• Examples of MCB brands include Legrand and Schneider while examples of MCCB brands include Siemens a

Safety is the state of being free from harm or danger.

• Safety involves identifying and assessing potential hazards

• It requires taking measures to prevent accidents and injuries

• It involves following established safety protocols and procedures

• Safety also includes being prepared for emergencies and knowing how to respond

• Regular training and education on safety practices is crucial

RS 485 is a multi-point communication standard while RS 232 is a point-to-point communication standard.

• RS 485 supports up to 32 devices on a single bus while RS 232 only supports two devices.

• RS 485 uses differential signaling for noise immunity while RS 232 uses single-ended signaling.

• RS 485 can transmit data over longer distances than RS 232.

• RS 485 is commonly used in industrial automation and control systems while RS

Protocol is a set of rules and guidelines that govern the communication between devices or systems.

• Protocols ensure that devices or systems can communicate with each other effectively and efficiently.

• They define the format, timing, sequencing, and error checking of messages exchanged between devices or systems.

• Examples of protocols include TCP/IP, HTTP, FTP, and SMTP.

• Protocols can be implemented in hardware, software, ...read more

PLC stands for Programmable Logic Controller. It is a digital computer used for automation of electromechanical processes.

• PLC is used in industrial automation to control machinery and processes.

• It is programmed using ladder logic or other programming languages.

• PLC can be used in various applications such as manufacturing, transportation, and energy.

• Examples of PLC brands include Siemens, Allen-Bradley, and Mitsubishi.

• P...read more

There are several types of PLCs, including modular, compact, rack-mounted, and software-based PLCs.

• Modular PLCs are designed to be expandable and customizable.

• Compact PLCs are smaller and more cost-effective than modular PLCs.

• Rack-mounted PLCs are designed to be mounted in a standard equipment rack.

• Software-based PLCs run on a computer and use specialized software to emulate a physical PLC.

• Other types of PLCs include s...read more