40+ Trainee Technician Interview Questions and Answers

I am known for several problem solving documents.

• I have created and maintained problem solving documents for various technical issues.

• I am familiar with troubleshooting guides, FAQs, and knowledge base articles.

• I have experience in documenting solutions for software bugs, hardware malfunctions, and network problems.

• I have also collaborated with team members to create comprehensive problem solving resources.

• Examples: Troubleshooting guide for printer connectivity issues, FAQ d...read more

Capacitor, J-FET, MOS-FET & Transformer symbols and working principles.

• Capacitor symbol: two parallel lines with a space between them. It stores electrical charge.

• J-FET symbol: a gate connected to a channel. It controls the flow of current.

• MOS-FET symbol: a gate between two channels. It amplifies or switches electronic signals.

• Transformer symbol: two coils with a core. It transfers electrical energy from one circuit to another.

• Capacitor principle: stores energy in an electric...read more

The least count of vernier calipers is the smallest measurement that can be read on the scale.

• It is determined by the number of divisions on the vernier scale and the main scale

• It is usually expressed in millimeters or inches

• For example, a vernier caliper with 20 divisions on the vernier scale and 1mm on the main scale has a least count of 0.05mm

• It is important to consider the least count when taking measurements to ensure accuracy

Height gauge l.c is the smallest measurement that can be read on a height gauge. It is used to measure the height of objects.

• l.c stands for 'least count', which is the smallest measurement that can be read on a measuring instrument

• A height gauge is a tool used to measure the height of objects with high precision

• Height gauge l.c is important because it determines the accuracy of the measurement

• Height gauges are commonly used in manufacturing and engineering industries

Transformers are rated in kVA because it represents the total power capacity of the transformer, taking into account both voltage and current.

• kVA takes into account both voltage and current, providing a more accurate representation of the transformer's power capacity

• kVA rating helps in determining the maximum load that the transformer can handle without overheating or malfunctioning

• kVA rating simplifies the comparison of different transformers based on their power capacity

• For...read more

Semiconductors use materials like silicon, germanium, gallium arsenide, and silicon carbide.

• Common materials used in semiconductors are silicon, germanium, gallium arsenide, and silicon carbide.

• These materials have unique electrical properties that make them suitable for use in electronic devices.

• Silicon is the most widely used semiconductor material due to its abundance and versatility.

• Gallium arsenide is often used in high-frequency applications, while silicon carbide is us...read more

The least count of a vernier caliper and dial gauge refers to the smallest measurement that can be accurately read on the instrument.

• The least count of a vernier caliper is typically 0.02 mm or 0.001 inch.

• The least count of a dial gauge is usually 0.01 mm or 0.001 inch.

• The least count is determined by the number of divisions on the main scale and the vernier scale of the instrument.

• For example, if a vernier caliper has 20 divisions on the main scale and 10 divisions on the ve...read more

Capacitor stores electrical energy in an electric field.

• Capacitor is an electronic component that stores electrical energy in an electric field.

• It consists of two conductive plates separated by a dielectric material.

• Capacitors are used in various electronic circuits for filtering, timing, tuning, and power conditioning.

• They are also used in power factor correction, motor starting, and energy storage applications.

• Examples of capacitors include ceramic, electrolytic, tantalum, ...read more

IC engine vehicles use combustion for power, while EVs rely on electric energy stored in batteries.

• IC engines burn fuel (e.g., gasoline, diesel) for power; EVs use electric motors powered by batteries.

• IC engine vehicles emit greenhouse gases; EVs produce zero tailpipe emissions.

• Maintenance for IC engines often involves oil changes and exhaust system checks; EVs require less maintenance due to fewer moving parts.

• Examples of IC engine vehicles include Ford Mustang and Toyota Co...read more

A major paint issue refers to a significant problem or defect in the application or quality of paint on a surface.

• Major paint issues can include peeling, cracking, blistering, or fading of paint.

• Improper surface preparation, low-quality paint products, or incorrect application techniques can lead to major paint issues.

• For example, if paint starts peeling off a wall within a short period of time after application, it indicates a major paint issue.

The least count of a vernier caliper is the smallest measurement it can accurately read, typically 0.02 mm or 0.01 mm.

• The least count is calculated as the difference between one main scale division and one vernier scale division.

• For a standard vernier caliper, the least count is often 0.02 mm (or 0.001 inches).

• Example: If the main scale has divisions of 1 mm and the vernier scale has 50 divisions that cover 49 mm, the least count is 0.02 mm.

• A smaller least count allows for mo...read more

Semiconductors are materials that have electrical conductivity between that of a conductor and an insulator.

• Semiconductors are used in electronic devices like transistors, diodes, and integrated circuits.

• Common semiconductor materials include silicon, germanium, and gallium arsenide.

• Semiconductors can be doped to change their electrical properties, such as adding impurities to increase conductivity.

Solar panels are devices that convert sunlight into electricity by using photovoltaic cells.

• Solar panels are made up of photovoltaic cells that capture sunlight and convert it into electricity.

• They are commonly used to generate renewable energy for residential, commercial, and industrial purposes.

• Solar panels are mounted on rooftops or in open fields to maximize exposure to sunlight.

• They are environmentally friendly and help reduce reliance on fossil fuels for electricity gen...read more

Air braking is a braking system used in vehicles that relies on compressed air to slow down or stop the vehicle. Types of wheels include steel wheels, aluminum wheels, and alloy wheels.

• Air braking uses compressed air to apply pressure to the brake pads or shoes, which then press against the wheels to slow down or stop the vehicle.

• Types of wheels include steel wheels, which are durable and cost-effective, aluminum wheels, which are lightweight and offer better fuel efficiency,...read more

PLC stands for Programmable Logic Controller, a digital computer used for automation of industrial processes.

• PLCs are used to control machinery on factory assembly lines.

• They can automate processes like mixing, packaging, and material handling.

• Example: A PLC can control the timing and sequence of a conveyor belt.

• PLCs are programmed using ladder logic or other programming languages.

• They are essential in industries like manufacturing, oil and gas, and water treatment.

A fuse is a safety device that protects electrical circuits by breaking the circuit when excessive current flows through it.

• Prevents overheating: Fuses stop electrical fires by breaking the circuit when current exceeds safe levels.

• Easy to replace: Once a fuse blows, it can be easily replaced, restoring functionality without complex repairs.

• Cost-effective: Fuses are inexpensive compared to circuit breakers, making them a popular choice for home and industrial use.

• Example: A 15...read more

LAN stands for Local Area Network, which is a computer network that connects devices within a limited area.

• LAN is a type of network that is used to connect devices within a limited area such as a home, office, or school.

• It allows devices to communicate with each other and share resources such as printers and files.

• LAN networks are typically faster and more secure than wide area networks (WANs) because they are confined to a smaller area.

• Examples of LAN technologies include Et...read more

To convert a 52cm wire into circular wire, we need to calculate the circumference and then divide it by pi to get the diameter.

• Calculate the circumference of the wire using the formula 2*pi*r, where r is the radius

• Divide the circumference by pi to get the diameter of the circular wire

• The formula for the diameter is d = c/pi, where d is the diameter and c is the circumference

• In this case, the length of the wire is given as 52cm, so we can calculate the radius and diameter acco...read more

Measuring instruments are tools used to quantify physical properties such as length, weight, temperature, and pressure.

• Measuring instruments are used to obtain accurate and precise measurements of physical quantities.

• Examples of measuring instruments include rulers, thermometers, scales, and pressure gauges.

• Measuring instruments can be analog or digital, and may require calibration to ensure accuracy.

• Measuring instruments are essential in many fields, including science, engin...read more

Clearance of punch refers to the gap between the punch and die in a punching operation.

• Clearance of punch is important for achieving accurate and clean cuts in a punching operation.

• The clearance should be set based on the material being punched and the thickness of the material.

• Too little clearance can result in a rough cut and damage to the punch and die, while too much clearance can result in burrs and a poor quality cut.

• For example, when punching a thin sheet of metal, a c...read more

A battery is a device that stores chemical energy and converts it into electrical energy to power electronic devices.

• Batteries come in various sizes and types, such as alkaline, lithium-ion, and lead-acid.

• They are commonly used in electronic devices like smartphones, laptops, and cars.

• Batteries consist of one or more cells that contain electrolytes and electrodes.

• When a battery is connected to a circuit, chemical reactions occur within the cells to produce electricity.

• Recharg...read more

1 cm equals 10,000 microns, as 1 micron is one-thousandth of a millimeter.

• 1 cm = 10 mm, and 1 mm = 1,000 microns.

• Therefore, 1 cm = 10 mm x 1,000 microns/mm = 10,000 microns.

• Microns are often used in fields like microscopy and materials science.

There are various types of gauges used in the field of engineering and technology.

• Pressure gauges

• Temperature gauges

• Flow gauges

• Level gauges

• Vacuum gauges

• Humidity gauges

• Force gauges

• Torque gauges

• Thickness gauges

• Dial gauges

• Digital gauges

The question is unclear. Please provide more context.

• Please provide more information about what gauges you are referring to.

• Are you asking about gauges in a specific industry or field?

• Without more context, it is impossible to answer this question accurately.

There are mainly three types of solar panels: monocrystalline, polycrystalline, and thin-film.

• Monocrystalline solar panels are made from single-crystal silicon and are known for their high efficiency.

• Polycrystalline solar panels are made from multiple silicon crystals and are more affordable but slightly less efficient than monocrystalline panels.

• Thin-film solar panels are made by depositing a thin layer of photovoltaic material onto a substrate and are lightweight and flexib...read more

Power generation involves converting mechanical energy into electrical energy through various methods such as steam turbines, hydroelectric dams, and wind turbines.

• Power generation involves the conversion of mechanical energy into electrical energy.

• Common methods of power generation include steam turbines, hydroelectric dams, and wind turbines.

• Steam turbines use steam to drive a generator, converting thermal energy into mechanical energy.

• Hydroelectric dams use the force of fl...read more

DC motors are electric motors that operate using direct current (DC) power sources.

• DC motors convert electrical energy into mechanical energy

• They have a rotating armature and a stationary field magnet

• Common types include brushed DC motors and brushless DC motors

• Used in various applications such as electric vehicles, robotics, and industrial machinery