Senior Maintenance Technician Interview Questions and Answers

Refrigeration is a process of cooling a space or substance below the ambient temperature using a refrigerant and a compression cycle.

• Refrigeration is used in various applications such as air conditioning, food preservation, and industrial processes.

• The refrigeration cycle involves compression, condensation, expansion, and evaporation of a refrigerant.

• Compression: The refrigerant is compressed to increase its pressure and temperature.

• Condensation: The high-pressure refrigerant...read more

I have 10 years of working experience in the maintenance electrical field.

• 10 years of experience in maintenance electrical field

• Skilled in troubleshooting electrical systems

• Familiar with electrical codes and regulations

• Experience with repairing and maintaining electrical equipment

• Certified in electrical safety procedures

A miniature circuit breaker (MCB) is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

• MCBs are commonly used in residential and commercial electrical installations.

• They are designed to trip and cut off the power supply when there is an overload or short circuit in the circuit.

• MCBs come in various current ratings to suit different applications, such as 6A, 10A, 16A, etc.

• They are more compact a...read more

ELCB is a safety device used to prevent electric shock by detecting small leakage currents and disconnecting the power supply.

• ELCB stands for Earth Leakage Circuit Breaker.

• It works by detecting small leakage currents to earth and disconnecting the power supply to prevent electric shock.

• ELCBs are commonly used in electrical installations to provide an additional layer of safety.

• There are two types of ELCBs - voltage-operated ELCB and current-operated ELCB.

MCB is a type of electrical protection device that automatically switches off electrical circuits during abnormal conditions.

• MCB stands for Miniature Circuit Breaker

• It is a type of circuit breaker that automatically switches off electrical circuits when there is an overload or short circuit

• MCBs are commonly used in residential and commercial electrical installations

• They are designed to protect electrical circuits and prevent damage to electrical equipment

• MCBs are available in...read more

Equipment commonly used in a server room includes servers, racks, UPS systems, cooling units, and networking devices.

• Servers (e.g. rack servers, blade servers)

• Racks (e.g. server racks, network racks)

• UPS systems (Uninterruptible Power Supply)

• Cooling units (e.g. air conditioning units, precision cooling systems)

• Networking devices (e.g. switches, routers, firewalls)

LOTO (Lockout/Tagout) is used to prevent unexpected startup of machinery during maintenance, protecting workers from injury.

• LOTO ensures that equipment is completely shut off and cannot be restarted until maintenance is complete.

• Locks and tags are placed on energy isolation devices to indicate that maintenance is in progress.

• LOTO procedures must be followed to comply with OSHA regulations and prevent accidents.

• Examples: Locking out a circuit breaker before working on electric...read more