10+ 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

Refrigeration is the process of removing heat from an enclosed space to lower the temperature below the ambient level.

• Refrigeration involves the use of refrigerants to absorb and release heat.

• It relies on the principles of compression, condensation, expansion, and evaporation.

• Common examples of refrigeration systems include refrigerators, air conditioners, and freezers.

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

An RCCB (Residual Current Circuit Breaker) is a device designed to quickly disconnect a circuit when it detects an imbalance in the flow of electricity, which could indicate a fault or leakage current.

• RCCBs are also known as residual-current devices (RCDs) or ground fault circuit interrupters (GFCIs).

• They are commonly used in electrical installations to provide protection against electric shock.

• RCCBs work by continuously monitoring the current flowing through the live and neu...read more

The suction pressure of refrigerant 134a is typically around 25-40 psi.

• Suction pressure of refrigerant 134a is influenced by factors such as temperature, system design, and load conditions.

• Normal suction pressure for refrigerant 134a in a typical HVAC system ranges from 25 to 40 psi.

• Low suction pressure may indicate issues such as low refrigerant charge or a problem with the compressor.

• High suction pressure could be a sign of a dirty evaporator coil or a restriction in the re...read more

The question is unclear and seems to be asking about the number of available checks for a specific purpose.

• Ask for clarification on what 'DG' and '4chek' refer to

• Provide information on the types of checks available in the context of maintenance technician role

• Offer examples of common checks performed in maintenance tasks

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