Assignment 1

What type of sound waves do ultrasonic leak detectors detect?

• Low-frequency

• Infrasonic

• Ultraviolet

• High-frequency

Which method involves pressurizing the refrigeration system and monitoring for pressure drops to indicate leaks?

• Visual leak detection

• Electronic detection

• Pressure testing

• Ultrasonic detection

What method involves injecting a fluorescent dye into the refrigeration system and using a UV lamp to make leaks visible?

• Electronic detection

• Ultrasonic detection

• Pressure testing

• Fluorescent Detectors

What is the primary advantage of bubble testing for refrigerant leak detection?

• High sensitivity

• Non-invasive nature

• Quick response time

• Low cost

What is a limitation of pressure testing for refrigerant leak detection?

• Limited sensitivity

• High cost

• Requirement for specialized equipment

• Environmental impact

Which refrigerant leak detection method is known for its high sensitivity and ability to detect small leaks?

• Ultrasonic

• Bubble testing

• Visual

• Electronic

What principle do electronic leak detectors operate on?

• Ultrasonic sound waves

• Changes in electrical conductivity

• Pressure differentials

• Chemical reactions

What principle does visual leak detection rely on to make leaks visible?

• Changes in electrical conductivity

• Pressure differentials

• Fluorescence under UV light

• Sound waves

In which compressor type does gas compression occur through a continuous rotary motion?

• A)Reciprocating compressor

• B) Diaphragm compressor

• C) Rotary vane compressor

• D) Axial compressor

Which compressor type is commonly used in household refrigerators and air conditioners due to its compact size and efficiency?

• A) Centrifugal compressor

• B) Scroll compressor

• C) Rotary screw compressor

• D) Diaphragm compressor