AUXMACH 2 FINAL EXAM REVIEW

Is Carbon dioxide Odorless Nonflammable and Colorless? (true or false)

The vapor tube connects the evaporator to which of the following?

4. R22 is a type of refrigerant that was completely phased out in 2020 . This type refrigerant belongs to which group of refrigerants?

5. In a refrigerant cycle, the flow of refrigerant is controlled by?

7. If a refrigeration compressor is running continuously without lowering the temperature in the refrigerated space, the trouble may be?

It is a refrigerant that has been used since the 1840's and considered to be a high-class refrigerant as its Ozone Depleting Properties and Global Warming Potential are Zero but was withdrawn from applications as it was considered to be hazardous?

What evaporator coil is used for storing frozen products and fresh food products?

What activates if pressure reaches the cut-out setting thereby opening the electrical circuit automatically and closes it again when it reaches cut-in setting?

12. The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such process is called?

What measures the amount of depletion to the Ozone Layer a refrigerant can cause?

Area at which the temperature is lower than the saturation temperature for the pressure range in question.

What part of the refrigerating system that ensures compressor lubricating oil is fed back directly to the crankcase and prevents oil circulating with the refrigerant?

It is describes as a temperature above the saturation temperature?

It is a measurement of how much heat a refrigerant trap in the atmosphere?

22. What is absolute pressure?

He refrigerant rejects heat when it travels through the ___________?

It is a procedure use in preventing liquid refrigerant from migrating back to the compressor when the systems is in an off cycle mode.

What could happen if there is a formation of frost on cooling coils in a refrigerator

It is the result of dividing the mass per unit volume?

34. Condensing temperature in a refrigerator is the temperature at which refrigerant becomes _____________?

The condition of refrigerant is high pressure saturated liquid before entering the _________________

It changes the state of refrigerant from being a superheated vapor to saturated and then to a subcooled liquid

It is an environmental effect a refrigerant have when it forms an explosive mixture when the concentration in air is between 16% to 25%

41. The current Refrigerants in Marine use such as R404A, R410a and R134a belongs to which group of Refrigerants?

It is an indication or measurement of the relative heat intensity of a body or a substance.

45. The refrigerant enters the metering device as________ ?

46. This is a type of refrigerant which is non-flammable, does not cause ozone depletion and very low toxicity index and available in large quantities at a low cost but has a low efficiency and high operating pressure.

It is a group of refrigerants which are harmless to the Ozone Layer and does not have any direct greenhouse effect but are highly flammable?

It is added to MARPOL Annex VI in 2011 to reduce GHG by at least 50% by 2050

What procedure is use when unwanted gases and moisture is removed from the refrigeration system?

It is a temperature below the saturation temperature

It is the ratio of perpendicular force to area or the stress at a point within a confined fluid

56. The bank of tubes at the back of domestic refrigerator are______?

It is the most important chemical properties of refrigerants. The refrigerant should be non-poisonous to humans and food stuff.

It is a compound that has the maximum ozone depletion potential in the atmosphere

60. The pressure at the inlet of a refrigerant compressor is called?

It is a part of the refrigerating system that prevents liquid refrigerant from flowing into the suction line and into the compressor.

64. In Fahrenheit, the boiling point of water is___________?

It is the result of dividing the volume per mass unit. It is the opposite of density.

An evaporator coil that is used for quickly storing products below freezing temperatures

What component keeps the refrigerant circulating through the system?

It is a part of the refrigerating system that acts as a storage for liquid refrigerant and ensures only liquid refrigerant is entering the expansion device

69. The condenser is found downstream after the______?

An evaporator coil that is used for storing products above freezing temperatures

It is a Group of Refrigerants which does not contain chlorine but still damage the environment because they are greenhouse gases

A disposing procedure that is use when a partial or complete refrigerant is removed from the system and later re-injected; or when the system is converted to run with a new refrigerant or when the equipment is dispose of

It describes the condition of a fluid at its boiling point

76. EEDI is the technical measure adopted by IMO to reduce __________.

It is a chemical property of refrigerants which must not have any reaction to materials used in Refrigeration Cycle

A Group of Refrigerants which is known to contribute to the greenhouse gas effect. The production of these ceased in 1994.

It is referred to dryness fraction or the state of a cooling medium

It controls the temperature inside the Ships Meat Room or Vegetable Room

It indicates the refrigerants various thermodynamic states

MARPOL Annex VI Prevention of Air Pollution from Ships was entered into force on what date?

It is the sum of the internal energy and the product of the pressure and volume of a thermodynamic system

The refrigerant exits the compressor as high pressure, high temperature _______?

It is a part of the refrigerating system that maintains the internal cleanliness that traps impurities such as dirt, water or moisture

It is an example of Chlorofluorocarbons that has been banned from being use since the 90s

It is the area at which the refrigerant can change from liquid to gas and vice versa

It is the area at which the refrigerant cannot be condensed, no matter how high the pressure.

It is the quantity of heat absorbed or released by a substance undergoing a change of state such as ice changing to water at constant temperature and pressure

It allows the refrigerant to lower in pressure, expand, and lower in temperature