Refrigeration System Equipment Quiz

What is the function of the condenser in a refrigeration system?

Where does the liquid refrigerant from the expansion device enter?

What is the primary function of an evaporator in a refrigeration system?

Which equipment is responsible for dividing the high pressure side and low pressure side of a refrigeration system?

What does a refrigerant compressor do in a refrigeration system?

Where is the expansion device usually located in a refrigeration system?

What type of compressor is best suited for refrigerants requiring relatively small displacement and operating at high pressure?

Which type of compressor is ideal for handling refrigerants with large displacement and low condensing pressure?

The rotary compressor is primarily used in which type of appliances?

What type of compressors utilize the back and forth motion of a piston to compress refrigerant?

Which diagram shows the clearance volume of a reciprocating compressor?

What is the term defined in positive displacement compressors to account for the difference between the in-built displacement and actual pumped volume?

What does the clearance factor in reciprocating compressors represent?

Which parameter is normally provided as clearance in reciprocating compressors?

What does the gas trapped in the clearance space do during operation of reciprocating compressors?

What phenomenon occurs in centrifugal compressors when the load decreases to below 35% of its rated capacity?

How can the capacity of a centrifugal compressor be controlled?

What is one reason for employing a large diameter impeller or high rpm in centrifugal compressors?

What does surging in centrifugal compressors lead to?

What is the purpose of varying the gas pressure in a centrifugal compressor?

Why are rotary compressors used in low-temperature fields like chemical processing and cold storages?

What is the key feature of rotary compressors that allows them to have high volumetric efficiencies?

What happens to the seal between high-pressure and low-pressure sides when a rotary compressor stops?

What is the role of oil in rotary compressors?

What is one method used to control the capacity of centrifugal compressors?

What is the main function of a condenser in a refrigeration system?

How do air-cooled condensers differ from water-cooled condensers?

What type of movement is responsible for air circulation over natural convection condenser tubes?

What is injected into a screw compressor to eliminate leakage and serve the purpose of cooling and lubricating?

Which rotor in a rotary screw compressor is normally the driving rotor?

How does a slide valve in a screw compressor contribute to capacity control?

What type of refrigerants are typically used in positive displacement machines like screw compressors?

What distinguishes a screw compressor from reciprocating compressors in terms of surging problems?

What type of tubes are used for ammonia condensers to prevent the negative effects of ammonia on copper?

What feature is added to the holes in the tube sheets of water-cooled condensers to prevent tubes from getting loose?

Why are removable water boxes provided at the ends of the condenser?

What does the bottom portion of the condenser serve as in some cases?

Why should care be taken not to overcharge the refrigeration system with the refrigerant?

What safety feature is fixed on the shell of the condenser to protect against excessive pressures?

What source of heat is used for vaporizing the water in evaporative condensers?

What problem is mentioned as the most troublesome point about evaporative condensers?

What happens if hard layers of dirt or scale form on the surface of the evaporative condenser coil?

What is a major issue mentioned in relation to overcharging a refrigeration system with refrigerant?

How is the liquid flow from the accumulator to the evaporator coil generally achieved?

What is the purpose of liquid eliminators provided in the accumulator top?

In a 'liquid-overfeed system', what is used to circulate the liquid from the accumulator to the evaporator coil?

What do the terms 'natural convection' and 'forced convection' describe in a refrigeration system?

What does a 'liquid-suction heat exchanger' do in a refrigeration system?

In what way does the vapor formed by the vaporization of liquid rise from the evaporator coil to the top of the accumulator?

What happens to the suction volume and volumetric efficiency as the suction pressure decreases?

What effect does pressure drop on the suction side have on the pressure inside the cylinder during the suction stroke?

How can overall volumetric efficiency be improved in a reciprocating compressor?

What is the main role of an impeller in a single-stage centrifugal compressor?

Which material is typically used for making the casing of a centrifugal compressor?

What type of diffuser is normally preferred for better part load operation in a centrifugal compressor?

Why is a natural convection condenser not capable of rejecting heat rapidly?

What is the purpose of welding wires to the condenser tubes in small refrigeration units?

Why are fins in forced-air circulation condenser coils closely spaced?

What is an advantage of shell-and-tube condensers over tube-in-tube condensers?

What is the purpose of providing a small gap between the plate-type condenser and the refrigerator cabinet?

Why are widely-spaced fins used in some natural convection condenser designs?

What is a disadvantage of tube-in-tube condensers compared to shell-and-coil condensers?

Why do fans or blowers play a crucial role in forced-air circulation condensers?

In small refrigeration units, why is steel generally preferred over copper in making condenser tubes?

What could be a potential issue if a natural convection condenser is placed near an oven or warm location?

What is the purpose of an evaporator in a cooling system?

What is the main difference between a dry expansion evaporator and a flooded evaporator?

How is the refrigerant state described in a direct expansion evaporator at the outlet?

What determines the heat-transfer efficiency of a flooded evaporator?

Which component is responsible for controlling the rate of flow of refrigerant in a dry expansion evaporator?

What leads to an increase in the liquid level in a flooded evaporator?

What distinguishes a 'dry-expansion' evaporator from a 'flooded' evaporator?

What happens to liquid refrigerant that vaporizes in a flooded evaporator?

Which factor contributes to the relatively larger refrigerant charge in flooded evaporators compared to dry-expansion evaporators?