Refrigeration Exam Questions And Answers links:
[FREE] Refrigeration Exam Questions And Answers
Posted on 27-Mar-2021
One ton is equal to the amount of heat required , Btu to melt one ton of ice in a hour period. A two-ton unit would be rated at 24, Btu per hour. What is BTU? The British thermal unit Btu or BTU is a traditional unit of heat; it is defined as the...
[ VIEW ANSWER ] [ Find Similar ]
[GET] Refrigeration Exam Questions And Answers | HOT!
Posted on 28-Mar-2021
What is Centralised Air System? The most common central cooling system is a split system, which includes an outdoor cabinet containing a condenser coil and compressor, and an indoor evaporator coil, usually installed in conjunction with your...
[ VIEW ANSWER ] [ Find Similar ]
HVAC Practice Exam
Posted on 24-Apr-2021
The Vapor-Compression Refrigeration Cycle is comprised of four steps. The gas releases heat into the hot reservoir because of the external work added to the gas. The refrigerant leaves as a high pressure liquid. What is Vapor Compression Cycle? Vapor-Compression Refrigeration or vapor-compression refrigeration system VCRS , in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air-conditioning of buildings and automobiles.
[ VIEW ANSWER ] [ Find Similar ]
HVAC Practice Test
Posted on 21-Mar-2021
Why is a Compressor used in Refrigeration? The compressor does exactly as its name says: it compresses the refrigerant. The compressor receives low pressure gas from the evaporator and converts it to high pressure gas. As mentioned earlier, as the gas is compressed, the temperature rises. The hot refrigerant gas then flows to the condenser.
[ VIEW ANSWER ] [ Find Similar ]
HVAC Questions & Answers
Posted on 21-Apr-2021
What is Auto Refrigeration? While the Energy Center usually tries to avoid the use of acronyms, HVAC is in common use in the heating and cooling industry. It stands for "heating, ventilation and air conditioning," three functions often combined into one system in today's modern homes and buildings. An HVAC engineer's job duties can include the design, installation, maintenance, and repair of heating, ventilation, air conditioning, cooling, and refrigeration systems.
[ VIEW ANSWER ] [ Find Similar ]
Hvac Test Questions And Answers Pdf
Posted on 2-May-2021
What is Psychometry? Psychometry is a psychic ability in which a person can sense or "read" the history of an object by touching it. What are the Types of Air Conditioning Systems? Types of Air Conditioning Systems The choice of which air conditioner system to use depends upon a number of factors including how large the area is to be cooled, the total heat generated inside the enclosed area, etc. Window Air Conditioner.
[ VIEW ANSWER ] [ Find Similar ]
Free HVAC Practice Tests
Posted on 7-Mar-2021
Incorrect answer. Please choose another answer. Air Conditioning Heat which causes a change in temperature of a substance is called: a. Any time there is a change of temperature indicated by the thermometer the heat level or intensity can easily be measured. In the writings of the early scientists who provided the foundations of thermodynamics, sensible heat had a clear meaning in calorimetric. What is heat, which causes a change in the state of a material without a change in temperature, called? Latent heat c. Superheat d. Regular heat Heat, which causes a change of state without a change in temperature, is known as latent heat.
[ VIEW ANSWER ] [ Find Similar ]
Top Refrigeration And Air Conditioning Question And Answers
Posted on 8-May-2021
An example of latent heat is water changing to ice or vice a versa. Latent heat is the heat released or absorbed by a body or a thermodynamic system during a process that occurs without a change in temperature. Commercial Air Conditioning What is a sling psychrometer used to measure? Wet and dry bulb temperature d. Barometric pressure A sling psychrometer is a device that consist of two thermometers fitted in a hinged bracket used for spinning the two thermometers. One of the bulbs is kept moist with distilled water on a sock or wick placed over the thermometer's tip. As the thermometers are rotated, evaporation of water from the wick lowers the temperature indicating a lower temperature than that of the dry-bulb thermometer.
[ VIEW ANSWER ] [ Find Similar ]
Refrigeration Basics Quiz Questions
Posted on 14-May-2021
This is the Wet bulb temperature which will be lower than the dry bulb and can never be above dry bulb measurement. The lower the relative humidity, the lower the wet bulb temperature. The difference in the two bulbs readings can be applied to a psychrometric chart to calculate relative humidity and other properties of air. A compressor is operating with a discharge pressure of What is the compression ratio pumping ratio? PSIG is converted to absolute by adding In this problem, discharge pressure Commercial Refrigeration 7. In a direct expansion evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: a. Direct type evaporators are designed to operate most efficiently with approximately 10 degrees superheat. In order to have superheat, all liquid must be boiled away before reaching the end of the evaporator.
[ VIEW ANSWER ] [ Find Similar ]
HVAC Interview Questions & Answers
Posted on 28-May-2021
Heat Pump Service What is the major difference between a heat pump and an air conditioner? Condenser c. Evaporator d. Reversing valve The reversing valve is the component that will reverse the flow of refrigerant when changing from air conditioning to heating. What device controls the supplementary electric heat according to the outdoor temperature? Auxiliary temperature control c. Outdoor ambient thermostat d. Indoor thermostat only To control energy, the heat pump will incorporate outdoor thermostats to limit the auxiliary heat before the balance point is reached. Heat Pump Installation Which of the following is not a factor that should be considered when installing an outdoor unit? Return air c. Sound transmission d. Snow fall When installing the outdoor unit the return air is not a factor in the installation; all of the other answers are factors involving installation.
[ VIEW ANSWER ] [ Find Similar ]
Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering
Posted on 4-May-2021
What is the minimum clearance for access panels on an outdoor condensing unit? One BTU is the quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit. What is the primary composition of natural gas? Electric Heat The electric heat element is usually made of what material? Copper with a brass coating b. Nickel with a cadmium coating c. Nickel and steel d. Nickel and chromium Heat elements are made of Ni-chrome which is nickel and chromium. They are combined to create a resistance wire. Which of the following is an example of a resistive load? Bimetal switch.
[ VIEW ANSWER ] [ Find Similar ]
Refrigeration Oral Questions
Posted on 12-Apr-2021
Two locations where a cold air return should be installed: a. Open area of wall and low to the ground. Behind appliances and high on the wall. Open area of wall and high on the wall. Behind appliances and low to the ground. Incorrect answer. Please choose another answer. Which of the following is a law of thermodynamics: a. Heat is a form of matter. Heat moves toward a place with higher intensity. Heat moves toward a place with lower intensity. Heat moves toward a place with a higher temperature. How fast heat will travel. The quantity of heat. The volume of heat. How hot something feels. The temperature of heat in a substance. The quantity of heat in a substance.
[ VIEW ANSWER ] [ Find Similar ]
Multiple Choice Questions With Answers On Refrigeration And Air-Conditioning - Set 07
Posted on 18-May-2021
The velocity of heat in a substance. The heat potential of a substance. Degrees Celsius, F ahrenheit and Kelvin b. International System of Units c. British Thermal Units d. Board of Trade Unit Incorrect answer. If 1 pound of water warms to 60 degrees F from 55 degrees F, what btu of latent heat will it have absorbed?
[ VIEW ANSWER ] [ Find Similar ]
Exam Preparation Help (Links)
Posted on 20-Mar-2021
Ans: d 5. Ammonia-absorption refrigeration cycle requires a very little work input b maximum work input c nearly same work input as for vapour compression cycle d zero work input e none of the above. Ans: a 6. Ans: a 8. Clapeyron equation is a relation between a temperature, pressure and enthalpy b specific volume and enthalpy c temperature and enthalpy d temperature, pressure, and specil volume e temperature, pressure, specific volur and'enthalpy. Ans: e Clapeyron equation is applicable for registration at a saturation point of vapour b saturation point of liquid c sublimation temperature d triple point e critical point. Ans: a In vapour compression cycle, the conditii of refrigerant is saturated liquid a after passing through the condenser b before passing through the condensei c after passing through the expansion throttle valve d before entering the expansion valve e before entering the compressor.
[ VIEW ANSWER ] [ Find Similar ]
Epa 608 Test Questions And Answers Pdf
Posted on 1-Apr-2021
In vapour compression cycle, the condition of refrigerant is very wet vapour a after passing through the condenser b before passing through the condenser c after passing through the expansion or throttle valve d before entering the expansion valve e before entering the compressor. In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid a after passing through the condenser b before passing through the condenser c after passing through the expansion or thiottle valve d before entering the expansion valve e before entering the compressor.
[ VIEW ANSWER ] [ Find Similar ]
Air Conditioning Questions And Answers Pdf
Posted on 19-May-2021
Ans: d In vapour compression cycle the condition of refrigerant is superheated vapour a after passing through the condenser b before passing through the condenser c after passing through the expansion or throttle valve d before [entering the expansion valve e before entering the compressor. Ans: b In vapour compression cycle the condition off refrigerant is dry saturated vapour a after passing through the condenser b before passing through the condenser c after passing through the expansion or throttle valve d before entering the expansion valve e before entering the compressor.. Allowable pressure on high-pressure side or ammonia absorption system is of the order of a atmospheric pressure b slightly above atmospheric pressure c bars d bars e bars.
[ VIEW ANSWER ] [ Find Similar ]
Refrigeration And Air-Conditioning Question Answer In English (11-20)
Posted on 13-Mar-2021
Ans: d The moisture in a refrigerant is removed by a evaporator b safety relief valve c dehumidifier d driers e expansion valve Ans: d The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, a will be higher b will be lower c will remain unaffected d may be higher or lower depending upon the nature of non-condensable gases e unpredictable.
[ VIEW ANSWER ] [ Find Similar ]
Refrigeration & Air-Conditioning MCQ Question With Answer
Posted on 12-Apr-2021
Critical pressure of a liquid is the pressure a above which liquid will remain liquid b above which liquid becomes gas c above which liquid becomes vapour d above which liquid becomes solid e at which all the three phases exist together. Critical temperature is' the temperature above which a a gas will never liquefy b a gas will immediately liquefy c water will evaporate d water will never evaporate e none of the above. In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is a less than 2 kg b more than or equal to 3. Absorption system normally uses the following refrigerant a Freon b Freon c C02 d S02 e ammonia. One of the purposes of sub-cooling the liquid refrigerant is to a reduce compressor overheating b reduce compressor discharge temperature c increase cooling effect d ensure that only liquid and not the vapour enters the expansion throttling valve e none of the above.
[ VIEW ANSWER ] [ Find Similar ]
TOP 95+ Refrigeration And Air Conditioning Multiple Choice Questions And Answers
Posted on 23-Mar-2021
The value of COP in vapour compression cycle is usually a always less than unity b always more than unity c equal to unity d any one of the above e none of the above. In a refrigeration system, heat absorbed in comparison to heat rejected is a more b less c same d more for small capacity and less for high capacity e less for small capacity and more for high capacity. In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to a collect liquid refrigerant and prevent it from going to compressor b detect liquid in vapour c superheat the vapour d collect vapours e increase refrigeration effect. The leaks in a refrigeration system using Freon are detected by a halide torch which on detection produces greenish flame lighting b sulphur sticks which on detection gives white smoke c using reagents d smelling e sensing reduction in pressure. Pick up the wrong statement. A refrigerant should have a Tow specific heat of liquid b high boiling point c high latent heat of vaporisation d higher critical temperature e low specific volume of vapour.
[ VIEW ANSWER ] [ Find Similar ]
MARINE ENGINEERING KNOWLEDGE BY RAJAN - Refrigeration Oral Questions
Posted on 28-Mar-2021
Ans: b 2. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of kg of ice a Condensing temperature in a refrigerator is the temperature a of cooling medium b of freezing zone c of evaporator d at which refrigerant gas becomes liquid e condensing temperature of ice. Formation of frost on evaporator in refrigerator a results in loss of heat due to poor heat transfer b increases heat transfer rate c is immaterial d can be avoided by proper design e decreases compressor power. The Cannot coefficient of performance of cycle will be Which of the following is not a desirable property of a refrigerant a high triiscibility with oil b low boiling point c good electrical conductor d large latent heat e non-inflammable.
[ VIEW ANSWER ] [ Find Similar ]
Refrigerant Machine Operator Certification Practice Test
Posted on 11-Apr-2021
Ans: c In vapour compression refrigeration system, refrigerant occurs as liquid between a condenser and expansion valve b compressor and evaporator c expansion valve and evaporator d compressor and condenser e none of the above. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system a strong solution to weak solution b weak solution to strong solution c strong solution to ammonia vapour d ammonia vapour to weak solution e ammonia vapour to strong solution. Ans: b If the-cycle direction be reversed, what will be the value of COP of the above.
[ VIEW ANSWER ] [ Find Similar ]
Additive Manufacturing Mcq Questions And Answers Pdf
Posted on 20-May-2021
The domestic refrigerator uses following type of compressor Domestic refrigerator working on vapour compression cycle uses the following type of expansion device a electrically operated throttling valve b manually operated valve Air refrigeration cycle is used in a domestic refrigerators b commercial refrigerators c air conditioning d gas liquefaction e such a cycle does not exist. In a vapour compression cycle, the refrigerant immediately after expansion valve isAns: a The refrigerant for a refrigerator should have a high sensible heat b high total heat c high latent heat d low latent heat e low sensible heat Ans: c Rating of a domestic refrigerator is of the order of a 0. Ans: a a centrifugal b axial c miniature sealed unit d piston type reciprocating e none of the above.
[ VIEW ANSWER ] [ Find Similar ]
Hvac Test Questions And Answers
Posted on 26-Mar-2021
Presence of moisture in a refrigerant affects the working of a compressor b condenser c evaparator d expansion valve. Refrigeration in aeroplanes usually employs the following refrigerant a Co2 b Freon c Freon d Air e none of the above. Ans: d c thermostatic valve d capillary tube e expansion valve. Air refrigeration operates on a Carnot cycle b Reversed Carnot cycle c Rankine cycle d Erricson cycle e Brayton cycle. Ans: e a liquid b sub-cooled liquid c saturated liquid d wet vapour e dry vapour.
[ VIEW ANSWER ] [ Find Similar ]
HVAC Controls Practice Test Results
Posted on 14-May-2021
The vapour pressure of refrigerant should be a lower than atmospheric pressure b higher than atmospheric pressure c equal to atmospheric pressure d could be anything e none of the above. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be a small b high c euqal d anything e under some conditions small and under some conditions high. The bank of tubes at the back of domestic refrigerator are a condenser tubes b evaporator tubes c refrigerant cooling tubes d capillary tubes e throttling device. The higher temperature in vapour compression cycle occurs at a receiver b expansion valve c evaporator d condenser discharge e compressor discharge.
[ VIEW ANSWER ] [ Find Similar ]
70 Question & Answers For HVAC Engineer Interview - PDF
Posted on 22-Mar-2021
Highest temperature encountered in refrigeration cycle should be a near critical temperature of refrigerant b above critical temperature c at critica. The refrigerant used is Aqua ammonia is used as refrigerant in the following type of refrigeration system If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h. In a refrigeration cycle, the flow of refrigerant is controlled by Where does the lowest temperature occur in a vapour compression cycle? Ans: b a compression b direct c indirect d absorption e none of the above. Ans: d required will be a same b more c less d a compressor b condenser c evaporator d expansion valve e all of the above.
[ VIEW ANSWER ] [ Find Similar ]
HVAC Practice Exam ( Current). Explained Answers & Instant Scoring.
Posted on 4-Apr-2021
Incorrect answer. Please choose another answer. Air Conditioning Heat which causes a change in temperature of a substance is called: a. Any time there is a change of temperature indicated by the thermometer the heat level or intensity can easily be measured. In the writings of the early scientists who provided the foundations of thermodynamics, sensible heat had a clear meaning in calorimetric. What is heat, which causes a change in the state of a material without a change in temperature, called? Latent heat c. Superheat d. Regular heat Heat, which causes a change of state without a change in temperature, is known as latent heat. An example of latent heat is water changing to ice or vice a versa. Latent heat is the heat released or absorbed by a body or a thermodynamic system during a process that occurs without a change in temperature.
[ VIEW ANSWER ] [ Find Similar ]
(PDF) Top Refrigeration And Air Conditioning Question And Answers | Sanket Gandhi - 1medicoguia.com
Posted on 12-May-2021
This is the Wet bulb temperature which will be lower than the dry bulb and can never be above dry bulb measurement. The lower the relative humidity, the lower the wet bulb temperature. The difference in the two bulbs readings can be applied to a psychrometric chart to calculate relative humidity and other properties of air. A compressor is operating with a discharge pressure of What is the compression ratio pumping ratio?
[ VIEW ANSWER ] [ Find Similar ]
Refrigeration Basics Quiz Questions | HVAC Certification Practice Tests
Posted on 25-Apr-2021
PSIG is converted to absolute by adding In this problem, discharge pressure Commercial Refrigeration 7. In a direct expansion evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: a. Direct type evaporators are designed to operate most efficiently with approximately 10 degrees superheat. In order to have superheat, all liquid must be boiled away before reaching the end of the evaporator. Heat Pump Service What is the major difference between a heat pump and an air conditioner? Condenser c. Evaporator d. Reversing valve The reversing valve is the component that will reverse the flow of refrigerant when changing from air conditioning to heating. What device controls the supplementary electric heat according to the outdoor temperature?
[ VIEW ANSWER ] [ Find Similar ]
No comments:
Post a Comment