WorksheetsDomRAC
Total questions: 15
Worksheet time: 15mins
A. Dr. John Gorrie developed a machine to provide ice and air conditioning for his hospital.
B. Preservation of vaccine is one of the most important uses of refrigeration.
Choose D if the first statement is TRUE and the second statement is FALSE
Choose A if the both statement is TRUE
Choose C if the first statement is FALSE and the second statement is TRUE
Choose B if the both statement is FALSE
A. After World War I discovered the halogenated hydrocarbons such as Freon #11, Freon #12, and Freon # 22 which proved to be safer and superior to ammonia as the refrigerant.
B. Studied shows that food have microbes that multiply slower in warm places.
Choose B if the both statement are true
Choose C if the second statement is false and the first statement is true
Choose D if the both statement are false
Choose A if the first statement is true and the second statement is false
A. The first man-made refrigeration is produced by the evaporation of ethyl ether into a partial vacuum and it is credited to William Cullen
B. During the 1850’s Ferdinand Carre in France developed a second type of refrigeration machine.
Choose D if the both statement are false
Choose C if the second statement is false and the first statement is true
Choose B if the both statement are true
Choose A if the first statement is true and the second statement is false
A. Ferdinand Carre introduced ammonia as the refrigerant with ammonia-water as an absorbent in 1850
B. The multiplication of microbes had been recognized as the major cause of food spoilage.
Choose A if the first statement is true and the second statement is false
Choose B if the both statement are true
Choose C if the second statement is false and the first statement is true
Choose D if the both statement are false
A. Dr. John Gorrie was granted a patent in 1844 on a closed-cycle air refrigerating machine by means of which ice was made.
B. Alexander Twinning an American, produced the first commercial ice by means of a vapor-compression machine in the year 1850.
Choose B if the both statement are true
Choose C if the second statement is false and the first statement is true
Choose A if the first statement is true and the second statement is false
Choose D if the both statement are false
It compresses low pressure gas refrigerant into high pressure gas refrigerant thus increasing the temperature is (a) .
(a) is a coil of tube located at the back of the refrigerator or at the high pressure side.
It is a coil of tube or a plate usually made of aluminum where heat is being absorbed by the refrigerant.
(a)
It reduces the high-pressure liquid refrigerant to a low pressure saturated refrigerant in a correct quantities to operate the system at maximum efficiency of cooling.
(a)
A coil of tube usually made up of steel or hard copper where heat is being discharge to the atmosphere.
(a)
The suction line and capillary tube is attached to each other in order to have a (a) .
The process of transferring heat from one are to another is called (a) .
In the mechanical refrigeration, absorption of heat is being done in the (a) .
It is a process of refrigeration which utilizes a compressor in order to circulate the refrigerant is called (a) .
It is a volatile fluid that boils in a very low temperature and serves as a blood of the refrigerating system is called (a) .
