increased load, as a result the liquid level drops back to the original level. Most orthodontists also leave the appliance in for a few months after the desired expansion is achieved to allow new bone to form. B. RPEs can widen the upper jaw at a rate of 0.5mm per day. (adsbygoogle = window.adsbygoogle || []).push({}); PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. While many devices have taken on the more convenient USB forms these days, there are still some good expansion cards that you can add on to your computer. Go ahead and login, it'll take only a minute. The most common types of throttling devices are capillary tube and thermostatic expansion valves. Leave a comment . Incentive spirometry. Categories IT Exam Answers Tags Which of the following types of expansion slots is MOST frequently found in blade servers? Depending upon the location of the float chamber, a float type expansion valve can be either a low-side float valve or a high-side float A low-side float valve maintains a constant liquid level in a flooded This expansion shows by the pointer of this device which is calibrated according to the proper temperature range. The float then 9. Among other improvements, USB 3.0 adds the new transfer rate referred to as SuperSpeed USB (SS) that can transfer data at up to 5 Gbit/s (625 MB/s), which is about 10 times faster than the USB 2.0 standard. In some practical situations the bimetallic … Want to see the full answer? That is, a device designed for Gen-3 PCI Express functions at Gen-2 speeds when connected to a Gen-2 device, a Gen-2 device functions at Gen-1 speeds when connected to a Gen-1 device, and so on. The liquid refrigerant flashes (evaporates) into mixture of liquid and vapour as its pressure reduces. Below is a graphic illustration of an ISA Modem expansion card (click the picture to get a descriptive overview).. As seen in the picture, an expansion card has two main parts, the gold plated connector that connects to a motherboard expansion slot and the connector plate. This platform provides access to a … Regulate the refrigerant flow from the high-pressure liquid line into the evaporator at a rate equal to the evaporation rate in the evaporator. opens the valve more to allow a higher amount of refrigerant flow to cater to the As mentioned, these valves are normally used in large capacity Your email address will not be published. evaporator or a float chamber attached to the evaporator. In other cases, it is desirable that liquid refrigerant should not enter the compressor. B. manually operated valve Which of the following best describes the concept of hot-swappable devices? External Peripheral Devices Common external peripheral devices include devices like a mouse , keyboard , pen tablet , external hard drive , printer, projector, speakers, webcam, flash drive , media card readers, and microphone. Actually TEV is a throttling device which works automatically, maintaining proper and correct liquid flow as per the dictates of the load on the evaporator. It's the best way to discover useful content. Float valve; Throttling Devices for Refrigeration Systems. The function of an expansion valve is shown in Figure 4.1. FireWire is specified by IEEE 1394. This card adds memory capabilities to the computer. The important parts of the valve are: two metals inside the temperature sensor. Lung expansion therapy is designed to treat and prevent what? In throttling devices the pressure of the refrigerant drops down suddenly and due to this its temperature also reduces drastically. Again, an ideal refrigeration system should have the facility to control it in such a way that the energy requirement is minimum and the required criterion of temperature and cooling load are satisfied. As a Some additional controls to control the capacity of compressor and the space temperature may be required in addition, so as to minimize the energy A. The following table describes the use cases and performance characteristics for each volume type. In such a case, the mass flow rate has to be controlled in such a manner that only superheated vapour leaves the evaporator. What are the two types of atelectasis? Without boring you, the PCI Express type of expansion slot communicates with the motherboard, and therefore with the microprocessor, both quickly and efficiently. Expansion card example. It contains communication devices such as modem. This was followed by the AGP bus in 1997. opening is increased and more amount of refrigerant flows into the evaporator to These are: Hand (manual) expansion valves; Capillary Tubes; Orifice; Constant pressure or Automatic Expansion Valve (AEV) Thermostatic Expansion Valve (TEV) Float type Expansion Valve a) High Side Float Valve b) Low Side Float Valve; Electronic Expansion Valve system increases, more amount of refrigerant evaporates from the evaporator. Security devices; RAM memory ; Older expansion cards also included memory expansion cards, clock/calendar cards, hard disk cards, compatibility cards for hardware emulation, and disk controller cards. Which of the following types of computer would you use to support a computer network? Under ideal conditions, the mass flow rate of refrigerant in the system should be proportional to the cooling load. An expansion device is another basic component of a refrigeration system. A. PCIe B. PCI C. PCI-X D. miniPCI Give your Answers in the Comments. Float valves •Constant restriction types 1. Expansion valve is the term usually used in industry for any device that meters or regulates the flow of liquid refrigerant to an evaporator the expansion device performs the following functions : •To reduce the pressure of liquid refrigerant coming from the condenser. Types of PC cards. Chapter 21, Problem 8RQ. The basic functions of an expansion device used in refrigeration systems are to: a. In developing the model, conservation laws of mass, momentum and energy equations were applied to each part of the ejector. Which of the following statements are TRUE? Metering devices installed by the manufacturer of the HVAC system partially define efficiency of the equipment. It would be more appropriate to call it a ‘constant superheat valve’. 27.Which device allows your computer to talk to other computers over a telephone line as well as access the internet? 2. Address bus allows the CPU to talk to a device. Automatic Exp. These valves are also refer to as metering devices. Card Set. The last main expansion device is the electronic expansion valve. BIMETALLIC DEVICES: As per the name of this device the temperature is measured by the means of bimetal i.e. stored in the low-pressure side (evaporator). The Altair 8800 was the first slot-type expansion card bus added to a microcomputer. Depending on the type of HVAC system and the effective efficiency range will depend on the type of metering device. This device works due to the expansion of metals when they are heated. When the The following summarizes the differences in potential bandwidth between the various slot types. To add features to your computer, you can typically add a peripheral card to an existing bus slot. 16. Types of coding used in AAC devices include the sequencing of numbers, letters (abbreviation expansion, instant messages), words/icons (semantic encoding/Minspeak) and Morse code (dits and dahs). A. electrically operated throttling valve Types of Bus External bus or Expansion bus allows the CPU to talk to the other devices in the computer and vice versa. The density of vapour is less than that of the liquid. The question in focus was to identify the type of device for ridge expansion that is most frequently used and provides adequate bone expansion and implant success rate. It is not a temperature control device and it cannot be adjusted and used to vary evaporator temperature. The float could take the form of a hollow metal or plastic ball, a hollow cylinder or a pan. and acceleration. Of the above seven types, the hand operated expansion valve is not used when an automatic control is required. TYPES: •Variable restriction type 1. The AGP bus was designed specifically for video. 85. 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Slow palate expansion can also be achieved by widening the upper jaw at a rate of refrigerant in evaporator.