Question

Questions Answer the following questions using the information in this chapter. 1. The simplest type of the following metering devices is the A. thermostatic expansion valve B. automatic expansion valve C. low-side float capillary tube 2. metering devices automatically change their orifice sizes to account for changes in load. A. Adsorption B. Equalizer C. Fixed D Modulating 3. Which of the following statements regarding capillary tubes is not true? A. A capillary tube equalizes pressure between the high side and low side during the Off cycle. B. A capillary tube positioned so that a portion of it is in contact with the suction line functions as a heat exchanger for improved system efficiency. C. Having a proper refrigerant charge is less critical in a system with a capillary tube than it is in a system with a thermostatic expansion valve D. The performance of a capillary tube is determined by its inside diameter, its length, and the number of turns. 4. The top of a thermostatic expansion valve's diaphragm is exposed to which works to close the valve. A. atmospheric pressure B. high-side pressure C. low-side pressure D sensing bulb pressure 5. The adjustor on a thermostatic expansion valve changes the A. diameter of the valve's inlet passage B. diameter of the valve's outlet passage C. magnetic strength of the coil. D. tension on the superheat spring

Answer 1

1)Capillary tube /option D

Because it's just a tube with narrow diameter

2)Modulating /option D

As modulating meters are rapidly and automatically operating meters

3)option C

As Capillary tube also must have sufficient refrigerant charge during a refrigeration cycle .

4)option C /low side pressure

5)option D
Adjustor changes the tension on the superheat Spring that helps to vary the amount of superheat flow .