One of the expansion device's functions could be as follows:

$O$ Guided the refrigeration fluid flow in the evaporator.

O Allow the refrigeration fluid flow in the evaporator.

O Prevent the refrigeration fluid flow in the evaporator.

Control the refrigeration fluid flow in the evaporator.

$2.$ Heat is absorbed by the refrigerant in a refrigeration cycle using:

O Condenser. O Expansion valve. O Evaporator. O Compressor.

$3.$ The $.........$ is the difference between the temperature of the water leaving the cooling tower and the wet bulb temperature of the air entering.

$0$ temperature difference. O Range. O Approach. O superheat value.

$4.$ If the rates of water and air flow continue to be consistent, the value of $\frac{h_{c}A}{C_{pm}}$ of cooling tower will be:

O Constant. O Raised. O Deteriorated. O none of these. the

$5.$ Subcooling the liquid refrigerant in a vapor compression refrigeration system system's coefficient of performance.

O Reduced. O Remain constant. O Enhanced. O none of these.

$6.$ Which of the following functions is performed by the expansion device.

$O$ It increases vapor refrigerant pressure to condenser pressure.

$O$ It keeps liquid refrig$$rant pressure at evaporator pressure.

O It keeps liquid refrigerant pressure at condenser pressure.

O It reduces liquid refrigerant pressure to evaporator pressure.

$7.$ Compute the velocity of liquid R$-22$ flows with rate of $0\mathrm{.}008k\frac{g}{s}$ in a capillary tube $($ID$=1\mathrm{.}4mm)$ if the density is $1128k\frac{g}{m^3}.$

$04\mathrm{.}2\frac{m}{s}.4\mathrm{.}4\frac{m}{s}.,04\mathrm{.}6\frac{m}{s}.,4\mathrm{.}8\frac{m}{s}.$

$8.$ In a vapor compression refrigeration system, the cycle's maximum temperature happens after

O evaporation. O condensation. O compression. O throttle.

$9.$ The cooling tower is a heat exchanger in which:

a combined heat and mass transfer processes take place.

O only mass transfer process takes place.

O only heat transfer process takes place.

O none of the above.

$10.$ The condition that arises in the evaporator when the suction pressure increases, and the capillary tube fails to supply enough refrigerant to sufficiently cool the evaporator surface is$.........$

$O$ balanced. $O$ flooded. $O$ throttle. O starving.