Metering Device Pretest Quiz

Question 1

The low side float is always used with;

a) dry system
b) flooded
c) both
d) neither a or b

Answer 1

b) flooded

Question 2

The disadvantage of a low side float are;

a) large in size
b) needle valve tends to stick
b) oil binding
d) all of the above

Answer 2

d) all of the above

Question 3

The high side of a float allows liquid refrigerant to enter the evaporator:

a) on a lowering liquid level in the float chamber
b) on a rise of liquid level in the float chamber
c) liquid level is not a factor
d) when the oil level drops

Answer 3

b) on a rise of liquid level in the float chamber

Question 4

The high side float is used in a critically charged system;

True or False

Answer 4

True

Question 5

Capillary tubes are generally used with:

a) domestic refrigeration
b) a temperature control
c) hermetic compressors
d) all of the above

Answer 5

d) all of the above

Question 6

The capillary tube allows the high and low sides of the system to equalize on the off cycle:

True or False

Answer 6

True

Question 7

The AXV is used with:

a) temperature control
b) pressure control
c) flooded evaporator
d) water cooled condenser only

Answer 7

a) temperature control

Question 8

The AXV has difficulty in handling load variations:

True or False

Answer 8

True

Question 9

The main pressures affecting the AXV are:

a) spring pressure, evaporator pressure
b) evaporator pressure, ambient pressure
c) condenser pressure, spring pressure
d) spring pressure, fall pressure

Answer 9

a)

Question 10

The TXV is operated by three pressures. What are they?

a) evaporator, spring, suction pressure
b) evaporator, bulb, condenser pressure
c) evaporator, spring, political pressure
d) evaporator, spring, bulb pressure

Answer 10

d) evaporator, spring, bulb pressure

Question 11

The thermostatic expansion valve controls;

a) evaporator temperature
b) evaporator pressure
c) latent heat
d) superheat

Answer 11

d) superheat

Question 12

The sensing bulb of the TXV is located;

a) at the inlet of the evaporator
b) at the outlet of the evaporator
c) at the inlet of the condenser
d) at the outlet of the condenser

Answer 12

b) at the outlet of the evaporator

Question 13

On a multiple evaporator system what type of metering device is normally used?

a) hand expansion valve
b) automatic expansion valve
c) thermostatic expansion valve
d) any of the above

Answer 13

c) thermostatic expansion valve

Question 14

Where are metering devices located?

a) at the outlet of evaporator
b) at the inlet of the compressor
c) at the middle of the system
d) at the inlet of the evaporator

Answer 14

d) at the inlet of the evaporator

Question 15

The ________ float is not normally used with a receiver.

a) high side
b) low side
c) make up
d) ice cream

Why is it not normally used with a receiver?

Answer 15

a) high side

Because it is critically charged

Question 16

To increase the capacity of a capillary tube you can _________

a) straighten it out
b) coil it up
c) put more in the evaporator
d) decrease the length

Answer 16

d) decrease the length

Question 17

Which metering device is generally used to handle varying load charges?

a) AXV
b) Hand Valve
c) TXV
d) Any metering device

Answer 17

TXV

Question 18

The low side float is controlled by

a) the rate of condensation
b) rate of evaporation
c) the evaporator temperature
d) the evaporator pressure

Answer 18

b) the rate of evaporation

Question 19

The AXV controls;

a) condenser temperature
b) evaporator superheat
c) the rate of refrigerant condensation
d) the evaporator pressure

Answer 19

d) evaporator pressure

Question 20

The metering device is designed to;

a) keep the evaporator as cold as possible
b) to control evaporator superheat
c) control the flow of refrigerant
d) to keep a constant evaporator pressure

Answer 20

c) control the flow of refrigerant