ABSA 4b Exam Newest Exam 2025 | All Questions
and Correct Answers | Graded A+ | Verified
Answers | Just Released
Air-cooled condensers of large capacity are found mainly in
which of the following locations?
a) roof tops
b) closed rooms with low air circulation
c) warm dry rooms
d) cold rooms with low air circulation
e) any of the above ---------CORRECT ANSWER-----------------A
Which of the following statements about double tube
condensers is true?
a) It consists of two separate tubes side by side.
b) It cannot be used with air cooled condensers.
c) Water flow in the inner tube is in the opposite direction
of the flow of refrigerant.
d) It has the highest efficiency of the water-cooled
condensers.
e) It is a small condenser for a large capacity system. ---------CORRECT ANSWER-----
------------C
,The condenser which is very expensive to clean and requires
the tubes to be cleaned with acid and neutralized is the
a) shell and tube condenser
b) shell and coil condenser
c) double tube condenser
d) evaporative condensers
e) baffle condensers ---------CORRECT ANSWER-----------------B
The amount of water used in an evaporative condenser is only
a small percentage of that used in a water condenser of the
same capacity. This is due primarily to what?
a) Evaporating condensers also use air to cool the
refrigerant.
b) The evaporating condensers spray refrigerated water onto
condensing coil.
c) Water evaporating requires a large amount of latent heat.
d) Water being recirculated.
e) None of the above. ---------CORRECT ANSWER-----------------C
The common types of water-cooled condensers used in
refrigeration systems are:
,1. the shell and tube
2. the shell and coil
3. the double tube
4. the plate surface
a) 1, 2, 3
b) 1, 3, 4
c) 2, 3, 4
d) 1, 2, 4
e) 3, 4 ---------CORRECT ANSWER-----------------A
Defective condenser operation is a result of the presence of
all of the following except
a) scale forming chemicals
b) dirty cooling water
c) noncondensible gases
d) low coolant circulation
e) compressor lubricating oil ---------CORRECT ANSWER-----------------E
The purpose of a condenser in a refrigeration system is
a) to remove the sensible heat from the refrigerant
b) to remove the latent heat from the refrigerant
c) to cool the liquid refrigerant
, d) to vaporize the liquid refrigerant
e) to reduce the pressure in the evaporator
Refrigeration Metering Devices & Capacity Controls ---------CORRECT ANSWER------
-----------B
The most widely used refrigerant control which consists of a
bellows or a diaphragm chamber connected to a temperature
sensing bulb by means of a small capillary tube is a/an
a) thermostatic expansion valve
b) automatic expansion valve
c) low pressure float valve
d) hand operated expansion valve
e) high pressure float valve ---------CORRECT ANSWER-----------------A
Which of the statements about automatic expansion valves is
false?
a) The valve maintains constant pressure in the evaporator
during compressor operation regardless of the load.
b) When the compressor stops the valve automatically shuts
off.
c) A spring exerting a downward force on the diaphragm tends
to open the valve.
d) The spring force is countered by evaporator pressure
and Correct Answers | Graded A+ | Verified
Answers | Just Released
Air-cooled condensers of large capacity are found mainly in
which of the following locations?
a) roof tops
b) closed rooms with low air circulation
c) warm dry rooms
d) cold rooms with low air circulation
e) any of the above ---------CORRECT ANSWER-----------------A
Which of the following statements about double tube
condensers is true?
a) It consists of two separate tubes side by side.
b) It cannot be used with air cooled condensers.
c) Water flow in the inner tube is in the opposite direction
of the flow of refrigerant.
d) It has the highest efficiency of the water-cooled
condensers.
e) It is a small condenser for a large capacity system. ---------CORRECT ANSWER-----
------------C
,The condenser which is very expensive to clean and requires
the tubes to be cleaned with acid and neutralized is the
a) shell and tube condenser
b) shell and coil condenser
c) double tube condenser
d) evaporative condensers
e) baffle condensers ---------CORRECT ANSWER-----------------B
The amount of water used in an evaporative condenser is only
a small percentage of that used in a water condenser of the
same capacity. This is due primarily to what?
a) Evaporating condensers also use air to cool the
refrigerant.
b) The evaporating condensers spray refrigerated water onto
condensing coil.
c) Water evaporating requires a large amount of latent heat.
d) Water being recirculated.
e) None of the above. ---------CORRECT ANSWER-----------------C
The common types of water-cooled condensers used in
refrigeration systems are:
,1. the shell and tube
2. the shell and coil
3. the double tube
4. the plate surface
a) 1, 2, 3
b) 1, 3, 4
c) 2, 3, 4
d) 1, 2, 4
e) 3, 4 ---------CORRECT ANSWER-----------------A
Defective condenser operation is a result of the presence of
all of the following except
a) scale forming chemicals
b) dirty cooling water
c) noncondensible gases
d) low coolant circulation
e) compressor lubricating oil ---------CORRECT ANSWER-----------------E
The purpose of a condenser in a refrigeration system is
a) to remove the sensible heat from the refrigerant
b) to remove the latent heat from the refrigerant
c) to cool the liquid refrigerant
, d) to vaporize the liquid refrigerant
e) to reduce the pressure in the evaporator
Refrigeration Metering Devices & Capacity Controls ---------CORRECT ANSWER------
-----------B
The most widely used refrigerant control which consists of a
bellows or a diaphragm chamber connected to a temperature
sensing bulb by means of a small capillary tube is a/an
a) thermostatic expansion valve
b) automatic expansion valve
c) low pressure float valve
d) hand operated expansion valve
e) high pressure float valve ---------CORRECT ANSWER-----------------A
Which of the statements about automatic expansion valves is
false?
a) The valve maintains constant pressure in the evaporator
during compressor operation regardless of the load.
b) When the compressor stops the valve automatically shuts
off.
c) A spring exerting a downward force on the diaphragm tends
to open the valve.
d) The spring force is countered by evaporator pressure
