4th TSSA Part B Test (II) | Exam Questions with Correct Answers and
Answers with Verified Solutions | Latest 2026 Update
Q: (4-119-1.2) Which of these statements about automatic expansion valves is
FALSE?
Answer:
The automatic expansion valve is usually used with multiple cooling coils connected
to the same compressor (4-075-1.8) A reciprocating air compressor works on the
principle of: Volume reduction (4-132-4.3) The most common residential system,
where a furnace provides conditioned airto each room via ducts, is called a: Forced
air system (4-096-2.9) Manually operated petcocks for expelling air from heating
systems have been superseded by: Automatic air vents (4-067-1.16) The pH of the
water inside a boiler: Is often controlled with sodium hydroxide 4B07-03-05-03 To
prevent cooling tower basin water from freezing during cold weather, many units:
have thermostatically controlled electric basin heaters. If a power failure occurs,
which of the following valves fail open? Fuel line bleed valve.
,Q: (4-127-1.2) Total pressure exerted by the air is the sum of: Static pressure and
velocity
Answer:
pressure
R4B07-05-01-03 Internal combustion engines that drive gas compression machinery,
and burn
natural gas, operate on the ________ cycle. two or four stroke
R4B05-02-01-02 A rung ladder should: be inclined with a 4:1 slope
(4-074-4.1) Shaft misalignment during operation of a pump can be caused by bearing
wear,
thermal expansion and: Shaft flexing
(4-093-int.1) The prime importance of boiler fittings is: Safety & efficiency
R4B07-02-04-01 When starting a steam turbine it is customary practice to: check the
lube oil
and start the lube oil cooler before starting the turbine
(4-087-5.8) The main controlling device used with an On/Off combustion fuel
control is a _____
sensing element. Pressure
R4B08-01-01-02 A luminaire is a complete lighting unit
R4B07-02-02-01 Shaft sealing of small steam turbines is done with: Carbon rings
(4-113-4.1) The rate at which a refrigeration system removes heat from the
refrigerated
medium is defined as: the refrigeration capacity.
, Q: (4-087-1.3) A mercury switch bulb is under high vacuum and contains inert gas:
To keep the
Answer:
mercury from oxidizing
(4-128-1.2) Air conditioning ducts are classified as: Low pressure, medium pressure,
and
high pressure
(4-127-2.1) The propeller axial flow fan: Finds application in unit heaters, air-cooled
condensers, and as an exhaust fan for ventilation purposes
R4B04-02-01-04 Slight smoking when first starting a cold oil-fired boiler occurs
because the
furnace is cold.
R4B01-01-02-08 A material that is commonly used as a solid lubricant is:
Molybdenum
disulfide
(4-136-1.4) Thermal transmission is the: The total heat flow due to all heat transfer
modes,
per unit time (in Watts)
Standby equipment: should be run on a regular basis.
(4-123-2.5) Which of the following statements about lithium bromide absorption
refrigeration
systems is FALSE? As water vapour is absorbed by lithium bromide, the pressure in
the
evaporator increases
(4-142-2.27) The mechanical seal material in a hot oil pump determines the:
Maximum
temperature of the oil that can be pumped
R4B04-01-02-05 The purpose of a boiler boil out is to: remove grease and oil from
the heat
transfer surfaces.
Answers with Verified Solutions | Latest 2026 Update
Q: (4-119-1.2) Which of these statements about automatic expansion valves is
FALSE?
Answer:
The automatic expansion valve is usually used with multiple cooling coils connected
to the same compressor (4-075-1.8) A reciprocating air compressor works on the
principle of: Volume reduction (4-132-4.3) The most common residential system,
where a furnace provides conditioned airto each room via ducts, is called a: Forced
air system (4-096-2.9) Manually operated petcocks for expelling air from heating
systems have been superseded by: Automatic air vents (4-067-1.16) The pH of the
water inside a boiler: Is often controlled with sodium hydroxide 4B07-03-05-03 To
prevent cooling tower basin water from freezing during cold weather, many units:
have thermostatically controlled electric basin heaters. If a power failure occurs,
which of the following valves fail open? Fuel line bleed valve.
,Q: (4-127-1.2) Total pressure exerted by the air is the sum of: Static pressure and
velocity
Answer:
pressure
R4B07-05-01-03 Internal combustion engines that drive gas compression machinery,
and burn
natural gas, operate on the ________ cycle. two or four stroke
R4B05-02-01-02 A rung ladder should: be inclined with a 4:1 slope
(4-074-4.1) Shaft misalignment during operation of a pump can be caused by bearing
wear,
thermal expansion and: Shaft flexing
(4-093-int.1) The prime importance of boiler fittings is: Safety & efficiency
R4B07-02-04-01 When starting a steam turbine it is customary practice to: check the
lube oil
and start the lube oil cooler before starting the turbine
(4-087-5.8) The main controlling device used with an On/Off combustion fuel
control is a _____
sensing element. Pressure
R4B08-01-01-02 A luminaire is a complete lighting unit
R4B07-02-02-01 Shaft sealing of small steam turbines is done with: Carbon rings
(4-113-4.1) The rate at which a refrigeration system removes heat from the
refrigerated
medium is defined as: the refrigeration capacity.
, Q: (4-087-1.3) A mercury switch bulb is under high vacuum and contains inert gas:
To keep the
Answer:
mercury from oxidizing
(4-128-1.2) Air conditioning ducts are classified as: Low pressure, medium pressure,
and
high pressure
(4-127-2.1) The propeller axial flow fan: Finds application in unit heaters, air-cooled
condensers, and as an exhaust fan for ventilation purposes
R4B04-02-01-04 Slight smoking when first starting a cold oil-fired boiler occurs
because the
furnace is cold.
R4B01-01-02-08 A material that is commonly used as a solid lubricant is:
Molybdenum
disulfide
(4-136-1.4) Thermal transmission is the: The total heat flow due to all heat transfer
modes,
per unit time (in Watts)
Standby equipment: should be run on a regular basis.
(4-123-2.5) Which of the following statements about lithium bromide absorption
refrigeration
systems is FALSE? As water vapour is absorbed by lithium bromide, the pressure in
the
evaporator increases
(4-142-2.27) The mechanical seal material in a hot oil pump determines the:
Maximum
temperature of the oil that can be pumped
R4B04-01-02-05 The purpose of a boiler boil out is to: remove grease and oil from
the heat
transfer surfaces.
