4th TSSA Part B Test (I) Exam Questions with Correct Answers and
Answers with Verified Solutions | Latest 2026 Update
Q: systems?
Answer:
Less physical space requirements A fast-closing valve that automatically and
completely shuts off the fuel supply,in response to an operating limit or a safety
limit, is a safety shut-off valve R4B08-01-03-01 Occupancy sensors: Are automatic
switches (4-125-4.10) Specific humidity is the: Actual moisture content of air
expressed as kg of moisture per kg of dry air R4B07-05-02-01 One complete
movement of the piston in one direction requires ____________ of the engine
crankshaft: One-half revolution R4B08-02-01-02 When the maximum building
demand for potable water is always less than the maximum flow available from a
municipal or local distribution system, which of the following systems can be used?
A tank-less constant pressure system R4B05-02-04-03 A strand of fibre rope Is
composed of yarns with a left-handed twist R4B01-02-02-08 A large journal bearing
which is running hotter than normal can be cooled by: Loosening the bearing caps
,Q: (4-075-1.6) Single stage reciprocating air compressors have: One or more
cylinders of equal size The main burner test firing valve should be opened
before starting the main burner (4-120-1.4) Which of the following statements
about refrigeration pressure gauges is TRUE?
Answer:
Refrigeration pressure gauges can indicate saturation temperatures in a system. A
boiler has an M-alkalinity that is greater than the prescribed control range. What is
the appropriate operator response? Increase the rate of continuous blowdown.
(4-142-2.13) On hot oil heaters, the low oil flow shutdown sensors (FISL) are always
installed on the: Hot oil outlet line from the oil heater (4-073-3.7) A volute type
pump: Has aspiral casing with an increasing cross sectional area. Who should verify
a steam boiler lockout? A second qualified operator. R4B08-01-04-01 The NFPA
Life Safety Code requires that emergency lighting be provided for means of exit in:
All educational occupancies (4-098-2.1) Compared to a steam heating system, if a
hot water heating system develops a leak, damage will Be greater in the hot water
system (4-096-2.8) Air can be removed from steam heating systems by installing: Air
vents
, Q: (4-131-1.4) If air at 13°C can hold a maximum of 0.0032 kg of moisture per
kilogram of air, what is the relative humidity if the air contains 0.0015 kg of
moisture per 1 kg of air?
Answer:
0.47 In the case of a single boiler steam heating system, ASME VI advises operators
to warm up heating boilers and their steam piping simultaneously. (4-073-3.13) A
double-acting pump: Is a positive displacement pump R4B01-01-03-22 Air
compressor oil should: Have low carbon residue R4B01-01-03-16 The property of oil
that indicates its ability to support a load is: Viscosity (4-073-3.2) Rotary pumps
should be started with the discharge valve open because they are _____ pumps.
Positive displacement R4B08-03-01-01 Traps are installed in sanitary drainage
systems to Prevent sewer gases from entering the building (4-130-1.4) It is good
design practice to select a steam coil size so that: At least 40% of the coil capacity is
needed when the air temperature entering the coil is 1°C (4-113-1.1) Which of the
following is an example of a loss of latent heat? Steam condenses (4-115-1.2) Which
of the following is not a component of the low pressure side of a compression
refrigeration system? Compressor discharge piping R4B08-03-01-08 A deep seal
plumbing trap has a water seal depth of: 10 cm
Answers with Verified Solutions | Latest 2026 Update
Q: systems?
Answer:
Less physical space requirements A fast-closing valve that automatically and
completely shuts off the fuel supply,in response to an operating limit or a safety
limit, is a safety shut-off valve R4B08-01-03-01 Occupancy sensors: Are automatic
switches (4-125-4.10) Specific humidity is the: Actual moisture content of air
expressed as kg of moisture per kg of dry air R4B07-05-02-01 One complete
movement of the piston in one direction requires ____________ of the engine
crankshaft: One-half revolution R4B08-02-01-02 When the maximum building
demand for potable water is always less than the maximum flow available from a
municipal or local distribution system, which of the following systems can be used?
A tank-less constant pressure system R4B05-02-04-03 A strand of fibre rope Is
composed of yarns with a left-handed twist R4B01-02-02-08 A large journal bearing
which is running hotter than normal can be cooled by: Loosening the bearing caps
,Q: (4-075-1.6) Single stage reciprocating air compressors have: One or more
cylinders of equal size The main burner test firing valve should be opened
before starting the main burner (4-120-1.4) Which of the following statements
about refrigeration pressure gauges is TRUE?
Answer:
Refrigeration pressure gauges can indicate saturation temperatures in a system. A
boiler has an M-alkalinity that is greater than the prescribed control range. What is
the appropriate operator response? Increase the rate of continuous blowdown.
(4-142-2.13) On hot oil heaters, the low oil flow shutdown sensors (FISL) are always
installed on the: Hot oil outlet line from the oil heater (4-073-3.7) A volute type
pump: Has aspiral casing with an increasing cross sectional area. Who should verify
a steam boiler lockout? A second qualified operator. R4B08-01-04-01 The NFPA
Life Safety Code requires that emergency lighting be provided for means of exit in:
All educational occupancies (4-098-2.1) Compared to a steam heating system, if a
hot water heating system develops a leak, damage will Be greater in the hot water
system (4-096-2.8) Air can be removed from steam heating systems by installing: Air
vents
, Q: (4-131-1.4) If air at 13°C can hold a maximum of 0.0032 kg of moisture per
kilogram of air, what is the relative humidity if the air contains 0.0015 kg of
moisture per 1 kg of air?
Answer:
0.47 In the case of a single boiler steam heating system, ASME VI advises operators
to warm up heating boilers and their steam piping simultaneously. (4-073-3.13) A
double-acting pump: Is a positive displacement pump R4B01-01-03-22 Air
compressor oil should: Have low carbon residue R4B01-01-03-16 The property of oil
that indicates its ability to support a load is: Viscosity (4-073-3.2) Rotary pumps
should be started with the discharge valve open because they are _____ pumps.
Positive displacement R4B08-03-01-01 Traps are installed in sanitary drainage
systems to Prevent sewer gases from entering the building (4-130-1.4) It is good
design practice to select a steam coil size so that: At least 40% of the coil capacity is
needed when the air temperature entering the coil is 1°C (4-113-1.1) Which of the
following is an example of a loss of latent heat? Steam condenses (4-115-1.2) Which
of the following is not a component of the low pressure side of a compression
refrigeration system? Compressor discharge piping R4B08-03-01-08 A deep seal
plumbing trap has a water seal depth of: 10 cm
