3rd TSSA Part A2 - Test (III) UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What is the peak-to-peak value of an alternating current if the rms value is 12 A? - CORRECT
ANSWER - 33.94 A
Electrostatic precipitators have an efficiency of greater than: - CORRECT ANSWER -
95%
The purpose of the bolted-on jacket on some plug valves is to: - CORRECT ANSWER -
Add heating to a non-jacketed existing valve.
List the ways that butterfly valves can be installed into a piping system:
1. Welded.
2. Unions.
3. Flanged.
4. Wafer. - CORRECT ANSWER - 3, 4
Wet pipe sprinkler systems are found in:
1. Office buildings.
2. Stores.
3. Manufacturing facilities.
4. Hotels.
5. Health care facilities. - CORRECT ANSWER - 1, 2, 3, 4, 5
Which of these is the "Boiler, Pressure Vessel and Pressure Piping Code" ? - CORRECT
ANSWER - CSA B51
,The maximum temperature of fluids handled by a diaphragm valve must be below the
temperature limit for the: - CORRECT ANSWER - Diaphragm material
The most frequently used materials for power piping systems are:
1. Inconel 800 H.
2. Alloy steels.
3. Low carbon steels.
4. Galvanized steel.
5. Austenitic stainless steels - CORRECT ANSWER - 2, 3, 5
In a magnetic circuit, the magnetic flux is the equivalent of electric _____ in an electric circuit. -
CORRECT ANSWER - Current
An insulating material may be defined as one which: - CORRECT ANSWER - Transmits
heat poorly
Clear definitions for terms and equipment relating to refrigeration and air conditioning
equipment are defined in the _____. - CORRECT ANSWER - CSA-B52
Armature reaction _____ the main field of a generator. - CORRECT ANSWER - Distorts
Viscosity of fuel oil _____ as the temperature increases and becomes nearly constant, above
120°C. - CORRECT ANSWER - Decreases
The armature core in a DC machine is made of: - CORRECT ANSWER - Soft iron
laminations.
The purpose of the AC kilovar meter is to: - CORRECT ANSWER - Measure the reactive
power being generated by the AC generation system.
, Calculate the maximum allowable working pressure, in kPa, for a watertube boiler tube, which is
73.5 mm O.D. and has a minimum wall thickness of 4.71 mm. The tube is strength-welded into
place in the boiler and is located in the furnace area of the boiler. Tube material is carbon steel,
SA-192, with a mean wall temperature of 280°C. - CORRECT ANSWER - 11.54 MPa.
Centrifugal type steam separators have _____ sets of baffles: - CORRECT ANSWER -2
Arrange into correct sequence, the following steps in the typical start up of a steam system.
1. Check that each trap is working properly, to prevent an unexpected build-up of condensate in
the steam line.
2. All low point drain valves must be opened wide. These are usually located upstream of all the
trap stations and the supply to steam turbines inlet valves.
3. Continue opening the main header valve, as the steam pressure rises.
4. Crack open the bypass around the main header steam admission valve, if so equipped. You
should hear steam entering the header.
5. Check each low point drain for the presence of condensate.
6. If a bypass is not installed, crack open the main header steam admission valve.
7. If there is not any condensate coming from the drains, increase the opening of the main header
steam admission bypass valve.
8. Listen for the sounds of any water hammer taking place. If there is any, reduce - CORRECT
ANSWER - 2, 4, 6, 5, 7, 8, 9, 10, 11, 3, 1
The purpose of the frequency meter is to: - CORRECT ANSWER - Indicate the frequency
of the power being produced.
Calculate the minimum required thickness, in mm, for a blank, un-stayed, full-hemispherical
head, with the pressure on the concave side. The head is fabricated from seamless material and is
double butt welded to the shell. All reinforcement is removed and fully radiographed. The radius
to which the head is dished is 700 mm, maximum allowable working pressure is 4000 kPa, and
the head material SA-285 C will not reach a temperature greater than 340°C. Use S = 94.7 MPa
(from 2004 Codes) - CORRECT ANSWER - 14.85 mm.
ACTUAL Exam Questions and CORRECT
Answers
What is the peak-to-peak value of an alternating current if the rms value is 12 A? - CORRECT
ANSWER - 33.94 A
Electrostatic precipitators have an efficiency of greater than: - CORRECT ANSWER -
95%
The purpose of the bolted-on jacket on some plug valves is to: - CORRECT ANSWER -
Add heating to a non-jacketed existing valve.
List the ways that butterfly valves can be installed into a piping system:
1. Welded.
2. Unions.
3. Flanged.
4. Wafer. - CORRECT ANSWER - 3, 4
Wet pipe sprinkler systems are found in:
1. Office buildings.
2. Stores.
3. Manufacturing facilities.
4. Hotels.
5. Health care facilities. - CORRECT ANSWER - 1, 2, 3, 4, 5
Which of these is the "Boiler, Pressure Vessel and Pressure Piping Code" ? - CORRECT
ANSWER - CSA B51
,The maximum temperature of fluids handled by a diaphragm valve must be below the
temperature limit for the: - CORRECT ANSWER - Diaphragm material
The most frequently used materials for power piping systems are:
1. Inconel 800 H.
2. Alloy steels.
3. Low carbon steels.
4. Galvanized steel.
5. Austenitic stainless steels - CORRECT ANSWER - 2, 3, 5
In a magnetic circuit, the magnetic flux is the equivalent of electric _____ in an electric circuit. -
CORRECT ANSWER - Current
An insulating material may be defined as one which: - CORRECT ANSWER - Transmits
heat poorly
Clear definitions for terms and equipment relating to refrigeration and air conditioning
equipment are defined in the _____. - CORRECT ANSWER - CSA-B52
Armature reaction _____ the main field of a generator. - CORRECT ANSWER - Distorts
Viscosity of fuel oil _____ as the temperature increases and becomes nearly constant, above
120°C. - CORRECT ANSWER - Decreases
The armature core in a DC machine is made of: - CORRECT ANSWER - Soft iron
laminations.
The purpose of the AC kilovar meter is to: - CORRECT ANSWER - Measure the reactive
power being generated by the AC generation system.
, Calculate the maximum allowable working pressure, in kPa, for a watertube boiler tube, which is
73.5 mm O.D. and has a minimum wall thickness of 4.71 mm. The tube is strength-welded into
place in the boiler and is located in the furnace area of the boiler. Tube material is carbon steel,
SA-192, with a mean wall temperature of 280°C. - CORRECT ANSWER - 11.54 MPa.
Centrifugal type steam separators have _____ sets of baffles: - CORRECT ANSWER -2
Arrange into correct sequence, the following steps in the typical start up of a steam system.
1. Check that each trap is working properly, to prevent an unexpected build-up of condensate in
the steam line.
2. All low point drain valves must be opened wide. These are usually located upstream of all the
trap stations and the supply to steam turbines inlet valves.
3. Continue opening the main header valve, as the steam pressure rises.
4. Crack open the bypass around the main header steam admission valve, if so equipped. You
should hear steam entering the header.
5. Check each low point drain for the presence of condensate.
6. If a bypass is not installed, crack open the main header steam admission valve.
7. If there is not any condensate coming from the drains, increase the opening of the main header
steam admission bypass valve.
8. Listen for the sounds of any water hammer taking place. If there is any, reduce - CORRECT
ANSWER - 2, 4, 6, 5, 7, 8, 9, 10, 11, 3, 1
The purpose of the frequency meter is to: - CORRECT ANSWER - Indicate the frequency
of the power being produced.
Calculate the minimum required thickness, in mm, for a blank, un-stayed, full-hemispherical
head, with the pressure on the concave side. The head is fabricated from seamless material and is
double butt welded to the shell. All reinforcement is removed and fully radiographed. The radius
to which the head is dished is 700 mm, maximum allowable working pressure is 4000 kPa, and
the head material SA-285 C will not reach a temperature greater than 340°C. Use S = 94.7 MPa
(from 2004 Codes) - CORRECT ANSWER - 14.85 mm.
