TSSA G2 Practice Questions (Units 10-16) Questions with Correct
Answers and Answers with Verified Solutions | Latest 2026 Update
Q: (12) What is electrolysis?
Answer:
The chemical breakdown of two metals in contact reacting with one another (12)
What is Ampacity? The current carrying capacity of electric conductors expressed in
amperes (12) The CE code defines low voltage circuits as those operating in what
voltage range? 31 V to 750 V inclusive (12) In what electrical state are wiring
diagrams typically drawn? In an "at rest" state (de- energized state) (12) What is the
voltage, phase, and frequency of residential electrical service? 240 volts (V),
single-phase, 60 hertz (240/1/60) (12) The neutral line on a distribution panel must
be grounded twice. True or False False, the neutral is permitted to be grounded only
once. (12) Control relays are suitable for controlling single phase motors. True or
False? False, control relays are not suited for controlling even single phase motors of
any size because of high starting currents and high back currents (12) Two boxes
commonly used in the installation of gas appliances and equipment are: Device boxes
and junction boxes
,Q: (12) A single thermocouple may be used to supervise inputs of natural gas
appliances with inputs of up to 1 000 000 Btu/h (300 kW) if they have:
Unrestricted vertical flue passes (12) Powerpile generators are used on
appliances with which type of controls?
Answer:
Automatic- type controls (12) A thermocouple only generates a voltage when the
temperature difference between the hot and cold junction is at least: 400 F or 204 C
(12) What are the two types of Powerpiles? Coaxial and Two wire (12) Below what
millivoltage (open circuit) should a thermocouple be replaced? 20 mV (Should read
around 30) (12) Below what millivoltage (closed circuit) should a thermocouple be
replaced? 8 mV (Should read around 15) (12) The coil of the pilotstat should create
enough magnetic field to hold the valve open until the millivoltage drops between: 5
and 2 mV (12) What is the usual voltage rating for a dedicated millivolt thermostat?
0 to 1.5 V DC (12) What dose the motor thermostat directly sense? The motor
winding temperature (12) If a given motor has more poles will it turn faster or
slower? The more poles a motor has, the slower the motor will turn.
, Q: (12) What formula would be used to determine the theoretical synchronous
speed (without load) of motors in RPM?
Answer:
RPM = (Frequency x 120)/number of poles (12) What is the difference between the
motor-calculated speed and the actual speed referred to as? Motor slip (12) What is
the more widely used type of motor three-phase or single-phase? Three-phase
because of their efficiency and constant speed characteristics (12) What are the three
main types of three-phase AC motors? Squirrel cage induction, wound rotor,
synchronous (12) Which type of AC motor has the simplest construction? Squirrel
cage induction motor (12) Which type of connection subjects the windings to higher
voltage, delta or wye? Delta (12) Which phased motor requires a supplementary
device to make it self-starting? A single- phase motor (12) If you must use a new
capacitor that has a slightly different capacity than the old capacitor what are the
parameters? 5%-10% over rather than under (12) At what speed do start relays
remove the starting winding from the circuit? 75% of its normal running speed (12)
What type of device is a 'Klixon disc'? A current sensing device
Answers and Answers with Verified Solutions | Latest 2026 Update
Q: (12) What is electrolysis?
Answer:
The chemical breakdown of two metals in contact reacting with one another (12)
What is Ampacity? The current carrying capacity of electric conductors expressed in
amperes (12) The CE code defines low voltage circuits as those operating in what
voltage range? 31 V to 750 V inclusive (12) In what electrical state are wiring
diagrams typically drawn? In an "at rest" state (de- energized state) (12) What is the
voltage, phase, and frequency of residential electrical service? 240 volts (V),
single-phase, 60 hertz (240/1/60) (12) The neutral line on a distribution panel must
be grounded twice. True or False False, the neutral is permitted to be grounded only
once. (12) Control relays are suitable for controlling single phase motors. True or
False? False, control relays are not suited for controlling even single phase motors of
any size because of high starting currents and high back currents (12) Two boxes
commonly used in the installation of gas appliances and equipment are: Device boxes
and junction boxes
,Q: (12) A single thermocouple may be used to supervise inputs of natural gas
appliances with inputs of up to 1 000 000 Btu/h (300 kW) if they have:
Unrestricted vertical flue passes (12) Powerpile generators are used on
appliances with which type of controls?
Answer:
Automatic- type controls (12) A thermocouple only generates a voltage when the
temperature difference between the hot and cold junction is at least: 400 F or 204 C
(12) What are the two types of Powerpiles? Coaxial and Two wire (12) Below what
millivoltage (open circuit) should a thermocouple be replaced? 20 mV (Should read
around 30) (12) Below what millivoltage (closed circuit) should a thermocouple be
replaced? 8 mV (Should read around 15) (12) The coil of the pilotstat should create
enough magnetic field to hold the valve open until the millivoltage drops between: 5
and 2 mV (12) What is the usual voltage rating for a dedicated millivolt thermostat?
0 to 1.5 V DC (12) What dose the motor thermostat directly sense? The motor
winding temperature (12) If a given motor has more poles will it turn faster or
slower? The more poles a motor has, the slower the motor will turn.
, Q: (12) What formula would be used to determine the theoretical synchronous
speed (without load) of motors in RPM?
Answer:
RPM = (Frequency x 120)/number of poles (12) What is the difference between the
motor-calculated speed and the actual speed referred to as? Motor slip (12) What is
the more widely used type of motor three-phase or single-phase? Three-phase
because of their efficiency and constant speed characteristics (12) What are the three
main types of three-phase AC motors? Squirrel cage induction, wound rotor,
synchronous (12) Which type of AC motor has the simplest construction? Squirrel
cage induction motor (12) Which type of connection subjects the windings to higher
voltage, delta or wye? Delta (12) Which phased motor requires a supplementary
device to make it self-starting? A single- phase motor (12) If you must use a new
capacitor that has a slightly different capacity than the old capacitor what are the
parameters? 5%-10% over rather than under (12) At what speed do start relays
remove the starting winding from the circuit? 75% of its normal running speed (12)
What type of device is a 'Klixon disc'? A current sensing device
