SDI Final Presentation Exam 2025
Questions and Answers
What happens in the Entry Looper? - ANSWER-Keeps the line continuous while
welding coils
What do air knives do? - ANSWER-Helps apply the zinc coating
What's the purpose of the Zinc Pot? - ANSWER-Applies a zinc-aluminum coating
to protect steel
How is Galvanizing line different from Galvalume? - ANSWER-Different zinc-
aluminum ratio
What formula calculates horsepower? - ANSWER-HP = Torque(ft-lb) × RPM /
5252
What formula calculates torque? - ANSWER-Torque = HP × 5252 / RPM
Why was the 50hp motor replaced with a 25hp motor? - ANSWER-To eliminate
gearbox failures and provide correct RPM directly
What does Pacer HF power? - ANSWER-Strip Dryer
What does Pacer II power? - ANSWER-Zinc Pot
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, Common components to check in both? - ANSWER-Clamp Diodes, Bridge SCRs,
Input Line Fuses
What is a TCC Curve? - ANSWER-Time Current Curve showing trip time vs
current
MCC acronym - ANSWER-Motor Control Center
VFD - ANSWER-Variable Frequency Drive
HMI - ANSWER-Human-Machine Interface
Rectifier - ANSWER-Converts AC to DC
DC Bus - ANSWER-Stores and smooths DC power
Inverter - ANSWER-Converts AC to DC at variable frequency (mostly 60hz) and
voltage to control the motors speed
What section of TCC curve is overloads? - ANSWER-upper, curved portion (time)
What section of TCC curve is short circuits? - ANSWER-lower, flatter portion
(current)
Capacitors - ANSWER-Storer electricity and release it in the circuit when needed
Bridge SCR - ANSWER-Silicon Controlled Rectifier (converts AC to DC)
Clamp Diode - ANSWER-A semiconductor used to limit voltage spikes or surges
Input Line Fuses - ANSWER-safety devices
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
Questions and Answers
What happens in the Entry Looper? - ANSWER-Keeps the line continuous while
welding coils
What do air knives do? - ANSWER-Helps apply the zinc coating
What's the purpose of the Zinc Pot? - ANSWER-Applies a zinc-aluminum coating
to protect steel
How is Galvanizing line different from Galvalume? - ANSWER-Different zinc-
aluminum ratio
What formula calculates horsepower? - ANSWER-HP = Torque(ft-lb) × RPM /
5252
What formula calculates torque? - ANSWER-Torque = HP × 5252 / RPM
Why was the 50hp motor replaced with a 25hp motor? - ANSWER-To eliminate
gearbox failures and provide correct RPM directly
What does Pacer HF power? - ANSWER-Strip Dryer
What does Pacer II power? - ANSWER-Zinc Pot
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, Common components to check in both? - ANSWER-Clamp Diodes, Bridge SCRs,
Input Line Fuses
What is a TCC Curve? - ANSWER-Time Current Curve showing trip time vs
current
MCC acronym - ANSWER-Motor Control Center
VFD - ANSWER-Variable Frequency Drive
HMI - ANSWER-Human-Machine Interface
Rectifier - ANSWER-Converts AC to DC
DC Bus - ANSWER-Stores and smooths DC power
Inverter - ANSWER-Converts AC to DC at variable frequency (mostly 60hz) and
voltage to control the motors speed
What section of TCC curve is overloads? - ANSWER-upper, curved portion (time)
What section of TCC curve is short circuits? - ANSWER-lower, flatter portion
(current)
Capacitors - ANSWER-Storer electricity and release it in the circuit when needed
Bridge SCR - ANSWER-Silicon Controlled Rectifier (converts AC to DC)
Clamp Diode - ANSWER-A semiconductor used to limit voltage spikes or surges
Input Line Fuses - ANSWER-safety devices
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
