MECHANICAL EXAM TECHNOLOGIST
GRADE 1 QUESTION BANK 2026
TECHNICAL OPERATIONS REVIEW
UPDATED A+
◉ What is an Alternating Current?
Answer: Alternating current (AC) is an electric current that
periodically reverses direction and changes its magnitude
continuously with time12. It is in contrast to direct current (DC),
which flows only in one direction.
Most devices connected to the electrical grid operate on AC.
Appliances like refrigerators, air conditioners, washing machines,
vacuum cleaners, computers, and televisions run on AC power.
Electrical outlets in homes and commercial areas also supply AC.
DC is less common for household appliances. However, some
devices, like battery-powered gadgets (e.g., laptops, cell phones), use
DC directly.
◉ What is a single phase current?
Answer: Single-phase power is a two-wire alternating current (AC)
circuit. It typically consists of one power wire (the phase wire) and
one neutral wire. Current flows between the power wire (through
the load) and the neutral wire. Single-phase power is commonly
used for lighting and heating, rather than large electric motors
,◉ What is a solenoid type tester?
Answer: A type of tester for electrical power circuits
◉ What is an ohmmeter?
Answer: A type of tester that measures electrical resistance
◉ What is a potentiometer?
Answer: A device that measures electric potential (voltage)
◉ What is the purpose of an electrical interlock switch on panel
doors?
Answer: To interrupt local power for personal protection
◉ What is the purpose of installing toe boards around the base
where guard rails are placed along elevated work areas?
Answer: As protection from tools or objects that may roll off
◉ What action is necessary before restarting rotating equipment
that has recently undergone repair?
Answer: All removed guards must be re-installed
, ◉ What is the main purpose of a confined space safety permit?
Answer: It ensures the use of safety precautions and safe procedures
◉ What does LOTO stand for?
Answer: lockout/tagout
◉ What does the acronym SDS mean?
Answer: Safety Data Sheet
◉ When leaving a remote lift station, why is it important to secure
the station?
Answer: To prevent vandalism or unauthorized entry and possible
injury to trespassers
◉ What is the purpose of a breakaway switch?
Answer: To apply the brakes on a trailer in the event of a trailer
release from a vehicle
◉ Heavy objects are made mostly of what kind of metals?
Answer: Iron and steel
◉ NPT threads need to be _____________ to provide a pressure tight
and water tight seal
GRADE 1 QUESTION BANK 2026
TECHNICAL OPERATIONS REVIEW
UPDATED A+
◉ What is an Alternating Current?
Answer: Alternating current (AC) is an electric current that
periodically reverses direction and changes its magnitude
continuously with time12. It is in contrast to direct current (DC),
which flows only in one direction.
Most devices connected to the electrical grid operate on AC.
Appliances like refrigerators, air conditioners, washing machines,
vacuum cleaners, computers, and televisions run on AC power.
Electrical outlets in homes and commercial areas also supply AC.
DC is less common for household appliances. However, some
devices, like battery-powered gadgets (e.g., laptops, cell phones), use
DC directly.
◉ What is a single phase current?
Answer: Single-phase power is a two-wire alternating current (AC)
circuit. It typically consists of one power wire (the phase wire) and
one neutral wire. Current flows between the power wire (through
the load) and the neutral wire. Single-phase power is commonly
used for lighting and heating, rather than large electric motors
,◉ What is a solenoid type tester?
Answer: A type of tester for electrical power circuits
◉ What is an ohmmeter?
Answer: A type of tester that measures electrical resistance
◉ What is a potentiometer?
Answer: A device that measures electric potential (voltage)
◉ What is the purpose of an electrical interlock switch on panel
doors?
Answer: To interrupt local power for personal protection
◉ What is the purpose of installing toe boards around the base
where guard rails are placed along elevated work areas?
Answer: As protection from tools or objects that may roll off
◉ What action is necessary before restarting rotating equipment
that has recently undergone repair?
Answer: All removed guards must be re-installed
, ◉ What is the main purpose of a confined space safety permit?
Answer: It ensures the use of safety precautions and safe procedures
◉ What does LOTO stand for?
Answer: lockout/tagout
◉ What does the acronym SDS mean?
Answer: Safety Data Sheet
◉ When leaving a remote lift station, why is it important to secure
the station?
Answer: To prevent vandalism or unauthorized entry and possible
injury to trespassers
◉ What is the purpose of a breakaway switch?
Answer: To apply the brakes on a trailer in the event of a trailer
release from a vehicle
◉ Heavy objects are made mostly of what kind of metals?
Answer: Iron and steel
◉ NPT threads need to be _____________ to provide a pressure tight
and water tight seal
