RED SEAL CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◍ When disassembling a hydraulic cylinder what is the first step you should
perform?
A) Disconnect the rod end cap.
B) Remove the piston from the barrel.
C) Decompress the barrel.
D) Use compressed air to fill the barrel..
Answer: Correct answer=A
◍ What should you use when removing a bearing?
A) You should use a clean cloth.
B) You should use a small hammer.
C) You should use a screwdriver.
D) You should use a chisel..
Answer: Correct answer=A
◍ Soft copper tubing is available in?
A. Large diameters
B. Small diameters
C. Straight lengths
D. Coils.
Answer: D. Coils
◍ What is an example of controlling a hazard through engineering controls?
A) Wearing ear protection.
B) A substitution of equipment to remove the hazard.
C) Limiting hours of work.
D) Dry methods as opposed to wet sanding..
Answer: Correct answer=B
,◍ Naturally aspirated engines require power duration of approximately how
many percent per 1000 feet above sea level?
A) Approximately 16 percent per 1000 feet above sea level.
B) Approximately 11 percent per 1000 feet above sea level.
C) Approximately 8.5 percent per 1000 feet above sea level.
D) Approximately 3 percent per 1000 feet above sea level..
Answer: Correct answer=D
◍ When should an engine piston be replaced?
A) It should be replaced if it is cracked.
B) It should be replaced if the wrist pin retainer grooves are not in good
shape.
C) It should be replaced if there is a lip formed on the ring land.
D) All of the above are reasons to replace it..
Answer: Correct answer =D
◍ How many U-bolt clips are required for 1.5 inch diameter rope?
A) 7
B) 6
C) 5
D) 4.
Answer: Correct answer=B
◍ What is the advantage of using a sliding fifth wheel versus a stationary fifth
wheel?
A) The advantage is moving the assembly forward allows for better
maneuverability.
B) The advantage is it is easier to transfer weight between tractor axles.
C) The advantage is the ability to accommodate trailers with different
kingpin settings.
D) The advantage is all of the above..
Answer: Correct answer =D
◍ When roughing-in for a domestic water closet, the flange should be installed
_____ mm to the center from the finished wall.
, A. 350
B. 250
C. 400
D. 300.
Answer: D. 300
◍ Increasing the lever length on a torque wrench will do what to the torque
applied?
A) It will increase the torque.
B) It will decrease the torque.
C) It will maintain the torque..
Answer: Correct answer=A
◍ Which of the following is an example of contamination in a hydraulic
system?
A) Components appear to be sandblasted.
B) There are cracks in the motor parts.
C) The piston is slightly bent.
D) The cylinder operates at a high speed..
Answer: Correct answer=A
◍ When fast charging a 12 Volt battery the applied voltage should not rise
above how many Volts?
A) It should not rise above 18.8
V. B) It should not rise above 16.1
V. C) It should not rise above 15.5
V. D) It should not rise above 13.7
V. .
Answer: Correct answer =C
◍ The air filter for a typical forced-air heating system is installed between the:.
Answer: blower fan and the cold-air return plenum.
◍ Which boiler can be classified as a high mass boiler?.
Answer: cast iron sectional boiler
, ◍ If you are to clean a cast iron engine part by the use of a high-temperature
oven you must bake the part at 260 degrees Celsius for how many hours?
A) You must bake it for 1 to 2 hours.
B) You must bake it for 2 to 3 hours.
C) You must bake it for 3 to 4 hours.
D) You must bake it for 5 to 6 hours..
Answer: Correct answer =D
◍ 257. A weak carbonic acid is formed when groundwater absorbs:
A. Carbon dioxide
B. Oxygen
C. Hydrogen
D. Silt.
Answer: A. Carbon dioxide
◍ What percentage of tasks are related to using tools and equipment for an
Industrial Mechanic (Millwright)?.
Answer: 21%
◍ When referring to heavy-duty diesel engines, the EGR valve will close to
allow exhaust gas to enter the intake manifold.
A) True
B) False.
Answer: Correct answer=B
◍ Which is the most effective diesel heater?
A) The circulating diesel heater is the most effective.
B) The immersion type diesel heater is the most effective..
Answer: Correct answer=A
◍ What is the goal of the NOA workshop?.
Answer: to identify the major tasks and subtasks for the trade and develop a
general overview of the trade that describes the work of the trade and skills
necessary to be successful in the trade
◍ What is the volumetric efficiency of a pump that has a theoretical flow rate
QUESTIONS WITH SOLUTIONS GRADED A+
◍ When disassembling a hydraulic cylinder what is the first step you should
perform?
A) Disconnect the rod end cap.
B) Remove the piston from the barrel.
C) Decompress the barrel.
D) Use compressed air to fill the barrel..
Answer: Correct answer=A
◍ What should you use when removing a bearing?
A) You should use a clean cloth.
B) You should use a small hammer.
C) You should use a screwdriver.
D) You should use a chisel..
Answer: Correct answer=A
◍ Soft copper tubing is available in?
A. Large diameters
B. Small diameters
C. Straight lengths
D. Coils.
Answer: D. Coils
◍ What is an example of controlling a hazard through engineering controls?
A) Wearing ear protection.
B) A substitution of equipment to remove the hazard.
C) Limiting hours of work.
D) Dry methods as opposed to wet sanding..
Answer: Correct answer=B
,◍ Naturally aspirated engines require power duration of approximately how
many percent per 1000 feet above sea level?
A) Approximately 16 percent per 1000 feet above sea level.
B) Approximately 11 percent per 1000 feet above sea level.
C) Approximately 8.5 percent per 1000 feet above sea level.
D) Approximately 3 percent per 1000 feet above sea level..
Answer: Correct answer=D
◍ When should an engine piston be replaced?
A) It should be replaced if it is cracked.
B) It should be replaced if the wrist pin retainer grooves are not in good
shape.
C) It should be replaced if there is a lip formed on the ring land.
D) All of the above are reasons to replace it..
Answer: Correct answer =D
◍ How many U-bolt clips are required for 1.5 inch diameter rope?
A) 7
B) 6
C) 5
D) 4.
Answer: Correct answer=B
◍ What is the advantage of using a sliding fifth wheel versus a stationary fifth
wheel?
A) The advantage is moving the assembly forward allows for better
maneuverability.
B) The advantage is it is easier to transfer weight between tractor axles.
C) The advantage is the ability to accommodate trailers with different
kingpin settings.
D) The advantage is all of the above..
Answer: Correct answer =D
◍ When roughing-in for a domestic water closet, the flange should be installed
_____ mm to the center from the finished wall.
, A. 350
B. 250
C. 400
D. 300.
Answer: D. 300
◍ Increasing the lever length on a torque wrench will do what to the torque
applied?
A) It will increase the torque.
B) It will decrease the torque.
C) It will maintain the torque..
Answer: Correct answer=A
◍ Which of the following is an example of contamination in a hydraulic
system?
A) Components appear to be sandblasted.
B) There are cracks in the motor parts.
C) The piston is slightly bent.
D) The cylinder operates at a high speed..
Answer: Correct answer=A
◍ When fast charging a 12 Volt battery the applied voltage should not rise
above how many Volts?
A) It should not rise above 18.8
V. B) It should not rise above 16.1
V. C) It should not rise above 15.5
V. D) It should not rise above 13.7
V. .
Answer: Correct answer =C
◍ The air filter for a typical forced-air heating system is installed between the:.
Answer: blower fan and the cold-air return plenum.
◍ Which boiler can be classified as a high mass boiler?.
Answer: cast iron sectional boiler
, ◍ If you are to clean a cast iron engine part by the use of a high-temperature
oven you must bake the part at 260 degrees Celsius for how many hours?
A) You must bake it for 1 to 2 hours.
B) You must bake it for 2 to 3 hours.
C) You must bake it for 3 to 4 hours.
D) You must bake it for 5 to 6 hours..
Answer: Correct answer =D
◍ 257. A weak carbonic acid is formed when groundwater absorbs:
A. Carbon dioxide
B. Oxygen
C. Hydrogen
D. Silt.
Answer: A. Carbon dioxide
◍ What percentage of tasks are related to using tools and equipment for an
Industrial Mechanic (Millwright)?.
Answer: 21%
◍ When referring to heavy-duty diesel engines, the EGR valve will close to
allow exhaust gas to enter the intake manifold.
A) True
B) False.
Answer: Correct answer=B
◍ Which is the most effective diesel heater?
A) The circulating diesel heater is the most effective.
B) The immersion type diesel heater is the most effective..
Answer: Correct answer=A
◍ What is the goal of the NOA workshop?.
Answer: to identify the major tasks and subtasks for the trade and develop a
general overview of the trade that describes the work of the trade and skills
necessary to be successful in the trade
◍ What is the volumetric efficiency of a pump that has a theoretical flow rate
