STSC Practice Exam (New 2026/ 2027
Update) Questions & Answers {Grade A}
100% Correct (Verified Solutions)
The welding crew supervisor said they would be finished in 20 minutes. The supervisor
should: (Welding 60 feet away in respirators) - Correct answer Wait the 20 min for the
welders to complete their work
Work in a confined space monitors read 15% oxygen. The workers should: - Correct
answer Evacuate, the space is oxygen deficient
On a job site, which of the following is most correct concerning Safety Data Sheets
(SDS) accessibility? - Correct answer The supervisor or crew leader must have access
and can provide a copy to the workers
Workers in a confined space with hazardous conditions should have: - Correct answer
An attendant with continuous visual communication with all entrants
,Which of the following terms best describes when to dispose of a respirator? - Correct
answer Service life
Which is the most appropriate measurement of individual safety performance? -
Correct answer Recognize workers for reporting hazards and correcting them
Upon review, the STS discovers that a case involving 3 days away from work has not
categorized correctly. The STS should: (1 Million- Man-Hours-With-No-Lost-Time) -
Correct answer Report the misclassification to the site superintendent
Which of the following most relates to the 1st standard of the STS code of ethics? -
Correct answer Hold paramount the safety and health of people and the protection of
property and environment in performance of safety responsibilities
The STS has no experience with collecting samples. The STS should: - Correct answer
Notify superintendent the STS is not qualified and recommend the company gets a
qualified person to collect samples
,Site manager requests that STS go to training to enhance skills related to safety on the
job. The STS should: - Correct answer Go to training, as per STS Code of Ethics
requiring continuous professional development
When is training least appropriate: - Correct answer At end of work shift
Who is most responsible for ensuring a union worker follows safety rules? - Correct
answer Line supervisor
Gas cylinders safety valve covers must be on at all times except when: - Correct
answer In use
If a worker is injured while performing duties assigned by the employer, the injury is
considered: - Correct answer Work related
A group of managers, supervisors are reviewing the emergency planning and
response, communications and procedures were tested, but no equipment was
, mobilized nor hands on performed. This type of experience is called a: - Correct
answer Table top
The best selection of people for a safety committee is: - Correct answer Supervisors
and line workers
Who is primary responsible for enforcing safety rules: - Correct answer Supervisor
An STS goes into area with several of unsafe conditions involving different
departments. The STS should: - Correct answer Stop work and discuss with
department supervisors
Work crew notices contractor employees in an area they are not normally working in.
The supervisor should: - Correct answer Stop work and ask contractor employees
what they are doing
Hazardous chemicals labels should be written in: - Correct answer A language and
symbols that workers can read and identify hazards
Update) Questions & Answers {Grade A}
100% Correct (Verified Solutions)
The welding crew supervisor said they would be finished in 20 minutes. The supervisor
should: (Welding 60 feet away in respirators) - Correct answer Wait the 20 min for the
welders to complete their work
Work in a confined space monitors read 15% oxygen. The workers should: - Correct
answer Evacuate, the space is oxygen deficient
On a job site, which of the following is most correct concerning Safety Data Sheets
(SDS) accessibility? - Correct answer The supervisor or crew leader must have access
and can provide a copy to the workers
Workers in a confined space with hazardous conditions should have: - Correct answer
An attendant with continuous visual communication with all entrants
,Which of the following terms best describes when to dispose of a respirator? - Correct
answer Service life
Which is the most appropriate measurement of individual safety performance? -
Correct answer Recognize workers for reporting hazards and correcting them
Upon review, the STS discovers that a case involving 3 days away from work has not
categorized correctly. The STS should: (1 Million- Man-Hours-With-No-Lost-Time) -
Correct answer Report the misclassification to the site superintendent
Which of the following most relates to the 1st standard of the STS code of ethics? -
Correct answer Hold paramount the safety and health of people and the protection of
property and environment in performance of safety responsibilities
The STS has no experience with collecting samples. The STS should: - Correct answer
Notify superintendent the STS is not qualified and recommend the company gets a
qualified person to collect samples
,Site manager requests that STS go to training to enhance skills related to safety on the
job. The STS should: - Correct answer Go to training, as per STS Code of Ethics
requiring continuous professional development
When is training least appropriate: - Correct answer At end of work shift
Who is most responsible for ensuring a union worker follows safety rules? - Correct
answer Line supervisor
Gas cylinders safety valve covers must be on at all times except when: - Correct
answer In use
If a worker is injured while performing duties assigned by the employer, the injury is
considered: - Correct answer Work related
A group of managers, supervisors are reviewing the emergency planning and
response, communications and procedures were tested, but no equipment was
, mobilized nor hands on performed. This type of experience is called a: - Correct
answer Table top
The best selection of people for a safety committee is: - Correct answer Supervisors
and line workers
Who is primary responsible for enforcing safety rules: - Correct answer Supervisor
An STS goes into area with several of unsafe conditions involving different
departments. The STS should: - Correct answer Stop work and discuss with
department supervisors
Work crew notices contractor employees in an area they are not normally working in.
The supervisor should: - Correct answer Stop work and ask contractor employees
what they are doing
Hazardous chemicals labels should be written in: - Correct answer A language and
symbols that workers can read and identify hazards
