100+ Free NIOSH SHO Hazard Control Practice Questions

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Sample NIOSH SHO Hazard Control Practice Questions

Try these sample questions to test your NIOSH SHO Hazard Control exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What does the acronym HIRARC stand for in the context of Malaysian occupational safety and health management?

A.Hazard Isolation, Risk Analysis, and Regulation Compliance

B.Hazard Identification, Risk Assessment, and Risk Control

C.Health Inspection, Risk Avoidance, and Report Creation

D.Hazard Intervention, Risk Auditing, and Resource Control

Explanation: HIRARC stands for Hazard Identification, Risk Assessment, and Risk Control. It is a systematic tool used in Malaysia to identify hazards, assess their risks, and implement control measures to prevent accidents and illnesses at the workplace.

2Which of the following is classified as an ergonomic hazard under the Guidelines for Hazard Identification, Risk Assessment and Risk Control (HIRARC)?

A.A high-noise environment exceeding 85 dBA

B.Exposure to toxic solvents like benzene

C.Repetitive lifting of heavy boxes in awkward postures

D.Unguarded rotating shafts on a lathe machine

Explanation: Repetitive lifting of heavy loads in awkward postures is classified as an ergonomic hazard because it strains the musculoskeletal system. Ergonomic hazards involve workstation design, repetitive tasks, manual handling, and poor postures.

3According to the Hierarchy of Controls, which control measure is considered the most effective for mitigating risk?

A.Elimination of the hazard at its source

B.Engineering controls like local exhaust ventilation

C.Providing workers with suitable personal protective equipment

D.Implementing administrative controls such as safety training

Explanation: Elimination is the most effective control measure because it completely removes the hazard, thereby eliminating the risk of exposure. Other controls only manage or reduce exposure, but the hazard remains present in the workplace.

4In a standard HIRARC assessment, how is the Risk level mathematically calculated?

A.Risk = Severity + Likelihood

B.Risk = Likelihood × Severity

C.Risk = Exposure / Threshold Limit Value

D.Risk = Hazard Severity − Control Effectiveness

Explanation: Risk is calculated by multiplying the Likelihood of an event occurring by the Severity of the resulting injury or illness (Risk = Likelihood × Severity). This numerical value helps prioritize which hazards require immediate corrective action.

5Using the DOSH Malaysia HIRARC Guidelines, what does a likelihood rating of 5 typically represent?

A.The event is practically impossible and has never occurred.

B.The event could occur but is highly unlikely under normal circumstances.

C.The event is most likely to occur frequently or is expected to happen regularly.

D.The event has occurred once in the history of the industry.

Explanation: A likelihood rating of 5 in the standard DOSH HIRARC guidelines represents an event that is most likely to occur or is expected to happen frequently under normal operating conditions. This indicates a high probability of occurrence.

6In the DOSH HIRARC Guidelines severity rating scale, a consequence resulting in approximately one single fatality is classified under which severity level?

A.Minor (Level 2)

B.Serious (Level 3)

C.Fatal (Level 4)

D.Catastrophic (Level 5)

Explanation: In the DOSH HIRARC Guidelines (2008) severity scale, Level 4 (Fatal) corresponds to approximately one single fatality with major property damage. Level 5 (Catastrophic) is reserved for incidents causing numerous (multiple) fatalities and irrecoverable damage, so a single fatality is rated Level 4, not Level 5.

7If a risk assessment yields a Risk rating of "High" (e.g., a score of 15 or above on a 5x5 matrix), what is the required operational action?

A.Operations may continue, but risk controls must be reviewed at the next annual audit.

B.No immediate action is needed, but the risk must be documented in the safety register.

C.Immediate action must be taken to manage the risk, and work should be suspended if controls cannot be put in place.

D.Personal protective equipment must be doubled, but work processes can continue unchanged.

Explanation: A "High" risk rating requires immediate action to reduce the risk to an acceptable level. If controls cannot be implemented immediately to reduce the risk, work must be suspended until adequate controls are established.

8Which hazard identification technique involves dividing a job into individual sequential steps and analyzing the hazards of each step?

A.Hazard and Operability Study (HAZOP)

B.Job Safety Analysis (JSA)

C.Failure Mode and Effects Analysis (FMEA)

D.Fault Tree Analysis (FTA)

Explanation: Job Safety Analysis (JSA), also known as Job Hazard Analysis (JHA), is a method that breaks down a specific job into sequential steps, identifies hazards at each step, and develops controls for those hazards. It is highly practical for worker-level tasks.

9Installing an acoustic enclosure around a noisy compressor is an example of which type of control in the Hierarchy of Controls?

A.Substitution

B.Administrative Control

C.Engineering Control

D.Personal Protective Equipment

Explanation: An acoustic enclosure is an engineering control because it physically modifies the workplace or equipment to isolate the noise hazard from the workers. It addresses the hazard path rather than relying on individual behavior.

10Implementing job rotation to limit a worker's exposure to hand-arm vibration is classified under which type of risk control?

A.Engineering Control

B.Substitution

C.Administrative Control

D.Elimination

Explanation: Job rotation is an administrative control because it manages exposure by altering work schedules, procedures, or organization. It does not remove the vibration hazard itself, but reduces the duration of exposure for individual workers.

About the NIOSH SHO Hazard Control Exam

The NIOSH Safety and Health Officer (SHO) certification is the premier safety qualification in Malaysia, regulated under the Occupational Safety and Health Act 1994. The Hazard Control module and exam test the candidate's technical knowledge and ability to recognize, evaluate, and control safety and health hazards. Key topics include HIRARC, machinery safety, electrical safety, fire prevention, chemical safety under the USECHH Regulations, confined spaces, physical hazards (noise, thermal, vibration), ergonomics, and personal protective equipment (PPE).

Assessment

Multiple-choice theory questions covering hazard identification, physical and chemical risk controls, machinery safeguarding, and electrical, fire, confined space, and ergonomic hazards under Malaysian OSH regulations.

Time Limit

2 hours and 30 minutes (150 minutes) per theory paper.

Passing Score

A minimum score of 55% in each of the exam papers is required to pass.

Exam Fee

RM950 for all four papers (Paper 1: RM250, Paper 2: RM250, Paper 3: RM150, Paper 4 Part 1: RM100, Paper 4 Part 2: RM200). (National Institute of Occupational Safety and Health (NIOSH) Malaysia)

NIOSH SHO Hazard Control Exam Content Outline

12%

HIRARC Methodology

Hazard Identification, Risk Assessment, and Risk Control principles, risk rating matrices, and the application of the Hierarchy of Controls.

11%

Machinery Safety

Mechanical hazards, machine safeguarding methods, Factories and Machinery Act (FMA) 1967 fencing rules, and maintenance safety.

11%

Electrical Safety

Electrical hazards, grounding and earthing systems, double insulation, lockout/tagout (LOTO) protocols, and electric shock first aid.

11%

Fire Safety

Chemistry of fire, active and passive fire protection systems, classifications of fire and fire extinguishers, and emergency evacuation.

11%

Chemical Safety & USECHH

USECHH Regulations 2000, CLASS Regulations 2013, Chemical Health Risk Assessment (CHRA), Safety Data Sheets (SDS), and local exhaust ventilation.

11%

Confined Space Safety

Industry Code of Practice for Safe Working in a Confined Space 2010, entry permit systems, gas testing, and entrant/standby duties.

11%

Physical Hazards Control

Noise exposure limit regulations, vibration exposure prevention, heat stress/thermal management, and ionizing/non-ionizing radiation controls.

11%

Occupational Ergonomics

Ergonomics risk assessment, Musculoskeletal Disorders (MSDs), manual handling safety, and work station design.

11%

Personal Protective Equipment

Legal duties of employers/employees, PPE selection criteria, respiratory protection programs, hearing conservation, and PPE maintenance.

How to Pass the NIOSH SHO Hazard Control Exam

What You Need to Know

Passing score: A minimum score of 55% in each of the exam papers is required to pass.
Assessment: Multiple-choice theory questions covering hazard identification, physical and chemical risk controls, machinery safeguarding, and electrical, fire, confined space, and ergonomic hazards under Malaysian OSH regulations.
Time limit: 2 hours and 30 minutes (150 minutes) per theory paper.
Exam fee: RM950 for all four papers (Paper 1: RM250, Paper 2: RM250, Paper 3: RM150, Paper 4 Part 1: RM100, Paper 4 Part 2: RM200).

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NIOSH SHO Hazard Control Study Tips from Top Performers

1Master the Hierarchy of Control: always prioritize Elimination, Substitution, and Engineering Controls over administrative controls and PPE.

2Understand the difference between chemical management regulations: CLASS Regulations 2013 focus on chemical classification and labelling, while USECHH Regulations 2000 focus on usage, exposure control, and risk assessments (CHRA) in the workplace.

3Be clear on confined space roles: the Authorised Entrant performs the work, while the Standby Person monitors conditions from the outside and never enters unless fully equipped for rescue operations.

Frequently Asked Questions

What is the passing score for the NIOSH SHO exam?

Candidates must achieve a minimum score of 55% on each of the exam papers (Paper 1, Paper 2, Paper 3, and Paper 4) to pass the Safety and Health Officer certification.

What are the main legislation covered under SHO Hazard Control?

The primary legislation includes the Occupational Safety and Health Act 1994, the Factories and Machinery Act 1967, and their subsidiaries such as the USECHH Regulations 2000 and the CLASS Regulations 2013.

How long is the NIOSH SHO exam completion validity window?

Once you register and sit for the exam, you have a period of 2 years to pass all four papers of the Safety and Health Officer examination.