Take Hazardous Goods Transport (China) Practice Questions - China Road Hazardous Goods Transport Qualification Examination (道路危险货物运输从业人员从业资格考试) Exam

QUESTION 1 / 25

According to the Classification and Code of Dangerous Goods (GB 6944-2012) and the List of Dangerous Goods (GB 12268-2012), into how many hazard classes are dangerous goods divided for road transportation?

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A9 primary hazard classes✓B7 primary hazard classes✓C12 primary hazard classes✓D5 primary hazard classes✓

QUESTION 2 / 25

Under GB 6944-2012, which of the following explosive divisions comprises substances and articles that present a mass explosion hazard (整体爆炸危险) affecting virtually the entire load instantaneously?

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ADivision 1.1✓BDivision 1.2✓CDivision 1.3✓DDivision 1.4✓

QUESTION 3 / 25

Consumer fireworks, small arms cartridges, and distress flares classified under Division 1.4 are characterized primarily by which hazard profile during transport?

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AThey present no significant blast hazard, and explosive effects are largely confined to the package✓BThey detonate instantaneously with intense shockwaves capable of collapsing adjacent bridge structures✓CThey release dense clouds of highly toxic systemic blood poisons upon combustion✓DThey spontaneously ignite upon contact with ambient humidity at room temperature✓

QUESTION 4 / 25

Which of the following gases is classified under Division 2.1 Flammable Gases (易燃气体) under GB 6944-2012 and JT/T 617.2?

Choose one answer below.

ALiquefied Petroleum Gas (液化石油气, UN 1075)✓BCompressed Nitrogen (压缩氮气, UN 1066)✓CLiquid Chlorine (液氯, UN 1017)✓DCarbon Dioxide (二氧化碳, UN 1013)✓

QUESTION 5 / 25

When transporting refrigerated liquefied cryogenic gases classified under Division 2.2 (such as Liquid Nitrogen UN 1977 or Liquid Argon UN 1951), what is the primary occupational health and safety hazard in an enclosed compartment or low-lying space?

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ARapid asphyxiation (窒息) resulting from oxygen displacement as the cryogenic liquid vaporizes and expands hundreds of times in volume✓BViolent chemical polymerization releasing flammable hydrocarbon vapors✓CSpontaneous detonation caused by mechanical road vibration✓DImmediate bioaccumulation and systemic carcinogenicity upon skin contact✓

QUESTION 6 / 25

Under GB 6944-2012, what is the statutory lethal concentration threshold (LC50) for a gas to be classified under Division 2.3 Toxic Gases (毒性气体)?

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AInhalation LC50 (lethal concentration for 50% test population over 4 hours) of not more than 5,000 mL/m³ (ppm)✓BInhalation LC50 of not more than 20,000 mL/m³ (ppm)✓CInhalation LC50 of not more than 50,000 mL/m³ (ppm)✓DInhalation LC50 of not more than 100 mL/m³ (ppm)✓

QUESTION 7 / 25

Under GB 6944-2012 and JT/T 617.2, what is the closed-cup flash point (闭杯闪点) upper limit for a substance to be classified as a Class 3 Flammable Liquid (易燃液体)?

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AClosed-cup flash point not greater than 60°C✓BClosed-cup flash point not greater than 93°C✓CClosed-cup flash point not greater than 23°C✓DClosed-cup flash point not greater than 100°C✓

QUESTION 8 / 25

How are Packing Groups (包装类别) assigned to Class 3 Flammable Liquids according to their flash point and initial boiling point under JT/T 617.2?

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APacking Group I: Initial boiling point ≤ 35°C; Packing Group II: Flash point < 23°C and initial boiling point > 35°C; Packing Group III: Flash point 23°C to 60°C and initial boiling point > 35°C✓BPacking Group I: Flash point < 0°C; Packing Group II: Flash point 0°C to 50°C; Packing Group III: Flash point > 50°C✓CPacking Group I: Flash point < 23°C; Packing Group II: Flash point 23°C to 60°C; Packing Group III: Flash point 60°C to 93°C✓DPacking Group I: Initial boiling point > 100°C; Packing Group II: Initial boiling point 50°C to 100°C; Packing Group III: Initial boiling point < 50°C✓

QUESTION 9 / 25

Commercial diesel fuel (柴油) transported in bulk road tankers in China is officially assigned to which UN Number and hazard classification?

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AUN 1202, Class 3 Flammable Liquid (Packing Group III)✓BUN 1203, Class 3 Flammable Liquid (Packing Group I)✓CUN 1993, Class 9 Miscellaneous Dangerous Substance✓DUN 3082, Class 8 Corrosive Liquid✓

QUESTION 10 / 25

Which of the following substances is classified under Division 4.1 Flammable Solids (易燃固体) under GB 6944-2012?

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ARed Phosphorus (红磷, UN 1338)✓BWhite Phosphorus (白磷, UN 1381)✓CMetallic Sodium (金属钠, UN 1428)✓DPotassium Permanganate (高锰酸钾, UN 1490)✓

QUESTION 11 / 25

What is the key distinguishing hazard property of Division 4.2 Substances Liable to Spontaneous Combustion (易于自燃的物质) compared to Division 4.1 solids?

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AThey can ignite spontaneously without an external spark or flame through reaction with oxygen in air (pyrophoric) or through self-heating✓BThey only ignite when exposed to direct open electrical arcing exceeding 1,000 volts✓CThey dissolve non-metallic packaging materials within 5 minutes of contact✓DThey emit lethal radioactive particles when compressed under mechanical weight✓

QUESTION 12 / 25

Calcium Carbide (碳化钙/电石, UN 1402) is classified under Division 4.3 because when it comes into contact with water or atmospheric moisture, it undergoes a chemical reaction that releases which dangerous flammable gas?

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AAcetylene (乙炔)✓BCarbon Monoxide (一氧化碳)✓CChlorine Gas (氯气)✓DSulfur Dioxide (二氧化硫)✓

QUESTION 13 / 25

What is the primary dangerous property of Division 5.1 Oxidizing Substances (氧化性物质, e.g. Hydrogen Peroxide UN 2014, Ammonium Nitrate UN 1942)?

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AAlthough not necessarily combustible themselves, they readily yield oxygen to initiate or intensify the burning of other combustible materials✓BThey generate strong alkaline vapors that turn surrounding water supplies acidic within seconds✓CThey absorb ambient oxygen rapidly to extinguish all open flames in a compartment✓DThey emit powerful penetrating gamma radiation that degrades nearby electrical wiring✓

QUESTION 14 / 25

For Class 5.2 Organic Peroxides (有机过氧化物), what does the critical parameter SADT (Self-Accelerating Decomposition Temperature / 自加速分解温度) represent?

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AThe lowest ambient temperature at which self-accelerating decomposition may occur in a substance in the packaging as used in transport✓BThe temperature at which the liquid boils and converts into a non-hazardous solid phase✓CThe highest temperature at which the product can be safely frozen without cracking the steel container✓DThe flash point of the solvent used to dilute the organic peroxide✓

QUESTION 15 / 25

Under GB 6944-2012, what are the acute oral toxicity (经口毒性) criteria for assigning solid or liquid toxic substances to Class 6.1 Packing Group I (High Danger)?

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AOral LD50 ≤ 5 mg/kg✓BOral LD50 > 5 mg/kg and ≤ 50 mg/kg✓COral LD50 > 50 mg/kg and ≤ 300 mg/kg✓DOral LD50 > 500 mg/kg and ≤ 2,000 mg/kg✓

QUESTION 16 / 25

Under Division 6.2 Infectious Substances (感染性物质), how are Category A infectious substances (UN 2814 and UN 2900) distinguished from Category B biological substances (UN 3373)?

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ACategory A substances are capable of causing permanent disability, life-threatening or fatal disease in otherwise healthy humans or animals when exposure occurs✓BCategory A substances consist only of non-pathogenic food additives transported in sterile insulated vans✓CCategory B substances have a mandatory flash point below 23°C and require explosive placards✓DCategory A substances cannot be transported by road vehicles under any circumstance in China✓

QUESTION 17 / 25

In Class 7 Radioactive Material (放射性物质) road transportation, what is the 'Transport Index' (TI / 运输指数)?

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AA dimensionless single number assigned to a package to provide control over radiation exposure, calculated from the maximum radiation level at 1 meter from the package surface✓BThe total weight of uranium or cobalt payload expressed in metric tons✓CThe maximum speed in km/h at which the radioactive transport vehicle is legally permitted to travel✓DThe temperature difference between the package core and ambient atmospheric air✓

QUESTION 18 / 25

Which of the following radioactive material packaging types is designed to withstand severe hypothetical transport accident conditions (including high-speed impact, drop tests, 800°C fire engulfment, and deep water immersion) without loss of integrity?

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AType B Package (Type B(U) / Type B(M))✓BExcepted Package (例外包装)✓CType A Package (A型包装)✓DIndustrial Package Type 1 (IP-1)✓

QUESTION 19 / 25

Under GB 6944-2012, what are the primary defining criteria for Class 8 Corrosive Substances (腐蚀性物质)?

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ASubstances that cause irreversible full-thickness destruction of intact skin tissue within an observation period up to 14 days following an exposure of up to 4 hours, or exhibit a corrosion rate exceeding 6.25 mm/year on steel or aluminum surfaces✓BSubstances that react with water to emit dense clouds of non-toxic nitrogen gas✓CSubstances with an auto-ignition temperature below 15°C under standard atmospheric pressure✓DSubstances that generate magnetic fields strong enough to deflect commercial compasses by > 45 degrees✓

QUESTION 20 / 25

Why is it strictly forbidden under JT/T 617.6 to load Class 8 acidic corrosives (e.g. Sulfuric Acid UN 1830) together in the same vehicle compartment with Class 8 alkaline corrosives (e.g. Sodium Hydroxide solution UN 1824)?

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AAcid-base contact triggers violent exothermic neutralization reactions, potentially causing explosive boiling, vessel rupture, and corrosive splattering✓BAlkaline substances permanently absorb all acid odors, making leak detection impossible✓CThe combination forms inert table salt that loses all industrial commercial value during transit✓DThe mixed vapors create high-frequency ultrasonic waves that interfere with vehicle ABS sensors✓

QUESTION 21 / 25

Lithium-ion batteries transported separately as cargo are classified under Class 9 Miscellaneous Dangerous Substances under which UN Number in GB 12268-2012 and JT/T 617.2?

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AUN 3480 (Lithium ion batteries)✓BUN 1203 (Motor spirit)✓CUN 1075 (Liquefied petroleum gas)✓DUN 3082 (Environmentally hazardous substance, liquid)✓

QUESTION 22 / 25

Under GB 6944-2012 and JT/T 617.2, liquid substances transported or offered for transport at temperatures at or above 100°C (such as liquid asphalt / molten bitumen) are classified under which Class 9 UN Number?

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AUN 3257 (Elevated temperature liquid, n.o.s.)✓BUN 3077 (Environmentally hazardous substance, solid, n.o.s.)✓CUN 1999 (Tars, liquid)✓DUN 3258 (Elevated temperature solid, n.o.s.)✓

QUESTION 23 / 25

What is the primary characteristic of substances designated as Environmentally Hazardous Substances (环境有害物质 / Marine Pollutants) assigned to UN 3077 (Solid) and UN 3082 (Liquid)?

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AThey pose acute or long-term aquatic toxicity (water pollution) causing severe harm to fish, daphnia, or algae ecosystems if spilled✓BThey corrode vehicle tires instantly upon contact within 3 seconds✓CThey explode violently whenever exposed to direct sunlight above 25°C✓DThey release radioactive radon gas during normal road driving✓

QUESTION 24 / 25

What is a UN Number (联合国危险货物编号) as defined in the List of Dangerous Goods (GB 12268-2012)?

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AA standardized four-digit Arabic numeral assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods to uniquely identify a substance or article✓BA six-digit postal code identifying the chemical manufacturing plant's county location✓CThe license plate number of the hazardous goods transport vehicle issued by the traffic police✓DThe telephone number of the municipal environmental protection emergency response team✓

QUESTION 25 / 25

On the top half of an orange rectangular hazard identification panel (Kemler code / 危险识别号) on a tank vehicle, what does the doubling of a figure (such as '33' or '88') signify under JT/T 617.5?

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AAn intensification of that particular hazard (e.g., '33' means highly flammable liquid; '88' means highly corrosive substance)✓BThat the tank contains two separate compartments with identical chemicals✓CThat the vehicle is carrying twice the legal payload limit✓DThat the transport route passes through two different provincial jurisdictions✓