Chapter 9 · MCQ Read Mode

Safety, waste management and quality control

In the hierarchy of hazard control, personal protective equipment is regarded as

The flash point of a flammable liquid is the lowest temperature at which

A vapour-air mixture whose concentration is above the upper flammable limit

The principal difference between a deflagration and a detonation is that in a detonation

A BLEVE occurs when vapour

In a dust explosion, the secondary explosion is usually

A storage tank is most likely to collapse inwards when

The TLV-STEL of a substance refers to the permissible exposure averaged over

A substance with a lower LD50 value than another is

Carbon monoxide is classified as a

Electrostatic ignition of a flammable atmosphere is prevented principally by

Noise-induced hearing loss is particularly insidious because it

A HAZOP study is characterised by team

The international standard for occupational health and safety management systems is

The main practical value of investigating near misses is that

A low lost-time injury frequency rate at a chemical plant

Acids must never be stored alongside cyanide or sulphide salts because

A cartridge-type filtering respirator must never be used

Lockout-tagout procedures must isolate

The majority of fatalities in confined space incidents are

A hot work permit is required principally to ensure that

Management of change procedures exist because accidents

The correct sequence of the disaster management cycle is

An off-site emergency plan differs from an on-site plan in that it

Taking out insurance against a major accident

Under Nepal's Labour Act, 2074, safety equipment required for the work must be

Ground-level ozone in an urban atmosphere is classified as

Acid rain is caused principally by atmospheric emissions of

A temperature inversion over an industrial area results in

Of the following, the device least suitable for removing particles smaller than 5 micrometres is the

The collection efficiency of a cyclone separator increases as

The performance of an electrostatic precipitator is most strongly affected by

A fabric filter (baghouse) is unsuitable when the gas stream

In flue gas desulphurisation using a lime or limestone slurry, the principal solid product is

Selective catalytic reduction for the control of nitrogen oxides uses

For any given wastewater, the chemical oxygen demand is

A wastewater with a BOD to COD ratio of 0.1 is best described as

Eutrophication of a freshwater body is usually limited by the availability of

The principal environmental legislation currently governing pollution control in Nepal is the

In the waste management hierarchy, the most preferred option is

Compared with end-of-pipe treatment, source reduction is preferred because

Primary treatment of wastewater removes approximately what proportion of the BOD?

In the activated sludge process, part of the settled sludge is returned to the aeration tank in order to

Bulking in an activated sludge plant refers to

Anaerobic treatment is preferred to aerobic treatment for high-strength industrial effluents because it

Hexavalent chromium in an industrial effluent is normally treated by

Segregation of industrial effluent streams at source is recommended because stream

A waste is classified as hazardous if it exhibits

The cradle-to-grave principle for hazardous waste means that

The three Ts of effective hazardous waste incineration are

An effluent standard differs from a stream standard in that an effluent standard

In the environmental impact assessment process, the step that determines which issues and impacts should be studied in detail is called

The single most important step in an effective municipal solid waste management system is

For successful composting, the carbon-to-nitrogen ratio of the feedstock should be approximately

A sanitary landfill differs from an open dump principally in that it has

Capturing landfill gas is environmentally beneficial even when the energy is not used because

Refuse-derived fuel is particularly suitable for use in cement kilns because incorporated into the clinker

Which of the following is an example of by-product recovery rather than end-of-pipe treatment?

Cleaner production is best described as

Life cycle assessment evaluates the environmental impact of a product

ISO 14001 certification of a company confirms that

The polluter pays principle holds that

The precautionary principle states that irreversible harm

Extended producer responsibility means that

Under Nepal's Solid Waste Management Act, 2068 (2011), primary responsibility for the management of municipal solid waste rests with

The essential difference between quality control and quality assurance is that quality control is

The statement that quality cannot be inspected into a product means that

Among the four categories of quality cost, the most expensive is usually

A process that exhibits only common cause variation is described as

Control limits on a control chart are

For measured variable data, the pair of control charts normally used together is

A process capability index Cpk of 1.0 indicates that

The Pareto chart is used in quality improvement to

In acceptance sampling, the producer's risk is the probability that

A quality circle is best described as problems

The Japanese term kaizen refers to

Poka-yoke, or mistake proofing, refers to

Certification of a company to ISO 9001 means that