EHS409



Email: bbcnoun@gmail.com
Whatsapp: 08131667008


One of the devices used in secondary treatment of wastewater include:
Answer: trickling filters

	results form the ingestion of
exotoxin secreted by bacterial cells growing on food
Answer: food intoxication

The four components of waste-water are the following except:
Answer: other chemicals

Disinfection or destruction of pathogenic organisms can be achieved using
Answer: chlorine

The presence of these organisms in a water body indicates faecal contamination.
Answer: faecal coliforms

	Is the opening of an ager plate and
exposing it to air for sampling
Answer: deposition

Canning destroys which spores
Answer: c. botulinum

Give the microbial food enzyme produced by Aspergillus
Answer: amylase

One of the methods used to control microorganisms of indoor air is	
Answer: radiation

Thrive in both aerobic and
anaerobic conditions.
Answer: facltative

	The following are water-bom
pathogens except
Answer: hepatitis b virus

	results from the ingestion of
microorganism that causes gastrointestinal disorders
Answer: food infection

	is a process for treating sewage and
industrial waste water using air and a biological floe composed of bacteria and protozoans
Answer: activated sludge

Thrive in aerobic conditions.
Answer: aerobes

some air sampling devices are as follows except:
Answer: sedimentation basin

	is the study of small organisms which
are too small to be seen with the unaided eyes.
Answer: microbiology

	Is the trapping of airborne particles
in liquid matrix
Answer: impingement

	is the quantity of dissolved oxygen
consumed by microorganisms during the breakdown of organic carbon in a wastewater sample during an incubation period of 5 days at 20°C.
Answer: cbod

Cabinets are used to control the
spread of airborne microbes
Answer: vacuum

The devices that are commonly used in wastewater include the following except:
Answer: scissors




Email: bbcnoun@gmail.com
Whatsapp: 08131667008