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Hygiene and Ecology Test 1- 3rd Year- Sem 1- PMU

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Hygiene and Ecology Test 1- 3rd Year- Sem 1- PMU

Question 1 of 50

1

Hygiene is one of the main objects of the preventive medicine

Select one of the following:

True
False

Explanation

Question 2 of 50

1

What is a hygienic norm?

Select one of the following:

a law document about the quality indices of environmental factors
the maximal or minimal physiologically safe levels of environmental factors

Explanation

Question 3 of 50

1

The main branches of hygiene are:

Select one or more of the following:

childhood and adolescent hygiene
occupational medicine
epidemiology
hygiene of nutrition

Explanation

Question 4 of 50

1

The specific methods of hygiene are:

Select one or more of the following:

sanitary description
sanitary investigation
biochemical method
complex hygienic method

Explanation

Question 5 of 50

1

Which are the types of health control?

Select one of the following:

current
preliminary
preliminary and current

Explanation

Question 6 of 50

1

The monitoring of drinking water is

Select one of the following:

periodical
permanent
periodical and permanent

Explanation

Question 7 of 50

1

The permanent manicuring of drinking water includes:

Select one or more of the following:

organoleptic analysis
physical and chemical indices
epidemiological indices
microbiological indices

Explanation

Question 8 of 50

1

The hardness of water depends on the content of:

Select one of the following:

calcium and magnesium
iron and manganese

Explanation

Question 9 of 50

1

The hardness of water is expressed by mini-equivalent per liter (meqV/l)

Select one of the following:

True
False

Explanation

Question 10 of 50

1

The organoleptic indices of drinking water are:

Select one or more of the following:

color, taste, hardness, colony counts
color, taste, odor, turbidity
color, taste, odor, hardness

Explanation

Question 11 of 50

1

Indicate the laboratory analysis for the drinking water quality according to Instruction No. 9 / 2001 year:

Select one or more of the following:

organoleptic indices
microbiological indices
epidemiological indices
physical and chemical indices
radiological indices

Explanation

Question 12 of 50

1

Water odor should be no more than 2 bales at temperature of 20°C

Select one of the following:

True
False

Explanation

Question 13 of 50

1

Which is the hygienic norm for the nitrate content in drinking water?

Select one of the following:

50 mg/l
100 mg/l
0.5 mg/l

Explanation

Question 14 of 50

1

Nitrites are indicators for recent organic pollution of water

Select one of the following:

True
False

Explanation

Question 15 of 50

1

Which elements and compounds have influence on the organoleptic indices of drinking water?

Select one or more of the following:

ammonia and nitrite
chlorides and sulfate
iron
calcium and magnesium
nitrate

Explanation

Question 16 of 50

1

What is oxidation?

Select one or more of the following:

This is the oxygen in 1 liter water
This is the oxygen, necessary for the oxidation of organic substances in 1 liter water
This is the organic matter in 1 liter water

Explanation

Question 17 of 50

1

The water pH determination may be measured with:

Select one or more of the following:

pH-meter
pH-indicator paper
Merck-colorimetric pH test

Explanation

Question 18 of 50

1

Which is the hygienic norm of the residual chlorine in drinking water?

Select one of the following:

0.3-0.4 mg/l
1.0-3.0 mg/l
0.05-0.08 mg/l

Explanation

Question 19 of 50

1

Which physical methods are used for disinfection of drinking water?

Select one or more of the following:

boiling
ultraviolet radiation
infrared radiation

Explanation

Question 20 of 50

1

The residual chlorine in drinking water is:

Select one of the following:

free residual chlorine
combined residual chlorine
free and combined residual chlorine

Explanation

Question 21 of 50

1

The maximum permissible level of chlorides in drinking water is 250 mg/l

Select one of the following:

True
False

Explanation

Question 22 of 50

1

Which elements and compounds have influence on the organoleptic indices of drinking water?

Select one or more of the following:

ammonia and nitrite
chlorides and sulfate
iron
calcium and magnesium
nitrate

Explanation

Question 23 of 50

1

Microbiological indices of drinking water are:

Select one or more of the following:

Coliforms
Enterococcus
Staphylococcus aureus

Explanation

Question 24 of 50

1

Is the coliform permissible in 100 ml of drinking water?

Select one of the following:

True
False

Explanation

Question 25 of 50

1

The concentration of carbon dioxide (CO2) in closed gems is used for:

Select one or more of the following:

assessment of the air quality
efficacy of the ventilation system
index of the thermal comfort

Explanation

Question 26 of 50

1

The concentration of CO2 near to 8-10 vol. % causes death

Select one of the following:

True
False

Explanation

Question 27 of 50

1

The content of nitrogen in the atmospheric air is:

Select one of the following:

about 78 vol.%
about 69 vol.%
about 85 vol.%

Explanation

Question 28 of 50

1

The main sources of air pollution are:

Select one or more of the following:

industries
domestic sources
transport
agriculture

Explanation

Question 29 of 50

1

The natural pollutants of the atmospheric air are:

Select one or more of the following:

volcanic activity
ocean sands
smoke and dust
desert sands

Explanation

Question 30 of 50

1

The types of air pollution limits in Bulgaria are

Select one or more of the following:

daily permissible concentration
season permissible concentration
hour permissible concentration
annual permissible concentration

Explanation

Question 31 of 50

1

Gaseous pollutants are removed from ambient air for analysis by use of:

Select one or more of the following:

absorption
titration of the sample
grab sampling

Explanation

Question 32 of 50

1

Which are the air pollutants?

Select one or more of the following:

oxygen
nitrogen dioxide
dust
carbon monoxide

Explanation

Question 33 of 50

1

Dust is classified as:

Select one or more of the following:

inert
toxic
allergenic
fibrogenic

Explanation

Question 34 of 50

1

Methods for dust analysis are:

Select one or more of the following:

comparison
filtration
impingement

Explanation

Question 35 of 50

1

The microclimate includes the following physical factors:

Select one of the following:

temperature, humidity, air velocity, infrared radiation
temperature, humidity, atmospheric pressure, ultraviolet radiation

Explanation

Question 36 of 50

1

The instrument used for measuring atmospheric pressure is:

Select one or more of the following:

thermometer
barometer
pH-meter

Explanation

Question 37 of 50

1

”Wind rose" is:

Select one of the following:

a flower-like diagram indicating the relative frequencies of different wind direction for given station and period of time
a dynamic complex of meteorological factors in respect to given place for short period of time

Explanation

Question 38 of 50

1

Absolute humidity is the weight of water vapor in a unit volume of air. It is expressed in g/m3 or Pa

Select one of the following:

True
False

Explanation

Question 39 of 50

1

Barometric pressure varies with:

Select one or more of the following:

temperature
air pollutants
weather

Explanation

Question 40 of 50

1

The basic methods for measuring the humidity are.

Select one or more of the following:

hydrometry (direct method)
psychrometry (indirect method)

Explanation

Question 41 of 50

1

Kata thermometer is:

Select one or more of the following:

a mercury thermometer
an alcohol thermometer
a glob thermometer

Explanation

Question 42 of 50

1

Infrared radiation occupies the region in the electromagnetic spectrum between microwaves and visible light

Select one of the following:

True
False

Explanation

Question 43 of 50

1

The scale of Bedford for determination of subjective thermal sensation is:

Select one of the following:

7 bale - very hot, hot, warm. comfort, less cool, cool, cold
5 bale - hot, warm, comfort, cool, cold

Explanation

Question 44 of 50

1

Which is the hygienic norm of the air temperature in an living rooms?

Select one of the following:

20 - 22°C
15 - 16°C
28 - 30°C

Explanation

Question 45 of 50

1

Which is the hygienic norm of the air velocity in the living rooms?

Select one of the following:

0.5 - 1 m/s
1 - 2 m/s
0.2 - 0.4 m/s

Explanation

Question 46 of 50

1

Which is the hygienic norm of humidity in the living rooms?

Select one of the following:

10 - 20%
40 - 60%
80 - 100%

Explanation

Question 47 of 50

1

For efficient vision, the following light factors are essential:

Select one of the following:

sufficiency, distribution, absence of glare, absence of slurp shadows, steadiness, color of light
sufficiency, distribution, the wind, color of light, temperature

Explanation

Question 48 of 50

1

Types of ventilation are

Select one or more of the following:

natural ventilation
mechanical ventilation

Explanation

Question 49 of 50

1

Artificial ventilation may be of the following types:

Select one or more of the following:

exhaust ventilation
plenum ventilation
the wind
balanced ventilation
air conditioning

Explanation

Question 50 of 50

1

The air velocity, the wind direction, the air temperature and the humidity are meteorological factors, which determine the microclimate in appointed area.

Select one of the following:

True
False

Explanation