Quiz
Hygiene and Ecology Test 1- 3rd Year- Sem 1- PMU
Questions in this quiz (50)
1Hygiene is one of the main objects of the preventive medicine
- ATrue
- BFalse
2What is a hygienic norm?
- Aa law document about the quality indices of environmental factors
- Bthe maximal or minimal physiologically safe levels of environmental factors
3The main branches of hygiene are:
- Achildhood and adolescent hygiene
- Boccupational medicine
- Cepidemiology
- Dhygiene of nutrition
4The specific methods of hygiene are:
- Asanitary description
- Bsanitary investigation
- Cbiochemical method
- Dcomplex hygienic method
5Which are the types of health control?
- Acurrent
- Bpreliminary
- Cpreliminary and current
6The monitoring of drinking water is
- Aperiodical
- Bpermanent
- Cperiodical and permanent
7The permanent manicuring of drinking water includes:
- Aorganoleptic analysis
- Bphysical and chemical indices
- Cepidemiological indices
- Dmicrobiological indices
8The hardness of water depends on the content of:
- Acalcium and magnesium
- Biron and manganese
9The hardness of water is expressed by mini-equivalent per liter (meqV/l)
- ATrue
- BFalse
10The organoleptic indices of drinking water are:
- Acolor, taste, hardness, colony counts
- Bcolor, taste, odor, turbidity
- Ccolor, taste, odor, hardness
11Indicate the laboratory analysis for the drinking water quality according to Instruction No. 9 / 2001 year:
- Aorganoleptic indices
- Bmicrobiological indices
- Cepidemiological indices
- Dphysical and chemical indices
- Eradiological indices
12Water odor should be no more than 2 bales at temperature of 20°C
- ATrue
- BFalse
13Which is the hygienic norm for the nitrate content in drinking water?
- A50 mg/l
- B100 mg/l
- C0.5 mg/l
14Nitrites are indicators for recent organic pollution of water
- ATrue
- BFalse
15Which elements and compounds have influence on the organoleptic indices of drinking water?
- Aammonia and nitrite
- Bchlorides and sulfate
- Ciron
- Dcalcium and magnesium
- Enitrate
16What is oxidation?
- AThis is the oxygen in 1 liter water
- BThis is the oxygen, necessary for the oxidation of organic substances in 1 liter water
- CThis is the organic matter in 1 liter water
17The water pH determination may be measured with:
- ApH-meter
- BpH-indicator paper
- CMerck-colorimetric pH test
18Which is the hygienic norm of the residual chlorine in drinking water?
- A0.3-0.4 mg/l
- B1.0-3.0 mg/l
- C0.05-0.08 mg/l
19Which physical methods are used for disinfection of drinking water?
- Aboiling
- Bultraviolet radiation
- Cinfrared radiation
20The residual chlorine in drinking water is:
- Afree residual chlorine
- Bcombined residual chlorine
- Cfree and combined residual chlorine
21The maximum permissible level of chlorides in drinking water is 250 mg/l
- ATrue
- BFalse
22Which elements and compounds have influence on the organoleptic indices of drinking water?
- Aammonia and nitrite
- Bchlorides and sulfate
- Ciron
- Dcalcium and magnesium
- Enitrate
23Microbiological indices of drinking water are:
- AColiforms
- BEnterococcus
- CStaphylococcus aureus
24Is the coliform permissible in 100 ml of drinking water?
- ATrue
- BFalse
25The concentration of carbon dioxide (CO2) in closed gems is used for:
- Aassessment of the air quality
- Befficacy of the ventilation system
- Cindex of the thermal comfort
26The concentration of CO2 near to 8-10 vol. % causes death
- ATrue
- BFalse
27The content of nitrogen in the atmospheric air is:
- Aabout 78 vol.%
- Babout 69 vol.%
- Cabout 85 vol.%
28The main sources of air pollution are:
- Aindustries
- Bdomestic sources
- Ctransport
- Dagriculture
29The natural pollutants of the atmospheric air are:
- Avolcanic activity
- Bocean sands
- Csmoke and dust
- Ddesert sands
30The types of air pollution limits in Bulgaria are
- Adaily permissible concentration
- Bseason permissible concentration
- Chour permissible concentration
- Dannual permissible concentration
31Gaseous pollutants are removed from ambient air for analysis by use of:
- Aabsorption
- Btitration of the sample
- Cgrab sampling
32Which are the air pollutants?
- Aoxygen
- Bnitrogen dioxide
- Cdust
- Dcarbon monoxide
33Dust is classified as:
- Ainert
- Btoxic
- Callergenic
- Dfibrogenic
34Methods for dust analysis are:
- Acomparison
- Bfiltration
- Cimpingement
35The microclimate includes the following physical factors:
- Atemperature, humidity, air velocity, infrared radiation
- Btemperature, humidity, atmospheric pressure, ultraviolet radiation
36The instrument used for measuring atmospheric pressure is:
- Athermometer
- Bbarometer
- CpH-meter
37”Wind rose" is:
- Aa flower-like diagram indicating the relative frequencies of different wind direction for given station and period of time
- Ba dynamic complex of meteorological factors in respect to given place for short period of time
38Absolute humidity is the weight of water vapor in a unit volume of air. It is expressed in g/m3 or Pa
- ATrue
- BFalse
39Barometric pressure varies with:
- Atemperature
- Bair pollutants
- Cweather
40The basic methods for measuring the humidity are.
- Ahydrometry (direct method)
- Bpsychrometry (indirect method)
41Kata thermometer is:
- Aa mercury thermometer
- Ban alcohol thermometer
- Ca glob thermometer
42Infrared radiation occupies the region in the electromagnetic spectrum between microwaves and visible light
- ATrue
- BFalse
43The scale of Bedford for determination of subjective thermal sensation is:
- A7 bale - very hot, hot, warm. comfort, less cool, cool, cold
- B5 bale - hot, warm, comfort, cool, cold
44Which is the hygienic norm of the air temperature in an living rooms?
- A20 - 22°C
- B15 - 16°C
- C28 - 30°C
45Which is the hygienic norm of the air velocity in the living rooms?
- A0.5 - 1 m/s
- B1 - 2 m/s
- C0.2 - 0.4 m/s
46Which is the hygienic norm of humidity in the living rooms?
- A10 - 20%
- B40 - 60%
- C80 - 100%
47For efficient vision, the following light factors are essential:
- Asufficiency, distribution, absence of glare, absence of slurp shadows, steadiness, color of light
- Bsufficiency, distribution, the wind, color of light, temperature
48Types of ventilation are
- Anatural ventilation
- Bmechanical ventilation
49Artificial ventilation may be of the following types:
- Aexhaust ventilation
- Bplenum ventilation
- Cthe wind
- Dbalanced ventilation
- Eair conditioning
50The air velocity, the wind direction, the air temperature and the humidity are meteorological factors, which determine the microclimate in appointed area.
- ATrue
- BFalse
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- Hygiene and Ecology Test 1- 3rd Year- Sem 1- PMU
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- Med Student
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- English
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