Hygiene MCQs Topic 3

The air temperature in the rooms is measured at the level of (m): A - 1.5; 0.8 and 0.2; B - 1.7 and 0.4; C - 3.2 and 0.5; D - 0.5 m and 1.5; E - 1.5; 0.5 and 0.2.

A - 1.5; 0.8 and 0.2

The dew-point is the temperature: A - at which the absolute humidity becomes maximum; B - at which absolute humidity is not determined; C - at which the absolute humidity is half the maximum; D - at which the relative humidity approaches 80%; E - of the environment at 36.6°C.

A - at which the absolute humidity becomes maximum

The recording of daily range of atmospheric pressure is carried out with the help of: A - barograph; B - barometer; C - thermograph; D - thermometer; E - hygrograph.

A - barograph

To calculate the velocity of the air movement during catathermometric measurements, one needs such data: A - catathermometer factor; B - atmospheric pressure; C - relative humidity; D - average humidity; E - the radiant energy.

A - catathermometer factor

Describe the type of microclimate if: air temperature is - 10° С, relative humidity - 92%, air velocity - 5,0 m/s A - cooling; B - heating; C - annoying D - optimal E - superheating

A - cooling

To calculate the velocity of the air movement during catathermometric measurements, one needs such data: A - cooling time of the catathermometer; B - atmospheric pressure; C - relative humidity; D - average humidity; E - the radiant energy.

A - cooling time of the catathermometer

Describe the type of microclimate if: air temperature is + 30° C relative humidity - 98%, air velocity - 0.01 m/s: A - heating; B - cooling; C - stimulating; D - superheating; E - optimal.

A - heating

Air temperature measuring device is: A - near-wall thermometer; B - barograph; C - hygrometer; D - medical thermometer; E - catathermometer.

A - near-wall thermometer

The horizontal air temperature difference should be (° C): A - no more than 3; B - no more than 2,0; C - no less than 3; D - no less than 2; E - there should be no temperature difference.

A - no more than 3

Catathermometry allows to determine: A - the air velocity; B - the humidity of air; C - the air temperature; D - the atmospheric pressure; E - the radiant emission.

A - the air velocity

Anemometry is used to determine: A - the air velocity more than 1 m/s; B - the air velocity less than 1 m/s; C - relative humidity; D - the average air temperature; E - absolute humidity.

A - the air velocity more than 1 m/s

Psychrometry is used for: A - the determination of the absolute air humidity; B - the studies of the atmospheric air pressure; C - the records of the dynamics of air humidity; D - the studies of the air velocity; E - determination of the intensity of infrared radiation.

A - the determination of the absolute air humidity

The principle of the psychrometer is based on: A - determination of the amount of aeroions in the air with the help of an ionator; B - the water evaporation capacity and the resulting temperature difference between the dry and wet thermometers; C - measurement of the difference in barometric pressure in the morning and evening time; D - measurement of the air temperature in 3 points of the room and calculation of the average quantity; E - determination of the cooling time of the catathermometer from 38° C to 35° C.

B - the water evaporation capacity and the resulting temperature difference between the dry and wet thermometers

To measure and record the air temperature readings in the dynamics, you need: A - thermometer; B - thermograph; С - psychrometer; D - catathermograph; E - barograph.

B - thermograph

To measure the humidity of the air, the catheter was moistened with distilled water, a fan was started, suspended at a level of 1.5 m from the floor in the center of the room and after 10 minutes, the dry and wet thermometer readings were taken. What mistakes are made in the research? A - incorrectly selected level from the floor; B - the research time is violated; C - a psychrometer is needed for the measurement; D - moisturization with distilled water is incorrect, an isotonic solution of NaCl is needed; E - measurements are made without fan.

C - a psychrometer is needed for the measurement

The degree of saturation of the air with water vapor depends on: A - quantities ​​of atmospheric pressure and air temperature; B - air temperature and its velocity; C - absolute humidity and air temperature; D - the relative humidity and air temperature; E - the value of atmospheric pressure and air velocity.

C - absolute humidity and air temperature

To determine the air velocity it is used: A - actinometer; B - psychrometer; C - catathermometer; D - barometer; E - a thermometer.

C - catathermometer

Describe the type of microclimate if: air temperature is - 4° C, relative humidity - 88%, air velocity - 15 m/s: A - comfortable; B - heating; C - cooling; D - stimulating; E - fortifying.

C - cooling

Describe the type of microclimate if: air temperature is + 52° С, relative humidity - 70%, air velocity - 0,2 m/s: A - comfortable; B - cooling; C - heating; D - fortifying; E - annoying.

C - heating

The psychrometer of August is used to determine: A - the content of CO 2 in the air; B - the air velocity; C - humidity of the air; D - barometric pressure; E - changes in the air temperature during the day.

C - humidity of the air

To determine the relative humidity, you need: A - thermometer; B - thermograph; C - hygrometer; D - barometer; E - catathermometer.

C - hygrometer

To study the air velocity, the heated ball catathermometer was placed at a level of 1.5 m from the floor and after 5 min. of cooling the readings were taken. What mistakes were made in the research? A - the instrument for the research has been chosen incorrectly; B - the measurement time is not observed, 10 min is required; C - it is necessary to determine the cooling time of the device from 37° C to 36° C in seconds, and not after 5 minutes; D - the cooling factor is not measured; E - it is required a cooled catathermometer, and not heated for the research.

C - it is necessary to determine the cooling time of the device from 37° C to 36° C in seconds, and not after 5 minutes;

To fully characterize the room temperature conditions, measuring of the temperature is carried out in: A - three points; B - no less than three points; C - no less than nine points; D - no more than six points; E - no more than ten points.

C - no less than nine points

To determine the absolute humidity, you need: A - barometer; B - thermometer; C - psychrometer; D - catathermometer; E - anemometer.

C - psychrometer

Physiological saturation deficiency is: A - the difference between the maximum and absolute humidity of the air; B - the difference between the maximum and relative humidity of air at a body temperature of 36.5 ° C; C - the difference between the maximum air humidity at a body temperature of 36.5° C and absolute humidity; D - the difference between absolute and maximum air humidity; E - the sum of the absolute and maximum humidity at air temperature + 36.5° C.

C - the difference between the maximum air humidity at a body temperature of 36.5° C and absolute humidity

The psychrometer of Assman is used to determine: A - the mobility of air; B - the air velocity; C - the humidity of air; D - barometric pressure; E - changes in air temperature during the day.

C - the humidity of air

The recording of daily range temperature is carried out with the help of; A - barograph; B - barometer; C - thermograph; D - thermometer; E - hygrograph.

C - thermograph

Indications of alcohol thermometers are taken after the exposure of (min.): A - 8; B - 5; C - 3; D - 10; E - 1.

D - 10

Hygienic standard of the air temperature in a residential building is (° C): A - 16 -18; B - 16; C - 18 - 20; D - 20 - 22; E - 22 - 24.

D - 20 - 22

Relative humidity in the residential building during the cold period of the year is considered optimal if it is (%): A - 20-30; B - 30-50; C - 40-65; D - 30-45; E - 50-60.

D - 30-45

Hygienic standard of the relative humidity in the rooms (%): A - 20-28; B - 20-40; C - 30-90; D - 30-60; E - 60-80.

D - 30-60

Apparatus for measuring the atmospheric pressure: A - catathermometer; B - psychrometer; C - anemometer; D - barometer; E - actinometer.

D - barometer

To measure the atmospheric pressure, one uses: A - a luxmeter; B - thermometer; C - catathermometer; D - barometer; E - biodosimeter.

D - barometer

To determine the air velocity in the room you need: A - cup anemometer; B - wing anemometer; С - psychograph; D - catathermometer; E - thermometer.

D - catathermometer

Describe the type of microclimate, if: air temperature is - 8° C, relative humidity - 80%, air velocity - 10 m/s. A - comfortable; B - heating; C - fortifying; D - cooling; E - stimulating.

D - cooling

To calculate the velocity of the air movement using the catathermometry method, it is necessary to know: A - amendment of the catathermometer; B - the air pressure; C - the humidity of the air; D - cooling time of the catathermometer; E - velocity of the air movement (average).

D - cooling time of the catathermometer

Absolute air humidity is: A - the difference between relative and maximum humidity; B - the ratio of the maximum humidity to the relative one in %; C - the sum of the relative and maximum humidity; D - elasticity of water vapor at the time of research in mm Hg E - the largest weight of water vapor, saturated in the air.

D - elasticity of water vapor at the time of research in mm Hg

Describe the type of microclimate if: air temperature is + 45° С, relative humidity - 78%, air velocity - 0,15 m/s: A - comfortable; B - optimal; C - annoying; D - heating; E - intermittent.

D - heating

Describe the type of microclimate if: air temperature is + 20° С, relative humidity - 45%, air velocity - 0,15 m/s: A - intermittent; B - heating; C - cooling; D - optimal; E - annoying.

D - optimal

Describe the type of microclimate, if: air temperature is + 19° С, relative humidity - 42%, air velocity - 0.12 m/s A - heating; B - fortifying; C - cooling; D - optimal; E - annoying.

D - optimal

Type of air humidity, which is normalized, is: A - the maximum; B - the minimum; C - absolute; D - relative; E - intermittent.

D - relative

The environmental factor that affects the thermoexchange of the body and is its determining factor is: A - the relative humidity of the air; B - the absolute humidity of the air; C - maximum humidity of the air; D - the air temperature; E - the barometric pressure.

D - the air temperature

Absolute air humidity is: A - the difference between relative and maximum humidity; B - the ratio of the maximum humidity to the relative one in %; C - the sum of the relative and maximum humidity; D - the amount of water vapor saturating 1 m³ of the air at a given temperature; E - the largest weight of water vapor, saturating 1 m³ of air at a given temperature.

D - the amount of water vapor saturating 1 m³ of the air at a given temperature

Radiation temperature is measured by: A - the near-wall thermometer; B - the manometer; C - the barometer; D - the ball thermometer; E - the psychrometer of the August.

D - the ball thermometer

To measure the air temperature in the room, a mercury thermometer was placed in the center at a level of 2.5 m from the floor and after 5 minutes the readings were taken. What are the mistakes of the thermometry technique? A - the device is incorrectly selected: a catathermometer is needed; B - the study should be performed not at the center of the room, but at the window; C - the measurement recording time was not observed; D - the measurement level is incorrect: it is necessary at a level of 1.5 m from the floor; E - research should be carried out not at the center, but at the door.

D - the measurement level is incorrect: it is necessary at a level of 1.5 m from the floor

Relative air humidity in the residential building during the warm period of the year is considered optimal if it is (%): A - 20-30; B - 30-50; C - 40-65; D - 30-45; E - 30-60.

E - 30-60

Describe the type of microclimate, if: air temperature is + 4° С, relative humidity - 78%, air velocity - 25 m/s A - the optimal; B - superheating; C - stimulating; D - heating; E - cooling.

E - cooling.

The psychrometer has: A - two dry thermometers; B - alcohol and mercury thermometers; C - thermometer and barometer; D - thermometer and actinometer; E - dry and wet thermometers.

E - dry and wet thermometers.

Describe the type of microclimate, if: air temperature is + 40° С, relative humidity - 80%, air velocity - 0,1 m/s: A - comfortable; B - optimal; C - fortifying; D - stimulating; E - heating.

E - heating.

The recording of daily range of humidity is carried out with the help of: A - barograph; B - barometer; C - thermograph; D - thermometer; E - hygrograph.

E - hygrograph.

To calculate the relative humidity, you need to know: A - absolute humidity and air temperature; B - the maximum humidity and speed of air movement; C - maximum humidity and atmospheric pressure; D - minimum humidity and air speed; E - the absolute and maximum humidity.

E - the absolute and maximum humidity.

The intensity levels of infrared radiation are measured by: A - the anemometer; B - the thermometer; C - the psychrometer of the August; D - the psychrometer of the Assman; E - the actinometer.

E - the actinometer.

To calculate the velocity of the air movement during catathermometric measurements, it is necessary to know: A - amendment of the catathermometer; B - humidity; C - the partial pressure; D - the atmospheric pressure; E - the air temperature.

E - the air temperature.

In the hygienic survey of the training laboratory, the light coefficient, floor area, room cubage, air velocity at the air inlet and its area, the air temperature were measured. What parameters are needed to calculate the frequency of the air exchange? A - light coefficient, room cubage and air temperature; B - the necessary studies had not been carried out; C - the area of ​​the room and the light coefficient; D - temperature of air and its velocity at the air inlet; E - the cubage of the room, the air velocity at the air inlet and its area.

E - the cubage of the room, the air velocity at the air inlet and its area.

Relative air humidity is: A - the difference between absolute and maximum humidity; B - the ratio of the maximum humidity to absolute in %; C - the sum of the absolute and maximum humidity; D - the product of absolute humidity by the maximum one; E - the ratio of absolute humidity to maximum one in %.

E - the ratio of absolute humidity to maximum one in %.

To determine the relative humidity in the room, the following is used: A - electrothermometer; B - aspirator; C - psychrometer; D - barometer; E - medical thermometer.

С - psychrometer

Hygienic standard for the air velocity in the room (m/s): A - 0.05 - 0.1; B - 0.1 - 0.2; C - 0.1-0.5; D - 0.2 - 0.3; E - 0.5-1.

B - 0.1 - 0.2

Describe the type of microclimate, if: air temperature is + 3° С, relative humidity - 40%, air velocity - 0,1 m/s A - heating; B - cooling; C - optimal; D - stimulating; E - fortifying.

B - cooling

Describe the type of microclimate under the given conditions: air temperature is + 37 ° С, relative humidity - 88%, air velocity - 0,05 m/s: A - comfortable; B - heating; C - cooling; D - intermittent; E - annoying.

B - heating

The vertical air temperature difference should be (° C): A - no more than 3; B - no more than 2,0; C - no less than 3; D - no less than 2; E - there should be no temperature difference.

B - no more than 2,0