L2 All variants Flashcards
- The water transmission path is possible for transmission:
a) tularemia;
- Characteristic features of water epidemics are:
b) chronic course;
- Prolonged water taking with a high fluoride content leads to the development of:
a) fluorosis;
- Flocculants are used:
b) for water disinfection;
- What diseases belong to the group of endemic diseases?
a) molybdenum gout;
- For what purposes does coagulation apply?
for clarification and discoloration of water.
- Piestic (intermediate) waters, in contrast to surface waters, are characterized by:
b) high turbidity;
- Chlorination of water with preammonization is used for water containing:
a) phenols;
- The most unreliable waters in the sanitary-epidemiological relation are:
a) surface water;
- Excessive silicon content in water can be a risk factor for development of:
a) endemic urolithiasis;
- Indicate which of the listed indicators is not an indicator of water organoleptic properties:
c) hardness.
- For disinfection of individual water resources, the follow-ing are used:
b) tableted preparations (pantocide, aqua-segment);
- The term “contact tail” means:
a) isolated cases of infection in the home after antiepidemic measures in the center;
- Development of water-nitrate methaemoglobinemia is due to:
c) the presence of nitrates in water.
- In decentralized water supply we don’t use:
a) tubular wells;
- Physical methods of water disinfection include:
b) ultrasound effect;
- In chlorinating with usual doses of chlorine, the residual chlorine should not exceed:
a) 0.3-0.5 mg/l;
- The reason for the endemic goiter development is:
c) iodine lack in water.
- For domestic and drinking water supply we don’t use:
c) surface water.
- The oligodynamic method of water disinfection is:
c) disinfection methods of individual water supplies.
- The risk factor for the fluorosis development is the exces-sive content in water of:
a) fluorides;
- Chemical (reagent) methods of water disinfection include:
a) boiling;
- Special methods for improving water quality include:
b) filtration;
- The chlorides content in drinking water should not
exceed:
a) 350 mg/l;
- The disadvantage of surface water supply sources is:
c) possibility of microbial contamination of water.
- Which of the following diseases can be transmitted by
water?
c) typhus.
- Mineralization of drinking water should be:
a) 5-100 mg/l;
- Oligodynamic method of water disinfection (salts of silver, copper) is:
c) is used to disinfect individual water supplies.
- Optimal indicator of total water hardness is:
a) 7 mEq/l;
- Special methods for improving the water quality include:
a) chlorination;
- Organoleptic indicators of water include:
a) sulfates content in water;
- Removal of radioactive contaminants in water is carried out with the help of:
b) decontamination;
- The difference between a centralized water supply
system and a non-centralized system is:
c) the absence of a pipeline system.
- The risk of gout develops when there is the excessive con-tent in water of:
c) selenium.
- The disadvantage of slow filters is:
a) low productivity;
- Chlorination of water with preammonization is applied:
a) in the presence of phenols;
- Prolonged use of water with a low fluoride content leads to the development of:
c) tooth decay.
- Intermediate waters:
a) lie deep (more than 100 m) between two watertight layers
- The sulphates content in drinking water should not
exceed:
a) 350 mg/l;
- The following sources are not required pre-treatment and disinfection of water:
c) all underground sources.
- For water with a pronounced smell, it is necessary to use the method of:
c) filtration.
- With an iodine lack in water, there is a risk of develop-ment of:
a) endemic goiter;
- Reagentless method of water disinfection is:
a) sonication;
- Optimal fluorine concentration in water is:
b) 0.7 mg/l;
- What kind of water is not used for organization of auton-omous household and drinking water supply?
c) intermediate pressure.
- For disinfection of individual drinking water supplies, the following are used
a) tableted forms “AquaSept”, “Pantocide”;
- Special methods for improving the quality of drinking wa-ter include:
a) chlorination with usual doses of chlorine;
- Methemoglobinemia develops with the water taking with a high content in it of:
b) nitrates;
- Flocculants are used for:
b) water disinfection;
- The most reliable water in the sanitary-epidemiological respect are:
b) ground waters;
- The oligodynamic method of water disinfection is:
b) special method for improving the quality of drinking water;
- The characteristic features of water epidemics are:
a) chronic course;
- Strontium rickets develops:
a) with a lack of strontium in water;
- Water coagulation is used for:
b) clarification of water;
- Requirement for slow filters is:
a) maturation of the active biological film;
- The excess silicon content in water contributes to the de-velopment of:
c) endemic urolithiasis.
- In decentralized water supply we use:
a) a distribution network;
- Physical methods of water disinfection include:
a) ultrasound effect;
- For normal chlorination, residual chlorine in water should not exceed:
b) 0.3-0.5 mg/l;
- Which of the following diseases can be transmitted by wa-ter?2
c) typhus.
