Excell Libros

Which of the following is the correct order of processes within a cognitional surface water treatment plant? a) screens, coagulation, flocculation, filters, chlorination b) screens, flocculation, coagulation, chlorination, filters c) chlorination, screens, filtration, coagulation, flocculation d) screens, filters, flocculation, coagulation, chlorination - - a) screens, coagulation, flocculation, filters, chlorination What does the term 'contact time' mean? a) it is the amount...

A mixture of air and gas is considered hazardous when the mixture exceeds what percentage of the lower explosive limit (LEL)? - - 10% Which of the following duties should NOT be performed by a small system operator? - - Wire pumps, compressors, and electrical components of the water system What are the most important methods of ensuring operator safety? - - Alerting operators of unsafe acts and conducting mandatory safety training What safety procedure should an operator always follo...

It is generally accepted by psychologists that human behavior is goal-oriented and A. selfish B. random C. other-centered D. motivated - - D. motivated Steel tanks may be protected from rusting by A. alternately wetting and drying walls B. maintaining humidity in tank C. protective coatings D. washing tank walls - - C. protective coatings What should be the most important concern of an operator after a bypass? A. aquatic life B. clean-up procedures C. health-related effects D...

Water Treatment Class D (practice exam -2) Questions With 100- Correct Answers, Water Treatment Class D (practice exam -4) Questions With 100- Correct An swers, Water Treatment Class D Study Guide Exam Test Practice Questions & Answers, Water Treatment Class D (practice exam -1) Verified Solution, Water Treatment Class D (practice exam -3) Q&A’s 10

Which of the following is a requirement for viruses under the surface water treatment rule? - ANS - 99.99% removal and/or inactivation. What is the process that transfers water vapor from living plants into the atmosphere? - ANS - Evapotranspiration When must a repeat sample be taken? - ANS - Sample test positive for total coliform. Why is fluoride injected into drinking water? - ANS - reduce tooth decay

Which is the best type of gasket to use when connecting a chlorine cylinder or container to the chlorine feed system? - ANS - Lead gasket Which part of the human body is the most vulnerable to allowing microorganisms to enter it? - ANS - Eyes The organisms used to indicate the likelihood that pathogenic bacteria may be present are - ANS - coliform bacteria Which adverse effects does the secondary contaminant manganese have? - ANS - Discolored laundry and changed taste of water, coff...

If 2.5mg/L of chlorine is dosed, and there is 0.5mg/L of residual, what is the reason for the residual? - ANS - The residual is present as a safeguard for unanticipated chlorine demand in the distribution system Which of the following must always be done before repairing a pump? - ANS - Lock out equipment Which of the following is least likely to affect the effectiveness of chlorine? - ANS - Sodium Which of the following is considered safe to drink? - ANS - no pathogens Which rea...

Which of the following is true regarding water sampling? - ANS - Collecting water samples at a water treatment plant is no different than collecting samples from a stream or river. What has a "rotten egg" smell? - ANS - hydrogen sulfide Which coliform bacteria test involves the use of lauryl tryptose broth? - ANS - Multiple tube fermentation method How alkalinity is usually expressed? - ANS - Calcium carbonate equivalents What does a pH of 2 represent? - ANS - Strong acid ...

What is typical characteristic of colloidal particles in raw water? - ANS - Negative charge on the surface What is short circuiting in a clarifier? - ANS - Shorter settling time in basin. What would cause a filter to begin backwashing? - ANS - head loss What is the purpose of surface washing in a filtration unit? - ANS - Break-up mud balls. Where would you most likely see high levels of nitrate in the groundwater supply? - ANS - Near agricultural land What is adsorption? - AN...

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What are the main differences between first and second generation antihistamines - ANS - Benadryl (1st) crosses BBB - ant muscarinic effects Claritin (2nd) does not cross the BBB due to water solubility and does not have ant muscarinic effects - selective Eicosanoids - ANS - lipids derived from arachidonic acid Prostaglandins, thromboxane’s, and leukotrienes Similar to hormones Where is arachidonic acid located? - ANS - fatty acid tails of the cell membrane What does phospholipa...

What might increase total drug concentration mean? - ANS - increased free drug in the plasma when the protein binding sites are saturated Biotransformation - ANS - One or more biochemical reactions involving a parent drug; occurs mainly in the liver and produces a metabolite that is either inactive or active. Also known as metabolism. What is the relationship between biotransformation reactions in the body and the solubility of the drug? - ANS - makes the drug more water soluble so that...

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Examples of edema caused by decreased capillary oncotic pressure - ANS - -cirrhosis, malnutrition (decreased synthesis of plasma proteins) -nephrotic syndrome (increased loss of plasma proteins) -Increased plasma Na and H2O retention (dilution of plasma proteins) Examples of edema caused by increased capillary permeability - ANS - -burns -inflammation -neoplastic disease -allergic reactions -infection Loss of plasma proteins to interstitial space leading to increased tissue oncotic p...

What are the signs and symptoms associated with hypernatremia - ANS - thirst, fever, dry mucous membrane, hypotension, tachycardia, restlessness, low jugular venous pressure. Why does giving insulin reduce potassium? - ANS - Insulin carries potassium back into the cell What are the signs and symptoms of hyponatremia - ANS - Seizure, headache, neurological changes, confusion. Nausea, muscle cramps What factors influence calcium and phosphate balance? - ANS - Calcium and phosphate bal...

Bundled NSG 625 Advanced Health Assessment Exams With Latest Updated Solutions

What does it mean if moro reflex is present past 6 months of age - - suspect presence of neurological disease What does an asymmetrical moro reflex indicate - - brachial plexus palsy or unilateral fracture of the humerus or clavicle Rooting reflex - - examiner strokes the corner of the infants mouth or cheek while the infant is lying quietly with hands held against the chest infant will turn head to the same side stroked by the examiner and open his/her mouth to grasp the examin...

How to apply diaphragm of stethoscope - - firmly When to use diaphragm of stethoscope - - with high pitched sounds i.e. valve closure, systolic events, and regurgitate murmurs When to use bell of stethoscope - - with low pitched sounds i.e. gallops, murmur, AV stenosis what happens to PMI in COPD - - shifts down and to the right What happens to the PMI during pregnancy? - - shifted upward 1-1.5 cm (about 1 space) heaves/lifts - - sustained forceful thrusting of ventricle d...

Secondary headaches - - occur due to an underlying cause and can be benign or serious. Common causes of secondary headaches include Viral syndrome Medication-induced headache (eg, caffeine, alcohol, analgesics, monosodium glutamate, oral contraceptive pills) Temporomandibular joint (TMJ) dysfunction Sinusitis Cervicogenic headache Serious causes of secondary headaches - - Giant cell arteritis Brain tumors Metastatic cancer Stroke Subarachnoid hemorrhage Arteriovenous malformation ...

What can hypoactive or absent abdominal sounds indicate? - - Postoperative paralytic ileus or peritonitis related paralytic ileus. Paralytic ileus - - Also known as functional ileus, this is a condition that occurs when the muscles of the intestines are temporarily paralyzed, preventing food from passing through Peritonitis - - Inflammation of the peritoneum (membrane lining the abdominal cavity and surrounding the organs within it) What can hyperactive bowel sounds indicate? - - ea...