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A faulty condenser fan motor on an air conditioning system will cause these symptoms..... - High suction pressure and high discharge pressure When connecting copper to steel the recommended brazing filler alloy is a... - 45 percent silver alloy A partially iced over evaporator can be caused by... - An undercharge Heat added to the refrigerant in vapor state after the evaporation process is called.... - Superheat Why must refrigerant in the suction line be slightly warmer than the saturatio...

What is the movement of heat through space called? - Answer-Radiation A refrigerant release heat when - Answer-It condenses Why is it desirable for refrigerant in the suction line to be slightly superheated? - Answer-To insure liquid refrigerant does not enter the compressor A 30 pound cylinder of reclaimed R-22 refrigerant has been stored over night at 70 degrees F. What should be the approximate pressure in the cylinder? - Answer-121 psig 14.7 psia( pouds per square inch absolute) is - A...

Heat which causes a change in temperature of a substance is called; - sensible heat. Heat which causes a change in state of a material without a change in temperature is called; - latent heat. Heat which is added to a vapor after the change of state occurs is called; - superheat. Heat can travel by; - conduction, convection, radiation. The movement of heat by way of fluid (or air) is called; - convection . The movement of heat by direct contact is called; - conduction . The standard unit ...

On which of the following laws of nature is the air-conditioning system based? - Answer-Heat flow, Heat absorption, Pressure and Boiling Points Which of the following statements is not correct? A. Refrigerant leaves the compressor as a high-pressure, high-temperature liquid. B. Refrigerant leaves the condenser as a low-pressure, high-temperature liquid. C. Refrigerant returns to the compressor as a low-pressure, high-temperature vapor. D. None of these answers are correct. - Answer-D. None...

Heat which can cause a change in temperature of a substance is called; - Sensible Heat Heat added to a substance without a rise in temperature;(example: liquid refrigerant to gas) this process is called? - Latent Heat of Vaporization Heat added to the refrigerant in a vapor state after the evaporation process is called; - Superheat A scroll compressor move refrigerant by means of; - Involute spirals The movement of heat by way of fluid(of air) is called; - Convection The movement of heat t...

A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant charge for the system? A. 6 ounces B. 5 pounds C. 5 pounds 10 ounces D. 6 pounds - D. 6 pounds 15ft - 25ft = 10ft x .6 = 6 ounces 5 pounds + 10 ounces + 6 ounces 5 pounds + 16 ounces = 6 pounds ...

Low airflow over a residential split system air conditioning evaporator can cause A: Liquid flood-back to the compressor B: A decrease in compression ratio C: An increase in suction line superheat D: Oil logging in the evaporator - Answer-A: Liquid flood-back to the compressor Which of the following is the correct sequence of work? A: Attach gauge manifold, recover refrigerant, replace filter core, evacuate the system, recharge the system. B: Recover refrigerant, evacuate the system, rep...

Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above - Answer-d (All of the above: air movement, humidity, temperature) A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling-only system should be within ____% of this calculated value. a. ±10% b. +10% c. +15% d. +30% - Answer-c (+15%) The maximum sensible cooling capacity of a heat pump shou...

sensible heat - Heat that causes change in temperature of a substance latent heat - Heat that is added with out a rise in temperature super heat - Heat added to refrigerant in vapor state after evaporation process is involute spirals - Scroll compressor moves refrigerant by means of convection - movement of heat by way of fluid or air conduction - movement of heat by way of solid BTU - Standard unit for measuring heat Condensor - refrigerant gives up heat in the liquid slugging - refrige...

Heat that causes change in temperature of a substance - Answer-sensible heat Heat that is added with out a rise in temperature - Answer-latent heat Heat added to refrigerant in vapor state after evaporation process is - Answer-super heat Scroll compressor moves refrigerant by means of - Answer-involute spirals movement of heat by way of fluid or air - Answer-convection movement of heat by way of solid - Answer-conduction Standard unit for measuring heat - Answer-BTU refrigerant gives up h...

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When is primary prevention to maintain eye health most important? - Answer-In the womb or prior to pregnancy ask if they have a history of rubella or if they have received their vaccinations Why is it important that a woman receives her rubella vaccination before pregnancy? - Answer-If the woman contracts rubella while pregnant the virus can pass through the placenta and cause congenital diseases such as deafness and blindness What are patient teachings regarding the rubella vaccine? - Answ...

The second heart sound is caused by closure of what two valves? - Answer-Aortic and pulmonic What phase of the cardiac cycle immediately follows closure of the semilunar valves and precedes the opening of the AV valves? - Answer-Isometric relaxation What percentage of ventricular filling normally results from atrial contraction? - Answer-15-20% Peripheral venous pressure is the same as what pressure? - Answer-Right atrial Which hemodynamic measurement most directly reflects left ventricular...

The common carotid divides into its external and internal branches usually at the level of the upper border of the: a) hyoid b) cricoid c) thyroid cartilage d) cricothyroid membrane e) carina - Answer-c) thyroid cartilage The prominence of the larynx is formed by the: a) hyoid bone b) thyroid cartilage c) cricoid cartilage d) thyroid gland e) greater cornu - Answer-b) thyroid cartilage The infraorbital artery is a terminal branch of the: a) maxillary artery b) facial artery c) in...

Cavitation is - The creation or vibration of small gas filled bodies by the ultrasound beam. (Tends to occur only with higher-intensity exposures. The 6 intensities from highest to lowest are - 1.) SPTP 4.) SATP 2.)SPPA 5.) SAPA 3.)SPTA 6.) SATA What tricuspid valve leaflets are noted in PLAX? - Anterior and medial/septal posterior. Formula for calculating EF? - EF% = (sv/edv) x 100% Stroke Volume (SV) formula - EDV - ESV What is stroke volume (SV)? - Amount of blood pumped out of each v...

the pericardium may be TV - On 2D Echo, a cleft MV may be confused with an anatomic subcostal 4 chamber - In which view is the ultrasound beam most perpendicular to the IAS be continuous wave - To determine peak AS velocity the tdx should be LA enlargement and signs of pulmonary hypertension - secondary findings in mitral stenosis LVH - patients with longstanding AS will have left ventricular dimension changes - Patients with AI may have serial echos for abnormal wall motion - A left vent...

Severe PR cause what? - RV Volume overload Diastolic murmur RV failure Pt. with parachute MV? - have single pap muscle Severe MR due to flail MV? - Dilated RV Cardiac Tamponade - Pulses paradoxus( more than 10 mmHg) Tachycardia Dyspnea Fatigue dilated IVC RV diastolic collapse primary benign intracardiac tumor? - Mxyoma where do you measure RA ? - Apical-4 EKG systole? - from onset of QRS to end of the T wave Cardiac Tamponade, hepatic vein flow? - decrease with expiration most co...

The antagonists for morphine, demerol, or fentanyl would be considered? - naloxone (narcan) Which of the following descriptions would best describe cardiac catheterization? - the insertion and passage of a small plastic cath into one of the arteries to the heart The CCL (cardiac catheterization laboratory) staff needs to be certified in which of the following? - ACLS PALS BLS Of the following, which would be considered a relative contradiction for a patient to havea cardiac catheterizati...

hypokalemia and which of the following might be considered contraindications for the pt to have a cardiac cath - anemia hyperkalemia electrolyte imbalance fever other systemic illnesses which might need stabilization in 1929, Dr Forssman performed which of the following - first cardiac cath (using a urinary cath inserted into his arm) the 4 major components of conscious sedation protocol should include all of the following except - cleaning the procedure room what are the 4 major compo...

The peak velocity of aortic regurgitation indicates the maximum pressure gradient between: the aorta and the LV in systole the aorta and the LV in diastole the LV and the LA in diastole the LV and the LA in diastole - the aorta and the LV in diastole Which type of image resolution improves with proper placement of the focal zone at the area of interest? temporal lateral contrast elevational - Lateral The tissue of the interventricular septum will be best visualized when: the US beam ...