ECONOMICS,NURSING,BIOLOGY AND ALL REVISION MATERIALS

HVAC AC Excellence Exam Questions and Answers While trouble shooting a residential split system, the service technician finds low operating pressures and low system amperage draw, this could be an indication of? - ANSWERS -Low airflow across the evaporator Air or other non condensable gases in a capillary tube air conditioning system will cause these symptoms? - ANSWERS -High suction pressure and high discharge pressure A refrigerant over change in a capillary tube air conditioning sy...

HVAC MIDTERM EXAM QUESTIONS AND ANSWERS The outdoor coil on a heat pump is defrosted using: A: Hot gas B: Electric heaters C: Off cycle defrost D: Straight time defrost - ANSWERS -A: Hot gas A heat pump defrosts even when there is no ice on the outside coil. Which of the following is most likely the problem? A: The defrost time clock is set for too short a cycle B: The outdoor coil is dirty and the system uses a pressure differential type of defrost initiation ...

HVAC Star Exam Questions and Answers Which of the following would happen if the vent port on a gas regulator is plugged? - ANSWERS -outlet pressure will be reduced Two types of thermal overload relays in common use today are - ANSWERS -the bimetal relay and the melting alloy relay. Defrost systems can be terminated by - ANSWERS -time, pressure, and temperature Suction gas temperature minus saturated suction temperature equals - ANSWERS -superheat A vacuum breaker is installed be...

HVAC Exam Review Questions and Answers An AIRTROL fitting is used for what purpose? - ANSWERS -directing air flow to the expansion tank In a hot water heating system, the correct amount of water in the system will be maintained by? - ANSWERS --Flow control valves •A pressure reducing valve that keeps the system filled with water and maintains a minimum set pressure in the system. Identify a device shown in the figure - ANSWERS -Learn the figures The water level in the closed exp...

HVAC Technical Exam H3-1 Questions and Answers Threaded fittings in sizes larger than _____ inches shall not be used except where approved. - ANSWERS -4 inches (Fuel Chp 4) Each appliance shall be provided with a shutoff valve within _____ from the appliance. - ANSWERS -6 feet (Fuel Chp 4) Your installation requires a clearance to combustible materials for a single-wall metal pipe vent connector of 12 inches along the side wall. However, you only have 6 inches, what is the least expen...

HVAC Final Exam Questions and Answers What are the types of centrifugal fans? - ANSWERS -Forward Backward Airfoil Radial What are the types of Axial Fans? - ANSWERS -Propeller Tubeaxial Vaneaxial What are the three types of hydronic systems? - ANSWERS -Hot Water Chilled Water Steam What is an HVAC System? - ANSWERS -all the items needed to maintain thermal comfort within a space or group of spaces What are the four components of an HVAC system? - ANSWERS -Fans Pumps Com...

HVAC Certification Practice Test Questions and Answers

West Virginia HVAC Technician Exam Questions and Answers Is permitted as prescribed by the design professional. - ANSWERS -Boring a hole in a steel roof or floor decking for the installation of mechanical components: Low-pressure gauge - ANSWERS -Which of the following is not one of the main types of pressure gauges used in HVAC service work? Server oil contamination, system likely to fail. - ANSWERS -The megohmeter reading of the winding insulation of a hermetic compressor indicated ...

Hvac skills USA study guide exam questions and answers High temp refrigeration is produced by an - ANSWERS -Air conditioning system Primary air adjusts on atmospheric type gas burners are usually - ANSWERS -Butterfly shutters The maximum tamp at which soft soldering is done at is - ANSWERS -800F If a conductor carrying electrical current is formed into a coil, the magnetic feild around the wire will - ANSWERS -Increase If a thermostat expansion valevdz thermal bulb came loose fr...

HVAC CONTRACTOR EXAM QUESTIONS AND ANSWERS A truck service is delivering custom designed equipment to your job site and is involved in an accident. Which insurance policy most covers your loss in equipment? a. Automobile insurance b. Theft insurance c. Motor truck cargo insurance d. Named peril builders' risk insurance - ANSWERS -Motor truck cargo insurance In a sole proprietorship, business taxes are assessed against which of the following? a. Shareholders b. Business ent...

Hvac Employment readiness Exam Questions and Answers The generally excepted evaporator airflow in residential air-conditioning is? - ANSWERS -350 through 450 CFM. The recommended residential indoor relative humidity level for summer is what? - ANSWERS -50% at 75 degrees An inefficient compressor is usually an indicated by? - ANSWERS -Lower than normal head pressure and higher than normal suction pressure. What are the symptoms of a hermetic system low on refrigerant? - ANSWERS -Low...

HVAC Test Questions with Complete Solutions

HVAC EPA 608 Certification Study Guide Exam Questions and Answers At what point in the system should you charge a low pressure system and what should you start the charge with? - ANSWERS -Charge through the evaporator charging valve as this is the lowest point on a low pressure system. First charge the system with vapor until the refrigeration saturation temperature reaches 36 degrees F or the vapor pressure reaches 16.9" Hg vacuum What are the levels of evacuation for low pressure sy...

HVAC TEST QUESTIONS & ANSWERS The fresh air requirement for residential and apartments range from - ANSWERS -10 - 20 cfm The ventilation requirements for a given structure or space are based on which of the following - ANSWERS -desired number of air changes, number of occupants While calculating the cooling load estimate for a house, each person is given an allowance of - ANSWERS -200 btu Humidification is the removal of moisture to the air - ANSWERS -false Large commercial cool...

HVAC test questions and answers Quick connect type - ANSWERS -The service valves on R134a systems are the: Lack of lubrication - ANSWERS -The most common cause of A/C compressor failure is: Technician A only - ANSWERS -A truck driver is complaining of heat coming through the outlets in warm weather when the vehicle is in motion. Technician A says it is possible that the water shut off valve could be open. Technician B says the coolant could be low. Who is right? Neither A or B - AN...

HVAC Study Guide Exam Questions and Answers What is the main difference between the two-position and timed two-position control? a) The timed two-position maximizes the difference between the operation and control differential b) The timed two-position control makes use of a proportional plus integral control c) The timed two-position minimizes the difference between the operating and control differential d) The timed two-position control does not use an on-off control e) The timed t...

BUNDLE - MCN EXAMS

MCN 273 OB EXAM 1 QUESTIONS AND ANSWERS A newborn was diagnosed with a congenital heart defect and will undergo surgery at a later time. The nurse is teaching the parents about signs and symptoms that need to be reported. The nurse determines that the parents have understood the instructions when they state that they will report which of the following? (Select all that apply.) A) Weight loss B) Pale skin C) Fever D) Absence of edema E) Increased respiratory rate - ANSWERS -B) Pale skin...

MCN Study Exam Questions with Complete Solutions

MCN prelims test questions and answers Collection bag - ANSWERS -Used to collect urine specimen for toddlers and infants not toilet trained Crystalluria - ANSWERS -Super absorbent disposable diapers may produce a false _ Clean catch specimen - ANSWERS -Urine samples obtained for culture after the urethral near us is cleaned, midstream Empty bladder - ANSWERS -24 he collection of urine starts and ends with an _ _ Suprapubic aspiration - ANSWERS -_ _ or bladder catheterization is ...