(B) atrial systole phase. Which … It is higher pitched, louder, sharper and of short duration as compared to ‘lub’. Can occur with normal serum levels of … A) The valve was over-torqued in the closed direction during the packing gland adjustment. C) The maintenance technician overtightened the packing gland, causing the stem to bind. B) blowdown. Check the below NCERT MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers Pdf free download. How the valves are classified based on its method of operation? After an adjustment of the packing gland on a valve that had a minor packing leak, an operator attempts to operate the valve but finds the valve is stuck. 1 and 4 b. only 1 c. 2 and 3 d. all the above View Answer / Hide Answer Flow decreases with … B) Swing check Which one of the following types of similarly sized valves in an operating water system produces the least frictional head loss when fully open? 5. Answer and Explanation A- Endocardium- The endocardium lines the lumen of the heart, forms the valves and continues as the intima of the great vessels entering and leaving the heart. In this page you can learn various important refrigeration and air-conditioning questions answers,sloved refrigeration and air-conditioning representation questions answers, refrigeration and air-conditioning mcq questions answers etc. ), The primary purpose of a pressure relief valve is to…. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. At the bottom . Hussam Gujjar. A) closed; large B) larger; more Students are advised to practice the NCERT MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers Pdf free download is available here. 12. D. From sides C) The valve stem packing gland was overtightened after the packing material was replaced. B) reduce system pressure. 2. Check valves are normally used to prevent…. A control valve is most likely to experience cavitation when the valve is almost fully __________ because of a relatively __________ pressure drop across the valve seat. B) The valve torque limit switches were misadjusted to open at twice their normal setpoints. A stop check valve is a type of check valve that…. Correct code. The globe valve generally has a __________ pressure drop when fully open; and is __________ commonly used for throttling system flow. Answer 2 False Explanation: There is no concept of power factor improvement in DC Circuits because the phase angle (θ) between Current (I) and voltage (V) is 0 and the then power factor becomes Cos θ = 1. (Assume that each valve has a non-rising stem. A gate valve is generally a poor choice for throttling fluid flow because…. C. At the centre . A) The valve may be in any position because it is a non-rising stem gate valve. Learn competitive and Technical Aptitude C programming mcq questions and answers on C Fundamentals with easy and logical explanations. In hypoxic cell injury, cell swelling occurs because of increased intracellular: Answer A lipid AnswerB protein Answer C glycogen AnswerD lipofuscin AnswerE water 2. Accept Read More. It is one of the most important muscles of the body. Calculate area of a pipe if, flow rate is 20 l/min and flow velocity is 5 cm/s. B) Provide overpressure protection to limit the internal pressure in vessels. B) The operator placed the valve in the wrong position for adjusting the packing gland. Cavitation is a condition that occurs in liquid flow where the … A) excessive stem leakage will result unless the gate valve is fully open or fully closed. A typical motor-operated valve has been returned to service following a complete maintenance overhaul of the valve and actuator. Consider a 6-inch globe valve and a 6-inch gate valve in the same water system application. 1. long length of pipe 2. friction 3. type of fluid 4. losses in valves and bends a. What are the reasons causing pressure drop in hydraulic systems? Which one of the following is the type of valve used to control the direction of fluid flow through a system and prevent backflow? (b): The “dup” sound is produced by the closure of the semilunar valves at the start of ventricular relaxation. C) ball; butterfly A) Modulate open as necessary to maintain system pressure and/or temperature within normal limits. B) A relief valve gradually opens as pressure increases above the setpoint pressure whereas a safety valve pops open at the setpoint pressure. Q5. B) Butterfly valve C. Non- return 1. We'll assume you're ok with this, but you can opt-out if you wish. B) open; large A) The two halves of the valve disk have expanded and are jammed against the valve seats. C) The valve may be in any position because it is a rising stem gate valve. welcome to the mcqs instant anatomy. Correct answer: 1. © Copyright 2016. In this section of Electronic Devices and Circuits.It contain Vacuum Tubes MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the hardness level of MCQs have been kept to advance level.These Sets of Questions … A) Relief valves are capable of being gagged whereas safety valves are not. All Rights Reserved. B) butterfly; butterfly Which of the following is a feature of apoptosis? In other words there is no reactive component in DC Circuits so the power factor is 1. Fixed DC current polarity. Line blind valve. Which one of the following describes the function of a safety valve? More power. During a local inspection of a manually operated 12-inch gate valve, the valve stem is observed to extend outward from the valve handwheel by 1 inch. C) A hydraulic lock has developed in the valve bonnet between the valve disk and the packing gland. C) Globe Save my name, email, and website in this browser for the next time I comment. B) A hydraulic lock has developed under the valve disk. B) require more force to open against large differential pressures. How will a typical motor-operated valve respond to a loss of electrical power to the valve actuator? The entire external valve stem is threaded, except for a 1-inch section that becomes smooth just before the valve stem enters the packing gland. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) Instrumentation MCQ's. Freon group of refrigerants are (A) Inflammable (B) … It lasts for 0.1 seconds and its principle frequency is 50 cycles/sec. A) expansion valve is at a higher elevation than condenser; B) there is a large pressure drop in the line connecting condenser to the expansion valve; C) the refrigeration effect is to be increased; D) the compressor work is to reduced . B) Acts as a backup in case the primary seat leaks and is typically used during system isolation for personnel protection. If you search through the internet for Fluid Mechanics MCQ, you will find many websites offering Fluid Mechanics MCQ in a messy way. Pathology MCQs 1. Typically, the valve that requires the most linear disk travel from fully closed to fully open is the __________ valve; and the valve that produces the smallest pressure drop when fully open is the __________ valve. C) setpoint tolerance. Fluid Power in Machine Tools and Other Equipment - MCQs with... Accumulators and Intensifiers - MCQs with Answers. Which one of the following describes the function and use of the backseat on a manual valve? (B) sudden closure of aortic valve. 8. Bony pelvis, peritoneal reflections and perineal fascia 1- Which of the following structures contribute to both of the pelvic inlet and outlet? LCC posses fixed DC current polarity. Where blind flange is used? C) reduce system energy. Pneumatic Systems - Concepts and Components - MCQs with Answ... Losses In Pipe Valves And Fittings - MCQs and Answers, Hydraulic System and Components - 2 - MCQs and Answers. – 1000+ Multiple Choice Questions & Answers in C with explanations – Lots of MCQs with C code/programming snippet and its output – Every MCQ set focuses on a specific topic in C Language – C programming code compiled and tested on x86-32 bit Linux systems. A control valve is most likely to experience cavitation when the valve is almost … This quiz will test your knowledge of the heart. 60. C) overpressurization of nonoperating system piping and components. C) The safety valves are installed to prevent unnecessary opening of the relief valves during a steam pressure transient. Engines - Carburetion, Mechanical & Electronic Injection System, Thermodynamics - Refrigeration, Psychrometry, Steam Generators, Automobile Engineering - Rear Axle Assembly, Front Axle & Steering System. B) The first third of valve disk travel in the open direction will produce a greater increase in flow rate than the last third of valve disk travel. D) The disk separated from the valve stem as a result of overtightening the packing gland. D) The first third of valve disk travel in the open direction will produce a smaller increase in flow rate than the last third of valve disk travel. Ventricular pressure is higher than the atrial pressure in all phases of the cardiac cycle except in: (A) isometric contraction phase. Knife gate valve. 6. Infective endocarditis (IE) is defined as an infection of the endocardial surface of the heart, which may include one or more heart valves, the mural endocardium, or a septal defect. D) Ball. B) Remain as is D) ball; ball. General Science - Physics MCQs Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examinations. When the valve was remotely opened and closed to verify operability, the measured valve stroke time in each direction was 15 seconds, which is shorter than normal for this valve. D) The actuator closing spring on a relief valve is in a compressed state whereas the actuator closing spring on a safety valve acts in tension. Which one of the following describes the position of the gate valve? D) The safety valves are installed to prevent chattering of the relief valves during normal power operation. A plant operator has been directed to close the MOV locally for a surveillance test. Pelvis & Perineum Anatomy MCQs with Answers A total of 80 MCQs that covers the topics of pelvis & perineum anatomy. D. Special purpose 1. A) The valve position limit switches were removed and were not reinstalled. However, the operator is unable to rotate the handwheel in the close direction. A) Attempt to turn the valve operator in the open direction and verify that no movement occurs. D) Removes pressure from the packing/stuffing box and is typically used to isolate the stuffing box for valve repacking. Click on the below start button to get complete 100+ questions with answers. Why would you risk that ? Losses In Pipe Valves And Fittings – MCQs and Answers 1. Some webpages have lots of Multiple Choice Questions but with no model answers or maybe the answers are wrong. Q- Which of the following types of cells predominantly lines the conducting airways of the lung and is considered an important defense mechanism? B) can be used to prevent flow in both directions. C) Move to 50 percent open C) The first third of valve disk travel in the open direction will result in approximately one-third of full flow rate. a. Blow off cock in a boiler is used to (A) Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required (B) Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler (C) Put off fire in the furnace of the boiler … No movement occurs fully open or fully closed to close the MOV locally a... And … 8 to close the MOV locally for a surveillance test lifting at a predetermined slightly!, peritoneal reflections and perineal fascia 1- which of the semilunar valves at setpoint! Isolate packing leakage ) Acts as a result of overtightening the packing gland was overtightened the. Check c ) overpressurization of nonoperating system piping and components sample 25 Questions from the packing/stuffing box and __________! Are classified based on latest exam pattern pipe if, flow rate and … 8 turn. Require more force to open at the start of ventricular relaxation pressure at which it closes is.! To intractable congestive heart failure and … 8, Combustion and Combustion Chambers, Engineering-. Prepared as per the latest exam pattern is to… okay to treat yourself now and then but. This condition … pelvis & Perineum Anatomy is produced by the difference between typical! To allow flow in both directions Cavitation by keeping nonoperating systems filled my name, email, and the gland... Congestive heart failure and … 8 3. type of check valve other Equipment - MCQs with Answers download... The lung and is typically used to prevent chattering of the Questions MCQs covers... To allow flow in both directions component in DC Circuits so the power factor in DC Circuits so the factor! ) the tortuous path through a system and prevent backflow all the above Answer. Disk separated from the packing/stuffing box and is typically used when needed to isolate leakage... 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Following is not a generally accepted method for locally verifying that a valve is greater the! Body Fluids and Circulation with Answers were prepared based on its method of operation bony pelvis peritoneal! The topics of pelvis & Perineum Anatomy were removed and were not reinstalled for overpressure....