Tài liệu Thi tuyển Lọc Dầu Nghi Sơn Piping assessment quesion12

Q For a liquid or a gas to flow, there must be a difference in: A) temperature B) pressure C) throttled D) none of these Q Throttling refers to regulating flow: A) direction B) rate C) temperature D) all of these Q When a valve is partially open, it is said to be in then position A) maximum flow B) optimum flow C) throttling D) optimum flow and throttling Answer A (Minimum is correct but follow PVMTC) Q The main function of packing in a gate valve is to: A) protect the bonnet B) hold the bonnet in place C) hold the stem in place D) stop leakage Q This Q is referred to the exhibit number (A, B, C) Gate A is a: A) solid wedge gate B) parallel disc gate C) solid split gate D) circle gate This Q is referred to the exhibit number Q This valve is a A) gate valve B) globe valve C) check valve D) ball valve Q When conditions require that a valve must be quickly opened and closed, which kind of valve should be used? A) Gate valve B) Globe valve C) Plug valve D) Any of these Q.8 This Q is referred to the exhibit number A) gate valve B) globe valve C) swing check valve D) vertical lift check valve Q.9 The main function of a globe valve is to control A) the rate of flow B) the direction of flow C) Both of these D) Neither of these This Q is referred to the exhibit number Q 10 Look at this picture of a valve Point A is the A) body This is a B) stem C) gate D) bonnet This Q is referred to the exhibit number Q 11 Look at this picture of a valve Point B is the: A) body B) stem C) gate D) bonnet This Q is referred to the exhibit number Q 12 To fix this leak, a worker probably has to replace: A) The gasket B) The whole valve C) The packing D) The gate Q 13 Check valves are used A) at high pressure B) in bends C) for controlling water flow D) for unidirectional flow Q 14 The most economical flow control valve for use with large diameter pipes is a A) butterfly valve B) globe valve C) needle valve D) none of these Q.15 Two piping system are said to be equivalent, when the are same A) fluid flow rate & friction loss B) length & friction factor C) diameter & friction factor D) length & diameter Q 16 A pipe is specified by its A) thickness only B) outer diameter only C) thickness & outer diameter both D) inner diameter Q 17 Nominal size of a pipe is an indication of its diameter A) inner B) outer C) approximate D) none of these Q 18 For pipes that must be broken at intervals for maintenance, the connector used should be a/an A) union B) tee C) reducer D) elbow Q 19 The nominal size of a hose pipe is specified by its A) ID B) OD C) thickness D) none of these Q 20 The valve commonly used in pipes larger than 2" diameter is a A) globe valve B) plug-cock C) gate valve D) check valve Q 21 Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its A) inner diameter B) outer diameter C) thickness D) neither inner nor outer diameter Q 22 Which type of equipment is not a kind of piping equipment? A) Pipe B) Flange C) Valve D) Furnace This equipment below is called as : Q 23 A) Tee B) Concentric reducer C) Pipe D) Eccentric Reducer Q 24 Body of gate valve can not be made by : A) Carbon Steel B) Alloy steel C) Copper D) PVC Q 25 The name of valve in picture below is : A) Gate valve B) Globe valve C) Plug valve D) Ball valve Q 26 The valve body can not be connected to the process piping by: A) Flanges B) Threaded connections C) Welding D) Glue Q 27 This type of pipe is commonly used for water, steam, oil, and gas: A) Wrought iron or copper B) PVC or steel C) Steel or wrought iron D) Copper or PVC Q 28 Diaphragm valve is used for following case : A) Fluid with high temperature B) Fluid with high pressure C) Fluid with high capacity D) Fluid with metal- corrosive or sticky Q 29 This type of pipe is commonly used for water or gas service, and also as soil pipe A) PVC B) Copper C) Steel D) Cast-iron Q 30 Lift check valve is used for A) vertical pipe B) horizontal pipe (PVMTC answer) C) pipe system with an angle of 450 with horizontal D) A and B (Correct) Answer B Q 31 The flange in the figure as below is A) Flat face B) Ring- joint face C) Raised face Q 32 Which type of flange in the figure as below? A) Socket-welded flange B) Welding-neck flange C) Blind flange D) Threaded flange Q 33 What is the difference of safety valve and relief valve? A) Principle of operation B) Safety valve is smaller than relief valve C) Safety valve is bigger than relief valve D) Relief valves are used in liquid services and Safety valves are used in gas services Q 34 ID of 1/4" schedule 40 pipe is 0364" ID of a 1/2" schedule 40 pipe would be inch A) 4728 B) 05 C) 0622 (If has this question choose C) D) 0474 Answer C Q 35 This is not the purpose of piping inspection? A) identify active deterioration mechanisms B) specify repair C) replacement D) Weld the piping Q 36 Socket-welded joints are made by inserting the end of the pipe into a recess in a fitting or valve and then the joint A) fillet welding B) glue C) bolting D) connecting Q 37 Factors to consider when classifying piping are: A) Toxicity B) Combustibility C) Volatility D) All of these Q 38 Erosion is the removal of surface material by the action of numerous individual impacts of A) solid B) liquid particles C) cavitation D) All of these Q 39 Ultrasonic testing (UT) is a family of testing techniques based in the propagation of ultrasonic waves in the object or material tested A) non- destructive B) destructive C) All of these Q 40 Which of the following statements is the advantages of Ultrasonic testing (UT) A) Extensive technical knowledge is required for the development of inspection procedures B) Inspected items must be water resistant, when using water based couplants that not contain rust inhibitors C) Surface must be prepared by cleaning and removing loose scale, paint, etc., D) High penetrating power, which allows the detection of flaws deep in the part Radiographic Testing (RT) is a method of inspecting materials for hidden Q 41 flaws by using the ability of short wavelength electromagnetic radiation (high energy photons) to penetrate various materials A) non- destructive B) destructive C) All of these Q 42 Nonmetallic piping systems are often used for fluids that is A) toxic B) flammable C) environmentally benign Q 43 pressure test conducted on piping system can be tested for A) leak B) Strength of piping component C) None of these D) A and B are correct Q 44 When test the speed of leak in the ball valve, the test time depends on : A) Class of valve B) Ball material C) Valve size D) Seat ring material Q 45 The pipe fitting which makes a 180° turn is called a/an… A) eighth bend B) lateral fitting C) return fitting D) elbow Q 46 Which type of gasket is most frequently used in a high-pressure hydraulic system assembled with socket weld flanges? A) spiral flange B) crush ring C) “O” ring D) Split ring Q 47 Before breaking open the pipe joints for repair, what should be done with the isolation valves on a high pressure steam system? A) Remove the valve handles so the valves can't be operated B) Open the valves fully to equalize the pressure with the system C) Check that the valves are closed, tagged and locked out D) Determine the pressure in the mains ahead of the isolation valves Q 48 Which of the following is not a reason for using cutting oil when threading pipe? A) To protect the threads from rust B) To reduce friction C) To remove heat D) To prevent metal chips from adhering to the dies Q 49 Internal Visual Inspection for Piping system include following duties: A) Inspection Corrosion, Erosion, and Fouling B) Inspection cracks C) Inspection Gasket Faces of Flanges D) All of these Q 50 Which type of following Ultrasonic thickness instrument can measure pipe with 0.04 in to 20 in diameter? A) numeric thickness readout B) A-scan with numeric thickness readout C) flaw detectors Q51 What is the ASME code follow the design of piping system in process piping (Refineries and chemical industries) A B31.1 B B31.3 C B31.5 D B31.9 Q52 Normally what we use the following? A Eccentric reducer = Pump suction to avoid cavitation B Concentric reducer = Pump discharge, vertical pipeline Q53 Concentric is used in suction pump? (Yes or No) Explain? Answer No air pockets may from it concentric reducer is used at pump suction, which result in cavitation and cause damaged to pump Q54 What is the ASTM code for the following? i CS pipe = ASTM A106.Gr.B ii CS fittings= ASTM A234Gr.WPB/WPBW iii CS flanges= ASTM A105 Q55 Why we provide high point vent (HPV) and Low point drain (LPD)in piping? Answer HPV – for removing air during hydro test LPD – for drain water after conducting hydro test Q56 What is the normal upstream and downstream straight down length of orifice flow meter? Answer Upstream 15D, downstream 5D Q57 What is the ANSI/ASME dimensional standard for steel flanges and fitting? A B16.3 B B16.5 C B16.9 D B16.10 Q58 What is the distance to be maintained between two welds in a pipe Answer At least 01 D Q 59 External Visual Inspection for Piping system include following duties: A) Inspection Corrosion, Erosion, and Fouling B) Inspection leaking C) Inspection Gasket Faces of Flanges D) All of these Q 60 Which of the following is the type of pipe inspection plan? A) Safety B) Describe any required repairs Q 61 Which of the following is the task of the inspection plan? A) Schedule required to monitor damage mechanisms B) Reliability and Efficient Operation C) Safety Q 62 Which of the following is an aim of pipe inspection plan? A) A leak or failure a piping system B) Efficient Operation C) Finding out and complementing the default Q 63 What should inspector consider following? A) Planning work the collaborative B) Operating pressure ranges Q 64 Which of the following should to develop an inspection plan? A) Identifying and evaluating the process fluid B) Collaborative work of the inspector Q 65 Suiting the fluid working with Nonmetallic Piping? A B C D Nontoxic Nonflammable Environmentally benign All of these Q 66 Kind of the traditional NDE techniques assess the nonmetallic piping? A UT, RT, AE (Acoustic emission), MW (microwave) B Hardness test C Thermalgraphic imaging All of these D Q 67 Purpose of testing? Answer A process conducted on in-service piping may function as a leak test or if the pressure is high enough, it can reveal in gross errors in design or fabrication Q 68 Performing of pressure testing? A During liquid pressure testing, all air should be expel from the piping from vents provides from high points B Care should be taken to ensure the does not overpressure the system, includes components C The pressure for a liquid pressure test is usually supplied by an available pump D All of these