Steam traps are provided in steam carrying pipelines to
(A) Condense steam
(B) Release excess steam pressure by bleeding steam
(C) Remove condensate and inert gases
(D) None of these
Description : A device known as a _______ is used to release condensate from the pipework whilst preventing the steam from escaping from the system. a. Steam traps b. Steam pipes c. Boiler nose d. Release valve
Last Answer : a. Steam traps
Description : The steam ejector is used to (A) Remove condensate from the steam pipelines (B) Create vacuum (C) Superheat the steam (D) None of these
Last Answer : (B) Create vacuum
Description : Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low (A) Hardness (B) Dissolved solids content (C) Suspended solids content (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : The term _________ is traditionally used to describe steam issuing from condensate receiver vents and openended condensate discharge lines from steam traps. a. dry steam b. wet steam c. phase steam d. flash steam
Last Answer : flash steam
Description : In an ammonia plant, the purge off is essential to (A) Maintain inert gas concentration within a limit (B) Remove excess poisonous gases (C) Maintain H2 : N2 ratio at 3 :1 (D) Remove uncondensed ammonia vapour
Last Answer : (C) Maintain H2 : N2 ratio at 3 :1
Description : Disc compensators are provided in large diameter fuel gas carrying pipelines to (A) Keep the pipe in proper orientation (B) Make the pipe joint leak-proof (C) Account for contraction/expansion ... due to temperature changes of the surroundings (D) Account for the pressure variation side the pipeline
Last Answer : (C) Account for contraction/expansion of pipe due to temperature changes of the surroundings
Description : In a gas-liquid shell and tube heat exchanger, the (A) Presence of a non-condensable gas decreases the condensing film coefficient (B) Gases under high pressure are routed through the tube side, because high pressure ... water or steam condensate remain localised to the tubes (D) All 'a', 'b' & 'c'
Last Answer : (D) All 'a', 'b' & 'c'
Description : Which of the following is the most widely used insulating material for steam carrying pipelines? (A) Ceramic fibre blanket (B) Glass wool and 85% magnesia (C) Vermiculite (D) Slag wool
Last Answer : (B) Glass wool and 85% magnesia
Description : Which of the following is the most widely used heat insulating material for pipelines carrying steam? (A) Tar dolomite bricks followed by asbestos (B) Fireclay refractory followed by aluminium sheet (C) Cotton followed by aluminium foil (D) 85% magnesia cement and glass wool
Last Answer : (D) 85% magnesia cement and glass wool
Description : Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is (A) Black (B) Silver grey (C) Green (D) Yellow
Last Answer : ) Silver grey
Description : Water hammer is caused in steam carrying pipelines, because of (A) Partial condensation of steam (B) Vibration of the pipeline (C) High degree of superheat of steam (D) Its exposure to torrential rain
Last Answer : (A) Partial condensation of steam
Description : Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe. (A) Diameter (B) Colour (C) Altitude (D) None of these
Last Answer : (B) Colour
Description : Steam trap is used to (A) Condense the steam flowing in the pipeline (B) Remove water resulting from partial condensation of steam (C) Stop the supply of steam (D) None of these
Last Answer : (B) Remove water resulting from partial condensation of steam
Description : ____________is used to release condensate in pipe work a) steam trap b) valves c) power generators d) none of above
Last Answer : b) valves
Description : Trap is used to remove __________ from steam pipe lines. (A) Steam (B) Condensate (C) Non-condensable (D) None of these
Last Answer : (B) Condensate
Description : Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat ... drop through the exchanger is desired (D) Temperature of the incoming vapor is very high
Last Answer : (B) Supersaturated
Description : Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation ... (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
Last Answer : (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
Description : Surge tanks are provided in high pressure water pipelines to (A) Store a definite quantity of water all the time (B) Reduce the water hammer (C) Facilitate easy dismantling of pipeline for cleaning and maintenance (D) None of these
Last Answer : (B) Reduce the water hammer
Description : An ejector is used to (A) Increase pressure (B) Increase temperature (C) Remove condensate (D) None of these
Last Answer : (D) None of these
Description : The MAIN purpose of burnishing is: A. To help eliminating excess mercury (condensing) B. To condense margins C. Polishing of filling
Last Answer : B. To condense margins
Description : A process stream of dilute aqueous solution flowing at the rate of10 Kg.s -1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s -1 . A 1 ... side (C) Parallel flow with process stream on shell side (D) Parallel flow with process stream on tube side
Last Answer : (A) Counter flow with process stream on shell side
Description : Corrosiveness of steam condensate is due to the presence of (A) CO2 (B) Dissolved O2 (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving ... (C) Kc = Kp . RT = Km . RT/p (D) None of these
Last Answer : (C) Kc = Kp . RT = Km . RT/p
Description : Why does it feel so painful when particles in steam condense on?
Last Answer : Need answer
Description : The vent valve provided in a liquid handling centrifugal pump is (A) Generally a needle valve (B) Used to release any gases that might be vapour locking the pump (C) Helpful in easy removal of samples (D) All (A), (B) and (C)
Description : Increase in temperature due to excess of carbon dioxide in air which traps heat energy is known as _______ . a) global warming b)soot c)ash d)acid rain
Last Answer : a) global warming
Description : A steam and condensate system represents a _____ loop. • Discontinuous • Continuous • None of the above • All of the above
Last Answer : • Continuous
Description : when steam is condensate volume is drastically……. a) reduces b) increase c) both a) & b) d) None of above
Last Answer : a) reduces
Description : Condensate is the liquid formed when steam passes from the ________ to the ______ state. a. Vapor, solid b. Solid, liquid c. Vapor, liquid d. None
Last Answer : c. Vapor, liquid
Description : The _______ system includes anywhere that the steam condenses to form liquid water. a. Loop b. Power c. Liquid d. Condensate
Last Answer : d. Condensate
Description : A __________ is a type of heat exchange system where water is heated to its' boiling point via combustion of a fuel blown through a tube submerged in water. a. Condensate loop b. Hyperbolic cooling tower c. Steam boiler d. All of above
Last Answer : c. Steam boiler
Description : What is the function of the steam traps?
Last Answer : During startup the steam traps will bypass turbine drains.
Description : Traps A. Are water seals which prevent the entry of foul gases B. Are used to trap the rats entering sewers C. Dissolve the foul gases D. Create symphonic action to increase the quick disposal of sewerage
Last Answer : ANS: A
Description : Pick up the incorrect statement regarding a master trap from the following: (A) It is provided in between the lower end of the house drain and the street sewer (B) It is provided a cleaning eye at the ... fitted at the top of the inlet pipe (D) The water seal is less than that of ordinary traps
Last Answer : (D) The water seal is less than that of ordinary traps
Description : Pick up the correct statement from the following: (A) In a gully trap, a water seal of 6 to 7.5 cm is provided (B) The gully trap collects waste water from the kitchen, sink, wash basins ... the sullage drain from the main drainage system (D) The grating provided over gully traps is 23 cm square
Last Answer : (B) The gully trap collects waste water from the kitchen, sink, wash basins, etc.
Description : Vent pipes are provided in a condenser to (A) Remove non-condensable gases (B) Purge the condenser (C) Facilitate easy cleaning of tubes (D) None of these
Last Answer : (A) Remove non-condensable gases
Description : Before working on an electric cargo winch master switch or controller, you should _____________. A. spray the gasket surface with a solvent B. drain condensate from the box C. open the circuit breaker in the power supply and tag D. heat the switch box to remove any moisture
Last Answer : Answer: C
Description : 'Flare tower' used in industry is meant for (A) Venting off (after burning) the excess inflammable/toxic gases at high pressure (B) Absorbing the pollutant gases from the furnace exhaust (C) Cooling of furnace exhaust gases (D) None of these
Last Answer : (A) Venting off (after burning) the excess inflammable/toxic gases at high pressure
Description : Who is the discoverer of inert gases ?
Last Answer : Helium - French astronomer Pierre Johnson Neon - British physicists Sir William Ramsay and Maurice W. Travers Argon-Lord Rayleigh and Sir William Ramsay Krypton- British physicists Sir William Ramsay and ... physicist E. Dorn Oganesan - Russian scientist and discoverer Yuri Oganesian.
Description : Why inert gases are one atom ?
Last Answer : Inert gases are very stable. The last energy level of any atom of these gases is filled by electrons. Electrons do not exchange or share with any of its other elements, not even among themselves. As a result, no bonds are formed, so inert gases are one atom.
Description : Which gases are inert and why ?
Last Answer : Inert gas-1. Argon II . Helium 3 . Neon 4 . Krypton 5 . Xenon 7 . Radon They are inert gases because they do not react with any other material.
Description : What are Inert gases and their use?
Last Answer : An inert gas is a gas that is generally non reactive with other substances. The term "inert" means non reactive. Gases are being chemically inert if their atoms don't combine with other atoms in ... process. Argon is used for filling electric bulbs. Xenon and Krypton are also used in light bulbs.
Description : A radioactive element X decays to give two inert gases X is
Last Answer : A radioactive element X decays to give two inert gases X is A. `._(92)^(238)U` B. `._(88)^(226)Ra` C. `._(6)^(14)C` D. `._(8)^(18)O`
Description : Electronegativity of inert gases is
Last Answer : Electronegativity of inert gases is A. low B. high C. zero D. abnormally high
Description : The order of abunndance of inert gases in the atmosphere is
Last Answer : The order of abunndance of inert gases in the atmosphere is A. `Ar lt Ne lt Xe` B. `Ar gt Ne gt Xe` C. `Ar gt Xe gt Ne` D. `Ne gt Ar gt Xe`
Description : The value of ionisation energy for inert gases is ________.
Last Answer : The value of ionisation energy for inert gases is ________. A. Zero B. Low C. High D. Negative
Description : The last member of the family of inert gases is
Last Answer : The last member of the family of inert gases is A. Argon B. Radon C. Xenon D. Neon
Description : Give reasons : a. Alkali metals have low ionization energies. b. Inert gases have exceptionally high ionization energies.
Last Answer : Give reasons : a. Alkali metals have low ionization energies. b. Inert gases have ... d. Noble gases possess relatively large atomic size.
Description : The electron affinity for the inert gases is (a) Zero (b) High (c) Negative (d) Positive
Last Answer : Ans:(a)
Description : Inert gases are - (1) Miscible with water (2) Not stable (3) Chemically uncreative (4) Chemically very active
Last Answer : (3) Chemically uncreative Explanation: An inert gas is a gas which does not undergo chemical reactions since their valence shells are filled, meaning they don't normally form chemical bonds with other ... inert gases, also called noble gases, are argon, helium, neon, krypton, xenon and radon.