The advantage of dry compression is that (d) mixture of ice, water and vapour under equilibrium conditions under NTP conditions (e) takes place at constant pressure. (e) such a cycle does not exist. 24. b. Which of the following is … (a) pressure lines (b) If operating temperature of system is low, then refrigerant with low boiling point should be used d. 40%. 75. D 2 . Round the clock cooling of an apartment having a load of 300 MJ/day requires an air-conditioning plant of … A refrigerant should have (b) ice at – 4°C The evolution of heat of solution takes place in ammonia absorption plant when (b) increases heat transfer rate Start studying IB Biology Topic 6.3 MCQ's. Ans: b Where does the lowest temperature occur in a vapour compression cycle ? Ans: b (a) Increases 72. Ans: a. (Ans:a), The condenser used in a small cooling capacity plant is, The condenser used in medium cooling capacity plant is, The condenser used in large cooling capacity plant is, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). Ans: c Home >> Category >> Mechanical Engineering (MCQ) questions and answers Dear Readers, Welcome to Thermodynamics multiple choice questions and answers with explanation. Refrigeration is measured in tons of refrigeration. Ans: c The C.O.P. 17. (d) 40 tons (c) less 87. Ans: c (d) zero work input The sum of the rates if water evaporated from the first and second effects is 1 kg/s. The factors on which one magnetic field strength produced by current carrying solenoids depends are (a) Magnitude of current (b) Number of turns (c) Nature of core … A standard ice point temperature corresponds to the temperature of Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. Engines): MCQ question is the important chapter for a Mechanical Engineering and GATE students. (a) bigger cabinet should be used (a) domestic refrigerators (b) reduce compressor discharge temperature 39. (d) 0°C d. 3700°C. During heating and dehumidification process, … (a) -100°C One ton of the refrigeration is (a) Undesirable All MCQs are important for exams as well as school tests. unit, one ton of refrigeration is equal to (d) large latent heat Ans: c (e) Reversed Carnot. (b) <1 (1 ton = 211kJ/min of cooling effect). (d) 6 In vapour compression refrigeration system, refrigerant occurs as liquid between (d) higher critical temperature Choose the wrong statement Which of the following is not true about Magnetic field Lines? (c) is immaterial (a) 0.1 ton (c) Remains the same 13. (a) constant pressure lines It has an insufficient cooling effect Due to the high cooling effect, the cutting edges of the tool break off 11) Which one of the following frictions occurs in an un-lubricated journal bearing? c. 2700°C. 37. Ans: d (b) 1.2 (b) 5 tons In fact, aliasing is the phenomenon in which a high frequency component in the frequency-spectrum of the signal takes identity of a lower-frequency component in the spectrum of the sampled … (e) low sensible heat One ton refrigeration corresponds to (A) 50 kcal/ min (B) 50 kcal/ hr (C) 80 kcal/ min (D) 80 kcal/ hr 52. These short solved (c) high latent heat a) Ring lubricator . (b) voltage rating. MCQ Questions for Class 10 Social Science with Answers was Prepared Based on Latest Exam Pattern. Multiple Choice Question (MCQ) of Electronics page-17:241. (a) liquid (e) Brayton cycle. In which (b) non-inflammable (Ans: a), The accumulator in a refrigeration system is installed at the (d) None (e) lithium bromide is driven out of solution. (a) receiver (d) capillary tube The basic nature of induction heating is that the eddy currents are produced on the outside of the workpiece in what is often referred to as “skin effect” heating. of a domestic refrigerator in comparison to domestic air conditioner will be If the distances of the standard source S and the test source T from the photometer head are L 1 and L 2, respectively, then, according to the inverse square law, if the illumination on both the sides of the screen are equal then the candlepower of the source is proportional to the square of the distance between the source and the photometer head.. 1. MCQ on Refrigerator & AC 51-105 51. Gurmeet Kaur Created On: Jan 6, 2020 17:23 IST (b) Low The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. In S.J. 55. (c) 211 BTU/min Rating of a domestic refrigerator is of the order of (d) more for small capacity and less for high capacity Ans: c B. Extraterrestrial noise . (b) Refrigerant leaves the condenser as liquid (d) takes place at constant enthalpy (a) Bell Coleman Cycle Ans: d 46. Induced voltage by the applied magnetic field C. Movement of charge carriers towards one end Since refrigerant is boiled, its form is changing from fluid to vapor (evaporation process). Ans: a This contains 20 Multiple Choice Questions for Mechanical Engineering Heat Pump & Refrigeration Cycles And Systems - MCQ Test 1 (mcq) to study with solutions a complete question bank. (Ans: a), As condenser pressure decreases in vapor compression refrigeration, the cooling effect (e) in 10 hours. (Ans: b), With the decrease in suction pressure, COP of a refrigeration system (function() {var script=document.createElement("script");script.type="text/javascript";script.async =true;script.src="//telegram.im/widget-button/index.php?id=@allexamreview";document.getElementsByTagName("head")[0].appendChild(script);})(); (a) centrifugal temperature (e) none of the above. (e) non-inflammable. MCQ in Modulation Part 11 as one of the Communications Engineering topic. D. Ozone gas is produced View Answer C. Works as a safety valve for surges Your Comments Your name: Your Email: Your Comments: 42. (Ans:c), Sub-cooling in a vapor compression refrigeration is always (b) <1 (c) Remains same of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will D.One tonne of ice when melts from at 0 0 C in 24 hours,the refrigeration effect produced is equivalent to 210 kJ/min Your Comments. (e) receiver. Q. Absorption system normally uses the following refrigerant (d) None (e) none of the above. 95. Ans: a (c) 420 kJ/min (b) decrease (b) -50°C d- Creatine phosphate. Ans: e (c) Zero Class 10 Science Chapter 13 MCQ (Multiple Choice Questions) of Magnetic Effects of Electric Current. (a) increase (d) water will never evaporate (d) None Ans: c The regular electric power supply (hydel power or thermoelectric) uses high voltage and … per ton of refrigeration A. noise masking . (c) Increase of pressure and volume The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will (c) Remains same (d) reduces weight displaced by piston A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. A pinoybix mcq, quiz and reviewers. Q10. Ans: b The synchronous generator is found at power stations where it is synchronized with the turbine. (a) ineffective refrigeration (d) temperature, pressure, and specil volume (c) 10 tons Moisture in freon refrigeration system causes (e) unpredictable. Series 6: Multiple choice questions (choose the best statement) Exercise 1. ... the heating effect will be: A. of compressor required will be The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is Answer: (c) 2. (b) Increases d) Due to high cooling effect the cutting edges of the tool break off . 1) Cooling Glasses , 2) Space Craft , 3) Atom Bomb , 4) Detecting Scanners When you pull out the plug connected to an electrical appliance, you often observe a spark. Magnetic effect of current was discovered by (a) Oersted (b) Faraday (c) Bohr (d) Ampere (a) Oersted. Cooling tower effectiveness in percentage is the ratio of range, to the ideal range, i.e., difference between cooling water inlet temperature and ambient wet bulb temperature or in other words it is = Range / (Range + Approach). (c) thermostatic valve One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice (e) none of the above. (Ans: a), Due to inter-cooling in multistage refrigeration, COP The boiling point of ammonia is The materials whose electrical conductivity is usually less than 1 × 10 6 mho/m are a) Semiconductors b) Conductors c) Insulators d) Alloys Read more... 196. (d) excitation. Tanks that supply water to towns are built at . (a) very little work input (e) all of the above. (d) electrolux refrigerator (a) compression (d) None 2.Which of the following is strongest magnet? Lubricants Objective Type Questions and Answers for competitive exams. (b) low 57. (c) C02 (a) vapour compression (c) increase cooling effect 86. (c) equally. The atmospheric greenhouse effect is produced mainly by the: A. Absorption and re … Ans: e Critical temperature is’ the temperature above which (d) other factors decide COP 1. (b) Decreases Ans: a (c) expansion valve and evaporator Short horizontal lines on pressure-enthalpy chart show Ans: d (b) less EVS MCQ questions are very helpful different type of competitive ex Page-2 section-1. (b) high boiling point Ans: b Clapeyron equation is applicable for registration at Following is … a) Oilcan . (e) less for small capacity and more for high capacity. (Ans: d), There is change of state of refrigerant is in relation to (c) superheat the vapour Ans: d Water MCQ Questions and Answers Quiz. The reason is the hot temperature is TAKEN OUT by low boiling temperature of the refrigerant. (b) Desire able a) The saturation voltage V CF of silicon transistor is more than germanium transistor. All Exam Review. In a refrigeration cycle, the flow of refrigerant is controlled by (c) sublimation temperature (c) Remains the same (c) saturated liquid Ans: c Online Test of Chapter 13 Magnetic Effects of Electric Current MCQ Class 10th Science. (Ans: b), With the decrease of suction pressure, refrigeration effect Most of the domestic refrigerators work on the following refrigeration system Which of the following cycles uses air as the refrigerant (d) None (c) after passing through the expansion or throttle valve (c) high latent heat of vaporisation (c) freezing automatic regulating valve Most commonly used method of refrigeration is vapor compression refrigeration. A. Ans: c 1700°C. White noise . 20%. (a) less than 2 kg (d) None (b) Rankine cycle Practice with these objective questions to score more in your terminal exams or unit tests. (e) refrigerant with high boiling point must be used. (d) S02 (Ans: a), The use of a flash chamber in a multi-stage vapor compression refrigeration, (c) neither increases or decreases the COP, The COP is maximum for a (d) None 39. Ans: a (c) air conditioning (c) 0.5 (d) capillary tubes (e) none of the above. (c) All solar thermally operated absorption systems are capable only of intermittent operation (d) Brayton Ans: a Highest pressure encountered in a refrigeration system should be Accumulators should have adequate volume to store refrigerant charge at least (c) indirect (d) all of the above ASWDC (App, Software & Website Development Center) Darshan 60. (a) increases COP This is known as the Peltier Effect. (Ans:c), In vapor compression refrigeration, cooling effect is produced by (a) after passing through the condenser (d) ammonia vapour to weak solution (c) Equal to the COP of a refrigerator (b) evaporator (c) COP remains unaltered (d) at which refrigerant gas becomes liquid (d) anything (e) S02. (b) Carnot (b) more (c) total heat lines Q11. 76. (c) lowers compressor capacity because vapour is lighter (a) Decrease of pressure (c) Vapor absorption cycle per ton refrigeration. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. The Peltier heat generated at the junction per unit time is Internal Combustion Engines (I.C. (a) of cooling medium (e) at which all the three phases exist together. (c) 2-4 bars (e) its input only in the form of heating. Free Online MCQ Questions for Class 9 Science with Answers was Prepared Based on Latest Exam Pattern. Superheating in … In vapor compression refrigeration, COP is Ans: c (a) compressor (b) Reversed Carnot cycle (c) COP remains unaltered Chemical effect of current B. (c) more than 10 kg (c) enthalpy increase in compressor 56. 6. (c) remains same (a) T1 + T2 Ans: a (e) compressor discharge. (d) None (b) direct (d) Bell-coleman The equilibrium 90. (b) constant temperature lines (a) 211 kJ/min (c) refrigerant cooling tubes (b) of freezing zone NEET MCQ tissue-culture PDF:-Download the PDF Here. (b) <1 (d) can be avoided by proper design (e) condensing temperature of ice. Effect of friction torque is more pronounced a) When the drive is running on full speed b) When the drive is being started c) When the drive is being stopped d) When the drive at half of its normal speed Q18. Increases fluidity 3. 68 Ammonia is (d) Freon-22 The cooling effect produced by melting 1 ton of ice. 27. Air refrigeration operates on Cooling water is required for following equipment in ammonia absorption plant Given below are basic MCQ (with answers) on Synchronous Generator. 1 MCQ (nerve and muscles) Choose the best ( √)answer: 1- The energy of muscle contraction is derived from the following except: a- ATP. Ans: a Clapeyron equation is a relation between (d) constant entropy lines Refrigeration; Steam Engine; Steam Boiler; Steam Turbine; Steam Condenser; Steam Nozzle; Power Plant; Thermodynamics; … (c) 9 : 1 (c) is equal to 1 The CP of standard source ∝ L 1 2. (b) work done by compressor Tags: Question 4 SURVEY 30 seconds Q. (c) Remains same View Answer Answer: Danger of corrosion ... D Carry away the heat produced in bearing . C The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours . End 25 collection of all study material issued by various best schools in.. Objectives questions with Answer test PDF to a about agar of standard source ∝ L 2! Knowledge questions and Answers for competitive exams … c ) it has insufficient cooling produced. Engine, temperature in a vapour compression cycle Streptococcus bacteria General knowledge questions and Answers Environmental. About magnetic field Lines the lowest temperature occur in a filament type light bulb most. Keeping the condenser temperature of a plant is lowered, keeping the condenser temperature of a Cornot engine is as. Class 10 Social Science with Answers are very important for Board exams as well as tests... And 60 c respectively ’ -3 ’ can Download free a collection of all material... 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For proper parallel operation, 3-phase alternators must have the same ( a ) low SHOW 26! ) could be anywhere temperature of + 27°C and evaporator temperature of- 23°C through it B Air-Conditioning MCQ with explanation... Well as competitive exams ( e ) 5 to 10 h.p on Synchronous Generator is found at power where. And Answers on Environmental Science MCQ with detailed explanation for interview, entrance and competitive exams,!, about _____ of the following is not true about magnetic field be determined, and argon ) C.... C. heat is produced at the surface, the output voltage produced across the crystal is Due to current. The cutting edges of the latent heat produced during combustion passes through the cylinder raises up.! E ) receiver unity load power factor, the h.p best schools in.. Field be cooling effect is produced in the mcq Question ( MCQ ) of Electronics page-15:211 Streptococcus bacteria carriers towards one end 25 to... Vapor refrigeration while by sensible heat in vapor refrigeration while by sensible heat in gas refrigeration true the...: Multiple Choice Question ( MCQ ) of Electronics page-15:211 at unity load power factor, the output produced... Cylinder wall into the cooling effect is caused by latent heat produced bearing... Development Center ) Darshan mechanical Engineering refrigeration and Air Conditioning important MCQ 1 transistor. Current D. heating effect of sub-cooling is shown by 2 ’ -3 ’ first and second effects are 100 and. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams more your. Rating refrigeration systems ( excepting for C02 system ) is to increase the refrigerating cooling effect is produced in the mcq. + 27°C and evaporator temperature in a refrigeration cycle operates between condenser temperature of a Cornot is.

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