Description : Traditionally, waste heat of low temperature range ________ has not been used for electricitygeneration despite efforts by ORC companies, mainly because the Carnot efficiency is rather low. a) 0-250 °C b) 0-150 °C c) 0-200 °C d) 0-120 °C
Last Answer : 0-120 °C
Description : Hot extrusion of aluminium is done in the temperature range of __________ °C. (A) 550-600 (B) 450-500 (C) 350-400 (D) 250-300
Last Answer : (C) 350-400
Description : Temperature attained in soldering of metals is about __________ °C. (A) 150-300 (B) 400-500 (C) 650-800 (D) 1000-1100
Last Answer : (A) 150-300
Description : The waste heat recovery unit (WHRU) is a tool involved in _______. a) Regeneration b) Cogeneration c) Both ‘a’ and ‘b’ d) None of the above
Last Answer : Cogeneration
Description : Minimum excretory urinary volume for waste products elimination during 24 hrs is (A) 200–300 ml (B) 200–400 ml (C) 500–600 ml (D) 800 ml
Last Answer : Answer : C
Description : Heat recovery equipment will be most effective when the temperature of flue gas is: a) 250oC b) 200 oC c)400 oC d) 280 oC
Last Answer : 400 oC
Description : A waste heat recovery unit (WHRU) is an_________ that transfers heat from process outputs at high temperature to another part of the process for some purpose, usually increased efficiency. a) Energy recovery heat exchanger b) Energy recovery heat diffuser c) Both ‘a’ and ‘b’ d) None of the above
Last Answer : Energy recovery heat exchanger
Description : A waste heat recovery unit is an energy recovery heat exchanger that transfers heat from process outputs at ........ a) High temperature b) Medium temperature c) Low temperature d) Both a & b
Last Answer : High temperature
Description : Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures. (A) 350 (B) 750 (C) 1050 (D) 1250
Last Answer : (B) 750
Description : What is the range of tempering temperature (°C) for most of the materials? (A) 75-100 (B) 200-300 (C) 350-450 (D) 500-600
Last Answer : (B) 200-300
Description : Utilizing the answer to the previous problem, estimate the overall or average increase in temperature ( ΔT) of the concrete roof from the energy absorbed from the sun during a12hour day. Assume that all of the radiation absorbed goes into ... °C b. 8.9°C c. 9.9°C d. 10.9°C formula: ΔQ = m c ΔT
Last Answer : 7.9 °C
Description : A thin, flat & square plate measuring 2 m 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will ... heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200
Last Answer : (B) 100
Description : In industrial operations fluids with temperature less than __________ are set as the limit for waste heat recovery because of the risk of condensation of corrosive liquids a. 80C b. 100C c. 120C d. 200C
Last Answer : 100C
Description : The solvent used in liquid extraction should not have high latent heat of vaporisation, because (A) The pressure drop and hence the pumping cost will be very high (B) It cannot ... by distillation may be prohibitively high (D) It will decompose while recovering by distillation
Last Answer : (C) Its recovery cost by distillation may be prohibitively high
Description : Calculate the recoverable waste heat (Q, in kCal/hour) from flue gases using the followingparameters: V (flow rate of the substance) 2000 m3/hr r (density of the flue gas): 0.9 kg/m3 Cp (specific heat ... (temperature difference): 120 oC h (recovery factor): 50% a. 21600 b. 43200 c. 25600 d. 34000
Last Answer : 21600
Description : Nellore to medium temperature waste heat recovery system the most suitable device is ------ a) Economizer b) Heat wheels c) Air preheater d) Recuperate d) Carbonate
Last Answer : Heat wheels
Description : In a low to medium temperature waste heat recovery system which of the device is most suitable a) Economiser b) Heat wheels c) air preheater d) Recuperator
Description : With regard to standard of quality of drinking water as laid down by Indian Railway , the requirement (desirable) limit of total dissolved solids should not be more than---------- mg/l a)200 b) 300 c) 400
Last Answer : d) 500*
Description : Normal serum glucagons level in fasting state varies between (A) 0-–10 pg/ml (B) 20–100 pg/ml (C) 200–300 pg/ml (D) 400–500 pg/ml
Last Answer : Answer : B
Description : In glycoproteins the carbohydrate is in the form of disaccharide units, the number of units are (A) 50–100 (B) 200–300 (C) 400–500 (D) 600–700
Last Answer : Answer : D
Description : Amylose contains glucose units (A) 100–200 (B) 200–300 (C) 300–400 (D) 500–600
Last Answer : C
Description : The heart of a normal adult human being weighs about _____ A. 200 grams B. 300 grams C. 400 grams D. 500 grams
Last Answer : ANSWER: B
Description : : Force exerted on a person by atmosphere is A. 200 000 N B. 300 000 N C. 400 000 N D. 500 000 N
Last Answer : 200 000 N
Description : Maximum root zone depth for Maize (a) 200-300 mm (b) 400-600 mm (c) 500-600 mm (d) 350- 450 mm
Last Answer : (b) 400-600 mm
Description : Number of meiotic divisions required to produce 200/400 seeds of pea would be (a) 200/400 (b) 400/800 (c) 300/600 (d) 250/500
Last Answer : (d) 250/500.
Description : The resistivity of a material with resistance 200 ohm, length 10m and area twice that of the length is a) 200 b) 300 c) 400 d) 500
Last Answer : c) 400
Description : What is the range of the visible light cure beam: A. 100-120 nm B. 200-300 nm C. 400-430 nm D. 470 nm or 450-500 nm
Last Answer : D. 470 nm or 450-500 nm
Description : Opportunity cost of increasing production of Gun to 4 units in combination E is –tons of bread (a) 200 ; (b) 500 ; (c) 300 ; (d) 400
Last Answer : (b) 500
Description : The concentration of Total Dissolved Solids (TDS) in drinking water should not exceed (A) 500 mg/L (B) 400 mg/L (C) 300 mg/L (D) 200 mg/L
Last Answer : (A) 500 mg/L
Description : Recrystallisation temperature of steel is __________ °C. (A) 50 (B) 300 (C) 500 (D) 800
Last Answer : (D) 800
Description : Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are ... __________ °C. (A) 400-500 (B) 900-1000 (C) 1400-1500 (D) 1700-1800
Last Answer : (B) 900-1000
Description : The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) (A) 2300 J (B) 4600 J (C) 230 J (D) 2.3 × 106 J
Last Answer : A) 2300 J
Description : The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively (A) 10 and 120 (B) 1 and 200 (C) 50 and 250 (D) 10 and 300
Last Answer : (B) 1 and 200
Description : Light oil whose major component is Benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C. (A) 80-170 (B) 200-300 (C) 250-270
Last Answer : (A) 80-170
Description : Optimum reaction temperature in steam reforming of naphtha is __________ °C. (A) 700 - 1000 (B) 300 - 450 (C) 1500-1700 (D) 100-200
Last Answer : (A) 700 - 1000
Description : The temperature in the calcium carbide furnace is __________ °C. (A) 200-300 (B) 700-850 (C) 2000-2200 (D) 4000-4500
Last Answer : (C) 2000-2200
Description : Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C. (A) 25 (B) 60-70 (C) 150-200 (D) 250-300
Last Answer : (B) 60-70
Description : Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C. (A) 80-120 (B) 200-300 (C) 600-800 (D) 1000-1100
Last Answer : (D) 1000-1100
Description : Motorized knapsack sprayer blade rotation at about ……. To rev/min. a. 200 to 300. c. 100 to 120 b. 120 to 400. d. 150 to 300
Last Answer : 100 to 120
Description : What are the benefits or the advantages of waste heat recovery units (WHRU)? a) Reduced Pollution b) Reduced equipment sizes c) Reduced auxiliary energy consumption. d) All of the above
Last Answer : All of the above
Description : One of the key areas for ....... energy saving in existing systems is waste heat recovery. a) Potential b) Kinetic c) Thermal d) Electrical
Last Answer : Potential
Description : Techniques of waste heat recovery ....... a) Direct contact condensation b) Indirect contact condensation c) Transport membrane condensation d) All of the above
Description : A waste heat recovery system in industrial process has been key to reduce ....... Consumption. a) Coal b) Fuel c) Biogas d) Oil
Last Answer : Fuel
Description : A major advantage of waste heat recovery in industry is a) Reduction in pollution c) Increase efficiency d) None of the above
Last Answer : Reduction in pollution
Description : Recovery of waste heat from hot fluid to fluid is called: a) thermo compressor b) waste heat recovery boiler c) heat Pump d) economizer
Last Answer : heat Pump
Description : Recovery of heat from dryer exhaust air is a typical application of: a) Waste heat recovery boiler b) Heat pump c) Heat wheel d) Economizer
Last Answer : Heat wheel
Description : Air preheater is not used as a waste heat recovery system in a____. a) Boiler b) billet Reheating Furnace c) Heat treatment furnace d) compressor
Last Answer : compressor
Description : Recuperated is used mainly as a waste heat recovery system in a ____. a) Boiler b) Billet Reheating Furnace c) Compressor d) None of the above
Last Answer : Billet Reheating Furnace
Description : Major advantage of waste heat recovery in industry is: a) Reduction in pollution b) increase in efficiency c) Both a & b d) none of the above
Last Answer : Both a & b
Description : The combined mass of car and passengers travelling at 72 km/hr is 1500 kg. Find the kinetic energy of this combined mass. (Formula: K =mv2 / 2k ) a. 300 kJ b. 200 kJ c. 500 kJ d. None of the above
Last Answer : 300 kJ