Description : Hearth furnaces are not used for (A) Roasting (B) Melting (C) Reheating (D) None of these
Last Answer : (D) None of these
Description : Which of the following furnaces will have maximum thermal efficiency? (A) Soaking pits (B) Walking beam reheating furnace (C) Boiler furnace (D) Rotary kilns
Last Answer : (C) Boiler furnace
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 : Capillary wick is a part of a) heat pump b) heat wheel c) heat pipe d) regenerator
Last Answer : heat pipe
Description : Regenerators are normally provided in the (A) Glass melting furnace (B) Open hearth furnace (C) By product coke ovens (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
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 : Which of the following is a heat treatment furnace? (A) Muffle furnace (B) Annealing furnace (C) Reheating furnace (D) Rotary kiln
Last Answer : (B) Annealing furnace
Description : Pick up the odd one out: b) Regenerator c) Recuperator d) Metallic recuperator e) Economiser
Last Answer : Economiser
Description : Where can I find extra baking pans such as muffin tins and loaf pans especially made for toaster ovens?
Last Answer : You can find a lot of accessories for your toaster oven. Amazon has baking sheets, cookie sheet and small Pizza pans. Walter Drake and Miles Kimball sell specialized baking pans and muffin tins for toaster ovens too.
Description : The first widely used commercial form of Artificial Intelligence (Al) is being used in many popular products like microwave ovens, automobiles and plug in circuit boards for desktop PCs. What is name of AI? A. Boolean logic B. Human logic C. Fuzzy logic D. Functional logic
Last Answer : C. Fuzzy logic
Description : Sensible heat of hot industrial flue gases cannot be recovered by a/an (A) Economiser (B) Regenerator (C) Ceramic recuperator (D) None of these
Description : In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time? (A) Recuperator (B) Regenerator (C) Waste heat boiler (D) None of these
Last Answer : (B) Regenerator
Description : Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace? (A) Economiser (B) Regenerator (C) Ceramic recuperator (D) Waste heat boiler
Description : Which of the following is a batch furnace? (A) Cupola (B) Reheating furnace (C) Glass tank furnace (D) None of these
Last Answer : (A) Cupola
Description : The silica is used for preparing (A) Silica bricks (B) Coke oven (C) Lining for glass furnaces (D) All of these
Last Answer : Answer: Option D
Description : are portable devices capable of estimating the combusting efficiency of furnaces, boilers, or other fossil fuel burning machines. a) Sound analyzer. c) Combustion analyzer. b) Light analyzer. d)Temperature analyzer
Last Answer : Combustion analyzer.
Description : are portable devices capable of estimating the combusting efficiency of furnaces, boilers, or other fossil fuel burning machines. a) Sound analyzer. b) Light analyzer. c) Combustion analyzer. d) Temperature analyzer.
Description : To what degree can I heat the glass baking dish?
Last Answer : If the glass is tempered, it can easily withstand heats of up to 500 degrees F. Look at the imprint at the bottom of your dish to find out if it is tempered to withstand the heat of an oven. If not, glass may shatter around 375 degrees F, so watch out and be sure to check!
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 : Which is a continuous furnace? (A) Coke ovens (B) Annealing furnace (C) Glass tank furnace
Last Answer : (C) Glass tank furnace
Description : In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by (A) Conduction (B) Convection (C) Radiation (D) Cannot be predicted
Last Answer : (C) Radiation
Description : Thermal efficiency of furnaces can be improved by (A) Waste heat recovery from flue gas (B) Minimising heat losses from furnace walls (C) Maintaining proper draught (D) All (A), (B) and (C
Last Answer : (D) All (A), (B) and (C
Description : Fuel economy in furnaces can be achieved by (A) Using oxygen enriched combustion air (B) Preheating the combustion air (C) Reducing the heat loss through furnace openings & doors (D) All (A), (B) and (C
Description : The heat recoverable from flue gases of furnaces depends on the (A) Thermal efficiency of furnace (B) Quantity of flue gases (C) Flue gas temperature drop through the furnace (D) All (A), (B) and (C)
Description : Maximum heat transfer in high temperature furnaces is by (A) Conduction (B) Convection (C) Radiation (D) Either (A), (B) or (C); depends on the type of furnace
Description : Forced recirculation of furnace gases is practised (A) To increase heat transfer by convection (B) To ensure uniform temperature (C) In furnaces, operating below 750°C (D) All (A), (B) and (C)
Description : What is the amount of heat needed to turn 1 kg of the substance at its melting point from the solid to liquid state? A. Heat of fusion B. Heat of vaporation C. Heat of condensation D. Heat of fission
Last Answer : Heat of fusion
Description : A regenerator is a________ device. A) one-layer B) two-layer C) three-layer D) four-layer
Last Answer : four-layer
Description : A ________ is a repeater. A) regenerator B) ADM C) STS multiplexer/demultiplexer D) none of the above
Last Answer : STS multiplexer/demultiplexer
Description : Which of the following is the most suitable for preheating combustion air above 650°C? (A) Regenerator (B) Metallic recuperator (C) Ceramic recuperator (D) None of these
Last Answer : (C) Ceramic recuperator
Description : The use of regenerator in a gas turbine cycle (1) increases efficiency but has no effect on output (2) increases output but has no effect on efficiency (3) increases both efficiency and output (4) increases efficiency but decreases output
Last Answer : The use of regenerator in a gas turbine cycle increases efficiency but has no effect on output
Description : I put a music CD on top of my microwave oven (by mistake) and then used the microwave oven to heat food. Has the oven's magentron done anything to damage the CD?
Last Answer : I have a stack of CD’s next to my microwave, and haven’t noticed any problem. Doesn’t the CD play now?
Description : In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred (A) Through a metallic wall (B) By direct contact of hot flue gas with air (C) By ... material (like chequor bricks) and then heating the air from this hot material (D) None of these
Last Answer : (C) By heating an intermediate material (like chequor bricks) and then heating the air from this hot material
Description : Regenerators are used for waste heat recovery in (A) By-product coke ovens (B) Beehive coke oven (C) Blast furnace stoves (D) Soaking pits
Last Answer : (A) By-product coke ovens
Description : Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr. (A) 2.5 (B) 0.5 (C) 10 (D) 20
Last Answer : (A) 2.5
Description : Why is it no longer required to reduce the oven temperature when baking in glass?
Last Answer : I just made a white cake (Kroger brand) with my daughter last week. I can’t remember if it mentioned glass, but it did mention dark non stick pans. Next time I go to the grocery store, I’ll check.
Description : What type of glass baking dish is both microwave and oven safe?
Last Answer : Pyrex (the traditional borosilicate glass Pyrex made by Corning before 1998) is safe for both applications. Avoid the more recent Pyrex made by World Kitchen. The January 2011 issue of Consumer Reports indicates that it is not safe.
Description : How do you regulate time and temperature when baking in a glass dish versus a metal one?
Last Answer : You should generally regulate one and not the other for consistency. One good method is to keep the cook time the same but reduce the oven temperature by 25 degrees when using glass pans.
Description : The biggest point sources of waste heat originate from ....... production. a) Steel or Brass b) Copper or Glass c) Steel or Glass d) Steel or Copper
Last Answer : Steel or Glass
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 : Vycor, a widely used material for making 'thermal wells' in temperature measurement, is a (A) Cermet (B) Glass (C) Thermosetting plastic (D) Metallic alloy
Last Answer : (B) Glass
Description : plows are preferable in the upland systems but as yet not widely available in Asia. A. Disk. C) Chisel B. Tined. D) Sub soiling
Last Answer : Tined
Description : What is the appropriate oven temperature for reheating?
Last Answer : 300 degrees for about 15 minutes.
Description : Why does reheating coffee in a microwave oven kill its taste?
Last Answer : Not for me John… i do it all the time. Taste buds i guess. They say as you get older, the taste buds change. Not mine. Or maybe, i’ve not noticed it. I still love my drinks and food.
Description : Does this microwave feature preprogrammed buttons with settings for cooking items such as popcorn, potatoes, or reheating?
Last Answer : Yes, the Maytag Maytag MMV4205BAS 2.0 CuFt Over-The-Range Microwave does have preprogrammed buttons with settings for cooking items such as popcorn, potatoes, and reheating.
Description : An example of indirectly heated furnace is the (A) Soaking pit (B) Muffle furnace (C) Reheating furnace (D) None of these
Last Answer : (B) Muffle furnace
Description : Neutral atmosphere is maintained in a/an __________ furnace. (A) Cold rolled steel coil annealing (B) Open hearth (C) Soaking pit (D) Walking beam reheating
Last Answer : (A) Cold rolled steel coil annealing
Description : The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent. (A) 15 (B) 40 (C) 70 (D) 85
Last Answer : (B) 40
Description : Which furnace employs preheating, heating and soaking zones? (A) Soaking pit (B) Reheating furnace (C) Open hearth furnace (D) Cupola
Last Answer : (B) Reheating furnace