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
Description : Which is not a hearth furnace? (A) Glass tank furnace (B) Open hearth furnace (C) Cupola
Last Answer : (C) Cupola
Description : Main use of hard coke produced by high temperature carbonisation is in the (A) Iron blast furnace (B) Cupola in foundries (C) Sinter making (D) Domestic ovens
Last Answer : (A) Iron blast furnace
Description : Pick up the correct statement from the following: (A) Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer (B) Cupola furnace is used for the manufacture of cast iron (C) Red short iron is of no value for welding purpose (D) All the above
Last Answer : Answer: Option D
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 : 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 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 : Which is the most thermally efficient furnace? (A) Reheating furnace (B) Reverberatory furnace (C) Rotary kilns (D) Boiler furnace
Last Answer : (D) Boiler furnace
Description : __________ is an indirectly heated furnace. (A) Open hearth furnace (B) Muffle furnace (C) Soaking pit (D) Reheating furnace
Description : Reheating furnace (pusher type) is used for heating (A) Ingots (B) Slabs (C) Steel coils (D) Steel sheets
Last Answer : (B) Slabs
Description : Which of the following is a periodic furnace? (A) Tunnel kiln (B) Rotary kiln (C) Soaking pit (D) Reheating furnace
Last Answer : (C) Soaking pit
Description : Which of the following is a directly fired intermittent furnace? (A) Walking beam reheating furnace (B) Reverberatory furnace (C) Tower furnace (D) Tunnel kiln
Last Answer : (B) Reverberatory furnace
Description : Which of the following is not a recuperative furnace? (A) Soaking pit (B) Reheating furnace (C) Steam boiler (D) Coke oven
Last Answer : (D) Coke oven
Description : An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace. (A) Walking beam (B) Shaft (C) Tunnel (D) Rotary hearth
Last Answer : (A) Walking beam
Description : The heating capacity of continuous reheating furnace depends upon the (A) Hearth area and furnace temperature (B) Emissivity of the stock (C) Ratio of wall surface to stock surface (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
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 : Tank furnace used for melting of glass is made of (A) Mild steel (B) Cast iron (C) Refractory blocks (D) Stainless steel
Last Answer : (C) Refractory blocks
Description : Which is a continuous furnace? (A) Coke ovens (B) Annealing furnace (C) Glass tank furnace
Last Answer : (C) Glass tank furnace
Description : An example of shaft furnace is the (A) L.D. converter (B) Glass melting tank (C) Blast furnace (D) Soaking pit
Last Answer : (C) Blast furnace
Description : Regenerator is widely used in: a) Reheating Furnaces b) heat treatment furnaces c) Baking Ovens d) glass melting furnaces
Last Answer : glass melting furnaces
Description : Cement Kiln is a (A) Rotary Kiln (B) Tunnel Kiln (C) Natural draft furnace (D) Batch furnace
Last Answer : (A) Rotary Kiln
Description : Turn down ratio of a burner (A) Should be as low as possible i.e., 1 : 2 (B) Should be 1:1 for a batch type furnace (C) Is the ratio of maximum to minimum permissible heat input rates (D) Is normally much more for a continuous furnace as compared to a batch furnace
Last Answer : (C) Is the ratio of maximum to minimum permissible heat input rates
Description : In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the (A) Rate of firing and emissivity of flame (B) Thermal conductivity of the charge & ... (C) Nature of process; whether batch, continuous or intermittent (D) All (A), (B) and (C)
Description : Semi steel' is (A) Produced by adding 10-20% steel to the cupola charge (B) Stronger than cast iron (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : Cast iron is (A) Used for making shock resisting parts (B) Manufactured in cupola and is brittle (C) Having compressive strength more than its tensile strength (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Cupola produces __________ iron. (A) Pig (B) Cast (C) Wrought (D) Carbon free
Last Answer : (B) Cast
Description : The product out from a cupola is called (A) Wrought iron (B) Pig iron (C) Cast iron (D) None of these
Last Answer : (C) Cast iron
Description : Which of the following is a vacuum filter? (A) Filter press (B) Rotary disc filter (C) Batch basket centrifuge (D) Tank filter (Nutsche filter)
Last Answer : (B) Rotary disc filter
Description : For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor. (A) Stirred tank (B) Tubular flow (C) Batch (D) Fixed bed
Last Answer : (A) Stirred tank
Description : Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature? (A) Time (B) Useful volume of the tank (C) Diameter of the reactor (D) None of these
Last Answer : (A) Time
Description : A reactor is generally termed as an autoclave, when it is a (A) High pressure batch reactor (B) Atmospheric pressure tank reactor (C) High pressure tubular reactor (D) Atmospheric pressure CSTR
Last Answer : A) High pressure batch reactor
Description : Which of the following is the most suitable for very high pressure gas phase reaction? (A) Batch reactor (B) Tubular flow reactor (C) Stirred tank reactor (D) Fluidised bed reactor
Last Answer : (B) Tubular flow reactor
Description : In a heat treatment shop, steel components are heat-treated in batches of 80 Tons. The heat treatment cycle is as follows; Increase temperature from 30 OC to 850 OC in 3 hours. ... efficiency of 80%, for same requirement. The investment towards installation of the new furnace is Rs. 50
Last Answer : Quantity of steel treated per batch - 80 Tons a. Efficiency of Furnace: Useful heat supplied to steel - 80000 x 0.12 x (850 - 30) = 7872000 kcal/batch .1 mark Total heat ... = Rs. 64400/batch Efficiency of new LPG furnace - 80% Heat supplied in new LPG furnace - 7872000/0.8
Description : Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners? (A) PCM (B) Tar (C) Light diesel oil (D) Low viscosity furnace oil
Last Answer : (C) Light diesel oil
Description : Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by (A) Biological oxygen pond (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate) (C) Lagoons (D) Filtration
Last Answer : (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
Description : Hearth furnaces are not used for (A) Roasting (B) Melting (C) Reheating (D) None of these
Last Answer : (D) None of these
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)
Description : Pot furnace which is either regenerative or recuperative, is used in the manufacture of (A) Glass (B) Stainless steel (C) Potteries (D) Refractory bricks
Last Answer : (A) Glass
Description : Typical waste gases temperature from glass melting furnace a) 1000-1550 oC b) 800-950 oC c) 650–750 oC d) 760-815 oC
Last Answer : 1000-1550 oC
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 : Name different methods of reheating?
Last Answer : (a) Gas Reheating (b) Live - steam reheating (c) Combined gas live steam reheater.
Description : Name Different Methods Of Reheating?
Last Answer : Gas Reheating. Live stream reheating. Combined gas live steam reheater.
Description : Apart from feed heating, what should a plant have to obtain a gain in thermal efficiency? a) Lubrication b) Differential heating c) Reheating cycles d) Regenerative cycles
Last Answer : c) Reheating cycles
Description : Reheating in a gas turbine (1) increases the compressor work (2) decreases the compressor work (3) increases the turbine work (4) decreases the turbine work
Last Answer : Reheating in a gas turbine increases the turbine work