Description : Cast steel is manufactured by (A) Cementation process (B) Crucible process (C) Bessemer process (D) Open hearth process
Last Answer : Answer: Option B
Description : Softer variety of steel may be obtained by (A) Cementation process (B) Crucible process (C) Bessemer process (D) Open hearth
Last Answer : Answer: Option C
Description : The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as (A) Cementation process (B) Crucible process (C) Bessemer process (D) Open hearth process
Description : The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called (A) Cementation process (B) Crucible process (C) Bessemer process (D) Open hearth process
Last Answer : Answer: Option A
Description : Blister steel (A) Is obtained by cementation process (B) Is full of fissures and cavities (C) Can be easily welded (D) All the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) Steel produced by open hearth process is milder than that obtained by the Bessemer process (B) Engineers prefer open hearth steel ... is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
Description : Pick up the correct statement from the following: (A) In basic Bessemer process, the steel heats the converter (B) In open-hearth process, the furnace heats the steel (C) In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore (D) All the above
Description : In India the rails are manufactured by A. Open hearth process B. Duplex process C. Both A & B D. None of These
Last Answer : C [Both A & B]
Description : Bessemer process is used for the manufacture of (A) Pig iron (B) Cast iron (C) Wrought iron D) Steel
Description : The variety of pig iron used for the manufacture of steel by Bessemer process, is (A) Bessemer pig (B) Grey pig (C) White forge pig (D) Mottled pig
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 : For high grade instruments the steel preferred to, is (A) Cast steel (B) Bessemer steel (C) Mild steel (D) Whitworth compressed steel
Description : The steel used for the manufacture of rails, is (A) Bessemer steel (B) Mild steel (C) Cast steel (D) Stainless steel
Description : Material of construction of foundry crucible is (A) Lead (B) Stainless steel (C) Graphite
Last Answer : Option C
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 : 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 : Regenerators are installed in (A) Coke ovens (B) Open hearth furnace (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : __________ is an indirectly heated furnace. (A) Open hearth furnace (B) Muffle furnace (C) Soaking pit (D) Reheating furnace
Last Answer : (B) Muffle furnace
Description : Thermal efficiency of an open hearth furnace may be about __________ percent. (A) 5 (B) 20 (C) 50 (D) 80
Last Answer : (B) 20
Description : Which of the following is not a directly fired furnace? (A) By-product coke oven (B) Calcination kiln (C) Sintering furnace (D) Open hearth furnace
Last Answer : (A) By-product coke oven
Description : An example of recuperative furnace is the (A) Soaking pit (B) Open hearth furnace (C) Coke ovens (D) None of these
Last Answer : (A) Soaking pit
Description : Which is a regenerative furnace? (A) Coke oven heating chamber (B) Open hearth furnace (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : Which is not a hearth furnace? (A) Glass tank furnace (B) Open hearth furnace (C) Cupola
Last Answer : (C) Cupola
Description : Expanded metal is (A) Manufactured from steel sheets (B) Used for reinforced concrete in road pavements (C) Measured in term of SWM (short way mesh) and LWM (long way mesh) (D) All the above
Description : Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Description : For light and ornamental casting, the most unsuitable pig iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Description : If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Description : The variety of pig iron used for manufacture of wrought iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White forge pig (D) Mottled pig
Description : Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Description : Assertion` :` In open circulatory system blood is pumped by heart passes throgh large vessels into open spaces or body cavities called sinuses. Reason
Last Answer : Assertion` :` In open circulatory system blood is pumped by heart passes throgh large vessels into open ... D. If both Assertion & Reason are false.
Description : Open circulatory system is the one in which blood does not circulate only inside blood vessels but it also falls in cavities that irrigate tissues. In the open circulatory system ... and protochordates have open circulatory system. The Circulatory System - Image Diversity: open circulatory system
Last Answer : What is a closed circulatory system?
Description : Steel pipes are normally manufactured by __________ process. (A) Extrusion (B) Cold working (C) Forging (D) Electroforming
Last Answer : (A) Extrusion
Description : If temporary cementation is required, which cement will you use: A. ZOE B. Zinc Polycarboxylate C. GIC
Last Answer : A. ZOE
Description : Define cementation. Describe sherardizing with help of neat labeled diagram
Last Answer : Cementation: Cementation is the process in which metal coatings are obtained by heating the base metal in a revolving drum containing a powder of the coating metal. Process: i) The iron articles ... iron forming Fe - Zn alloy at the surface which protects iron surface from corrosion.
Description : Define Cementation. Name its types.
Last Answer : Cementation: It is the process of heating the base metal in a revolving drum containing a powder of coating metal. Types: i) Sherardizing ii) Chromizing iii) Colorizing
Description : (i) Copper - Bessemer converter (ii) Iorpn- Blastfurnace (iii) chromium - Aluminothermic process (iv) Tin - Carbon reducaton (v) Zinc -Belgian process
Last Answer : (i) Copper - Bessemer converter (ii) Iorpn- Blastfurnace (iii) chromium - Aluminothermic process (iv ... data how many of them are correctly matched ?
Description : How did the Bessemer process lead to a boom in the railroads?
Last Answer : What is the answer ?
Description : In the acid Bessemer process, the hot metal should have the following composition. (A) S < 0.05% and P < 0.05% (B) S < 0.05% and P < 1.5% (C) S < 0.05% and P > 1.5% (D) S > 1.5% and P < 0.05%
Last Answer : (A) S < 0.05% and P < 0.05%
Description : What causes earthquakes? (a) Occurrence of underground water (b) Volcanic eruptions (c) Occurrence of cracks and fissures in rocks (d) No definite cause has been found so far
Last Answer : Ans: (b)
Description : A longitudinal tear or ulceration in the lining of the anal canal is termed a (an) a) anal fissure. Fissures are usually caused by the trauma of passing a large, firm stool or from persistent ... beside the anus. d) hemorrhoid. A hemorrhoid is a dilated portion of vein in the anal canal.
Last Answer : a) anal fissure. Fissures are usually caused by the trauma of passing a large, firm stool or from persistent tightening of the anal canal secondary to stress or anxiety (leading to constipation).
Description : Irritation of the lips associated with scaling, crust formation, and fissures is termed a) leukoplakia. Leukoplakia is characterized by white patches, usually on the buccal mucosa. b) lichen ... a reddened circumscribed lesion that ulcerates and becomes crusted and is a primary lesion of syphilis.
Last Answer : a) leukoplakia. Leukoplakia is characterized by white patches, usually on the buccal mucosa.
Description : Community water fluoridation MOST effectively achieves: a. 90. 95% reduction of caries. b. 45. 55% reduction of caries. Esta se corrects si no tuviera la ultima opcion c. Reduces pit and fissures caries more than smooth surfaces. d. Reduces smooth surfaces more than pit and fissures.
Last Answer : d. Reduces smooth surfaces more than pit and fissures.
Description : Class V lesions may originate: A. In lingual pits B. In buccal fissures C. Poor oral hygiene
Last Answer : C. Poor oral hygiene
Description : Community water fluoridation MOST effectively achieves is:** A. 90-95% reduction of caries B. 45-55% reduction of caries C. Reduces pit and fissures caries more than smooth surfaces D. Reduces smooth surfaces more than pit and fissures
Last Answer : D. Reduces smooth surfaces more than pit and fissures
Description : .Fluoridation is the adjustment of the fluoride content of a community water supply to optimum levels for caries prevention. Which of the following statement is correct? A. Tooth decay ... in smooth surface caries from in pit and fissures D. Fluoridation increases vulnerability to osteoporosis
Last Answer : C. Greater reduction in smooth surface caries from in pit and fissures
Description : Benign migratory glossitis or Geographic Tongue, manifests itself in the oral cavity as, A. Irregularly outlined areas of hyperkeratosis of the dorsal surface of the tongue B. Furrows outlined the ... (fissures) radiating from a central fissure G. Irregular area in the midline of the tongue
Last Answer : C. Loss (atrophy) of filiform papillae in multiple irregularly outlined areas
Description : Fire refining process is employed in case of (A) Tin (B) Copper (C) Zinc (D) Aluminium
Last Answer : (B) Copper
Description : Steel balls are manufactured by (A) Sintering (B) Casting (C) Cold heading (D) Spinning
Last Answer : (C) Cold heading
Description : Factory equipment allows hermetically sealed sanitary steel cans to be manufactured and later sealed at the rate of ____ units per minute. a. 500 c. 1,000 b. 1,500 d. 1,200
Last Answer : c. 1,000