75451. In spot welding, the spacing between two spot weld should not be less than
75452. Aluminium is the best material for making patterns because it is
75453. Gagger is used for cleaning the moulding sand.
75454. In sheet metal work, the cutting force on the tool can be reduced by
75455. In order to get uniform thickness of the plate by rolling process, one provides
75456. A pouring basin acts as a reservoir for the molten metal.
75457. In bending operation, the metal takes the shape of a punch.
75458. The cold working of metals is carried out
75459. Lancing is the operation of
75460. Notching is the operation of
75461. The shrinkage allowance for cast iron pattern is
75462. An oxidising flame is obtained when equal volumes of oxygen and acetylene are supplied.
75463. A neutral flame is obtained by supplying
75464. An oxidising process used for aluminium and magnesium articles is called
75465. For welding plates of thickness less than 5 mm, its edges
75466. In order to cut mild steel, the cutting angle of chisel should be
75467. The operation of straightening a curved sheet metal, is known as
75468. The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap.
75469. Tandem drawing of wires and tubes is necessary because
75470. In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.
75471. Cold working requires much higher pressure that hot working.
75472. The operation of bending a sheet of metal along a curved axis, is known as
75473. In a __________ , two or more operations are performed simultaneously at the single stroke of the ram.
75474. A rip saw
75475. The welding set up is said to have reversed polarity when the work is connected to the negative terminal and the electrode holder to the positive terminal.
75476. For welding plates of thickness more than 12.5 mm, its edges
75477. In electric resistance welding, voltage required for heating is
75478. Most of the oxy-acetylene welding is done with
75479. The cutting edge of a chisel should be
75480. Scab is a casting defect which occurs as sand patches on the upper surface of a casting.
75481. In order to check the clearance between two mating surfaces, a __________ gauge should be used.
75482. When the weld is made from left to right, it is known as back-hand welding.
75483. The current in electric resistance welding can be regulated by
75484. In a cold chamber die casting machine, only non-ferrous alloys with __________ are casted.
75485. A mortise gauge is a
75486. The casting method adopted for ornaments and toys of non-ferrous alloys, is
75487. In a cold chamber die casting machine
75488. Structural sections such as rails, angles, I-beams are made by
75489. The minimum size of a billet is 10 cm x 10 cm.
75490. In welding magnesium with TIG arc welding, direct current with __________ is used.
75491. Cutting and forming operations can be performed in a single operation in a
75492. The teeth of hacksaw blade are bent
75493. In a cold chamber die casting machine, a measured quantity of molten metal is brought in a ladle from the melting pot to a chamber and forced into the closed die-section by applying hydraulic pressure upon the plunger.
75494. For cutting brass, the hacksaw blade should have __________ teeth per 25 mm.
75495. A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
75496. The cold chisels are made from
75497. To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
75498. A ring gauge is used to
75499. A casting defect which results in general enlargement of a casting is known as