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You Are On Multi Choice Question Bank SET 1469

73451. The type of reamer used for reaming soft aluminium or copper, is

73452. The tool material, for faster machining, should have

73453. The helix angle of a drill is more than 30° for drilling aluminium.

73454. In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become

73455. An open structure of a grinding wheel is used for

73456. A twist drill is specified by its

73457. The hole to be drilled for tapping is __________ the outside diameter of the thread on the tap.

73458. Glazing in grinding wheels takes place when the

73459. Low helix angle drills are preferred for drilling holes in

73460. In which of the following machine, the work remains stationary and the tool is rotated?

73461. The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is

73462. The cutting speed of a drill depends upon the

73463. The part of the tool on which cutting edge is formed is called nose.

73464. The chamfering is an essential operation after

73465. The broaching operation in which either the work or the tool moves across the other, is known as

73466. Ultra-sonic machining is best suited for

73467. In plunge grinding

73468. When the grinding wheel is marked by the letters from I to P, it indicates that the grinding wheel is of hard grade.

73469. A 15 mm drilling machine means that it can drill a hole

73470. The tap used to cut threads in a blind hole is

73471. A jig is defined as a device which

73472. A mandrel is used to hold

73473. Jigs are used

73474. The swing diameter over carriage is always less than the swing diameter over bed.

73475. The size of abrasive grain required in a grinding wheel depends upon the

73476. A grinding wheel is said to be of __________ if it holds the abrasive grains more securely.

73477. A dense structure of a grinding wheel is used for

73478. The keyways, grooves and slots cannot be cut on a shaper.

73479. Side relief angle of a single point tool is the angle

73480. Gears can be best produced on mass production by

73481. In a plain milling machine, the table can be moved

73482. In drilling operation, the metal is removed by

73483. A single point tool has

73484. In hot machining, the work is heated by

73485. The type of tool used on milling machine and broaching machine is

73486. Which of the following statement is correct for oblique cutting system?

73487. When the tool moves parallel to the lathe axis, the movement is termed as

73488. In the relation VTn = C, the value of n for ceramic tools is

73489. Chip breakers are used to

73490. The factor responsible for the formation of discontinuous chips is

73491. The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is

73492. The actual feed in centreless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)

73493. For fast removal of materials during grinding, a __________ grinding wheel is used.

73494. Which of the following process is used for preparing parts having large curved surfaces and thin sections?

73495. A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to

73496. To grind brittle materials, a coarse grained grinding wheel is used.

73497. Gears can be cut on a shaper.

73498. The grade of grinding wheel depends upon

73499. A dynamometer is a device used for the measurement of

73500. A broach has

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