1. What is the meaning of HAZ ?
(i) Heat around Zone.
(ii) Heat alongwith Zone
(iii) Heat affected Zone*
(iv) Heat added zero.
Answer - (iii) Heat affected Zone*
2. If code of a fracture is OFW-422 then it means.
(i) AT welding with transverse crack.
(ii) Flash butt welding with transverse crack.
(iii) At welding with horizontal crack.*
(iv) None of the above.
Answer -(iii) At welding with horizontal crack.*
3 450 probe is used for detecting defect in;
(i) FB weld
(ii) AT weld
(iii) FB weld, AT weld & SEJ
(iv) All above*
4 By 00 probe in AT weld testing with normal gain setting.
(i) Area below N.axis can be tested.
(ii) Area below N.axis can not be tested.*
(iii) Only web below N.axis can be tested.
(iv) All above are correct.
Answer -(ii) Area below N.axis can not be tested.*
5 Tandem rig test with 450 probe for AT weld detects.
(i) Horizontal longitudinal defect in weld.
(ii) Vertical oriented defect in AT weld.*
(iii) Transverse defect in AT weld.
(iv) Defect in flange of AT welds.
Answer -(ii) Vertical oriented defect in AT weld.*
6 Total no. of probes fitted on digital double rail tester for rail testing are
(i) 12
(ii) 8
(iii) 14*
(iv) 16.
Answer - (iii) 14*
7 If digital DRT is calibrated for 300 mm longitudinal wave using 00 double crystal probe then 60kg rail ---------peak will appear at
(i) 5.2
(ii) 5.7*
(iii) 7.8
(iv) 8.6
Answer -(ii) 5.7*
8 Addition gain of 10 db is used for testing.
(i) ‘D’ marked rails on single lines.
(ii) ‘D’ marked rails on double lines.
(iii) Testing on single line and ‘D’ marked rails on double/multiple lines section.*
(iv) None of above.
Answer -(iii) Testing on single line and ‘D’ marked rails on double/multiple lines section.*
9. The increased gain of 10 dbs for single line & ‘D’ marks rails on double/multiple lines shall be employed for classification of defects.
(i) defect in weld
(ii) defects in rail. *
(iii) for both defects on weld & rail.
(iv) None of above.
Answer -(ii) defects in rail. *
10. On Rajdhani routes testing frequency of rail testing for rail section of 60kg with annual GMT 80, will be.
(i) 4 months
(ii) 1 ½ months
(iii) 1 months*
(iv) None of above.
Answer -(iii) 1 months*
11. Sensitivity calibration against temp. variation shall be carried out.
(i) At least once in month*
(ii) quarterly.
(iii) at least once in six months
(iv) Any of above.
Answer - Answer -(iii) 1 months*
12 The gap between probing face and probing shoe should be.
(i) 0.4 mm
(ii) 0.2mm *
(iii) 3mm
(iv) 1mm.
Answer - (ii) 0.2mm *
13 For rolling mark 60 kg/Sail/X/2010 the first testing in the field after initial testing of rails in rail manufacturing plant, will be done.
(i) After test free period of 25%.
(ii) After passage of every 40 GMT traffic during test free period.*
(iii) After passage of 200 GMT.
(iv) On the basis of annual GMT of the section.
Answer -(ii) After passage of every 40 GMT traffic during test free period.*
14 Side looking 700 2MHZ probe is tested for detecting.
(i) Flaw in head
(ii) Flaw in web
(iii) Half moon crack in flange.*
(iv) For all above.
Answer - (iii) Half moon crack in flange.*
16 Marking of DFWO weld is.
(i) Two red point circle on both faces of weld.*
(ii) Two red point cross on both faces of weld.
(iii) One red point circle on both faces of weld.
(iv) None of the above.
Answer -(i) Two red point circle on both faces of weld.*
17 DFWR weld shall be replaced.
(i) Within 2 months of detection.
(ii) Within 1 year of detection.
(iii) Within 3 months of detection.*
(iv) after 3 days of detection.
Answer -(iii) Within 3 months of detection.*
18 On a branch line one new AT Weld with 00 probe shows a signal of 58 is.
(i) DFWO*
(ii) DFWR
(iii) IMRW
(iv) OBSW
Answer -(i) DFWO*
19 During periodic testing of an AT weld with 700 probe, a bunch of moving signals of less than 40% but more than 10% is observed in the head of weld, the joint will be.
(i) Good joint.*
(ii) DFWR
(iii) DFWO
(iv) OBSW
Answer - (i) Good joint.*
20 The frequency of a wave travelling at a speed of 500 ms-1 is 25 Hz. Its time period will be ______. (i)20 s
(ii)0.05 s
(iii)25 s
(iv)0.04 s
Answer -(iv)0.04 s
21 The amplitude of a wave is ______.
(i) the distance the wave moves in one second
(ii).the distance the wave moves in one time period of the wave
(iii)the maximum distance moved by the medium particles on either side of the mean position*
(iv)the distance equal to one wave length
Answer - (iii)the maximum distance moved by the medium particles on either side of the mean position*
22 The physical quantity, which oscillates in most waves, is
(i)mass
(ii)energy
(iii)Amplitude*
(iv)wavelength
Answer -(iii)Amplitude*
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