Welding and NDT Egypt

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ANSWER KEY-MODULE 10

VT Test -  MODULE 10 Q10-1 Which of the following nondestructive testing methods are limited to the detection of surface  discontinuities? a. visual b. penetrant c. radiographic d. a and b above e. b and c above Q10-2 To be most effective, visual inspection should be performed: a. before welding b. during welding c. after welding d. all of the above e. none of the above Q10-3 The time period during which the penetrant remains on the surface of the part allowing it to  be drawn into any surface discontinuities is called: a, waiting time b. penetrating time c. soak time d. dwell time e. none of the above Q10-4 Which type of magnetizing current provides the best iron particle mobility? a. AC b. DC c. DCEP d. b and c above e. all of the above Q10-5 What MT technique could be used for the discovery of longitudinal flaws? a. head shot (circular magnetism) b. side shot c. coil shot (longitudinal magnetization) d. a and b above e. b and c above Q10-6

ANSWER KEY-MODULE 9

VT Test -  MODULE 9 Q9-1 A discontinuity is:  a. always a defect b. always a reject c. always acceptable d.  rejectable if it exceeds code limits e. none of the above Q9-2 Whether a particular weld discontinuity is critical can be judged on the basis of a.  whether it is surface or subsurface. b.  whether it is linear or nonlinear. c.  whether it has a sharp end condition. d. all of the above e. none of the above Q9-3 What discontinuity is generally considered to be the most severe? a. porosity b. incomplete fusion c. slag inclusion d. crack e. arc strike Q9-4 Which of the following discontinuities is less likely to be found visually? a. toe crack b. undercut c. lamellar tear d. overlap e. none of the above Q9-5 Underbead cracks can result from which of the following welding practices? a. use of wet electrodes b. welding on contaminated steels c. welding over paint d. all of the above e. none of the above Q9-6 The weld discontinuity that resu

ANSWER KEY-MODULE 8

VT Test -  MODULE 8 Q8-1 As a metal is heated: a.  energy is added to the structure b.  the atoms move further apart c.  the atoms vibrate more vigorously d. the metal expands e. all of the above Q8-2 The state of matter which exhibits the least amount of energy is: a. solid b. liquid c. gas d. quasi-liquid e. none of the above Q8-3 A problem occurring in weldments caused by the nonuniform heating produced by the welding  operation is: a. porosity b. incomplete fusion c. distortion d. slag inclusions e. none of the above Q8-4 Which of the following is not a method used to eliminate or reduce residual stresses? a. vibratory stress relief b. external restraint c. thermal stress relief d. peening e. annealing Q8-5 The type of alloying in which the alloy atoms are located in the spaces between the atoms of the  parent metal is referred to as: a. atomic alloying b. substitutional alloying c. space alloying d. interstitial alloying e. none of the abo