CWB LEVEL 2 UPDATED EXAMS TEST PAPER QUESTIONS AND ANSWERS SURE A.pdf

CWB LEVEL 2 UPDATED EXAMS TEST PAPER
QUESTIONS AND ANSWERS SURE A+
✔✔What is the typical max. OCV of an AC welding machine? - ✔✔80 V

✔✔In an isometric drawing, the lines (for width, length and depth) are inclined at an
angle of how many degrees? - ✔✔30°

✔✔What are the maximum number of views in an orthographic drawing? - ✔✔6

✔✔What are the two general classes of picture drawings? - ✔✔Perspective and
Isometric

✔✔What are the 5 basic joints? - ✔✔1) Butt
2) Corner
3) T
4) Lap
5) Edge

✔✔What are the 5 basic weld types? - ✔✔1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge

,✔✔Plasma cutting torch temp can reach temperatures of __________ ° Celsius. -
✔✔30,000

✔✔True or False: All plasma arc cutting equipment is operated using DCEN. - ✔✔True

✔✔True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process.
- ✔✔False

✔✔What are the two basic methods of plasma torch operation? - ✔✔Transferred and
Non-Transferred arc

✔✔In North America, the 3 othographic views most commonly-used are: TOP, FRONT
and __________ Side.

[RIGHT / LEFT] - ✔✔LEFT

✔✔What is the difference between a "weld symbol" and a "welding symbol"? - ✔✔A
"weld symbol" indicates the specific kind of weld to be used (ex. fillet), and is contained
inside of "welding symbol".

✔✔In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet
weld symbol? - ✔✔LEFT

✔✔In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the
fillet weld symbol? - ✔✔RIGHT

✔✔In what direction do the electrons flow in an electrical arc?

(A) anode --> cathode
(B) cathode --> anode - ✔✔(B) cathode --> anode

✔✔In arc welding, the arc temperature can exceed temperatures of __________ °
Celsius? - ✔✔30,000

✔✔Which welding process has the highest arc efficiency? - ✔✔SAW

✔✔Arc voltage __________ when arc length is increased.

[Increased / Decreased] - ✔✔Increases

✔✔In GTAW, what type of penetration and weld width can be expected when using
DCEP? - ✔✔Shallow penetration, and wide weld

, ✔✔Which polarity is most often chosen for direct current GTAW welding of steels and
why? - ✔✔DCEN. More heat concentrated at the workpiece --> deeper penetration

✔✔Does SMAW use CC or CV? - ✔✔CC

✔✔For out-of-position welding, would you select a small or large diameter electrode? -
✔✔A small diameter electrode

✔✔Does GMAW use CC or CV? - ✔✔CV

✔✔What happens to the SAW weld when you switch from DCEP to DCEN? -
✔✔Increased deposition rate, but less penetration

✔✔What is the temperature for storing low-hydrogen electrodes? - ✔✔120° Celsius

✔✔When using a consumable electrode in DCEN, the majority of the heat is
concentrated on the __________.

(A) Electrode
(B) Workpiece - ✔✔(A) Electrode

✔✔When using a non-consumable electrode in DCEN, the majority of the heat is
concentrated on the __________.

(A) Electrode
(B) Workpiece - ✔✔(B) Workpiece

✔✔Which has a "drooping" curve characteristic - CC or CV? - ✔✔CC

✔✔AC transformer welding power sources use a:

(A) step-up transformer
(B) step-down transformer - ✔✔(B) Step-down transformer

✔✔What is a diode used for in a welding machine?

(A) To produce AC current
(B) To produce DC current - ✔✔(B) To produce DC current

✔✔The typical duty cycle for a Class 1 industrial welding power source is:

(A) 20%