Cwb Level 2 Theory Quiz 1 Latest Update -

Cwb Level 2 Theory Quiz #1 Latest Update - Questions and 100% Verified Correct Answers

Questions and Answers

• 1.

Stress cracking is most likely to occur when welding thick

material. This is due to:

• A.

Undercutting and nicking

• B.

Decreased cooling effect

• C.

Hydrogen embrittlement

• D.

Increased cooling effect Correct Answer

• Increased cooling effect

Explanation Stress cracking is most likely to occur when welding thick material because of the increased cooling effect. When thick material is welded, it takes longer for the heat to dissipate, causing the weld to cool at a slower rate. This slower cooling can lead to the formation of residual stresses in the material, which can result in stress cracking.

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• 2.

In producing a drawing for a scale of 1:20, what would the

distance represented by a distance on the drawing of 6 inches be:

• A.

120 feet

• B.

12 inches

• C.

12 feet

• D.

120 inches Correct Answer

• 120 inches

Explanation

In a scale of 1:20, it means that every inch on the drawing represents 20

inches in real life. Therefore, if a distance of 6 inches is represented on the drawing, the actual distance it represents would be 6 inches multiplied by 20, which equals 120 inches.

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• 3.

The best form of distortion control when placing fillet welds on a

long T-joint is:

• A.

Rigid clamping 2 / 4

• B.

Welding sequence

• C.

Sub assembly

• D.

Prebending or setting Correct Answer

• Welding sequence

Explanation The correct answer is "Welding sequence." When placing fillet welds on a long T-joint, the welding sequence refers to the order in which the welds are made. This is important because it helps to minimize distortion and warping of the joint. By starting at one end and gradually moving towards the other end, the heat input is evenly distributed, allowing for better control of the welding process and reducing the chances of distortion.

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• 4.

If the current is a flow of electrons they move in what direction:

• A.

From positive to negative

• B.

From negative to positive

• 3 / 4

They alternate each half cycle

• D.

They flow on positive side of neutral line Correct Answer

• From negative to positive

Explanation The flow of electrons in a current is from negative to positive. This is because electrons, which carry a negative charge, are attracted to the positive terminal of a power source. Therefore, they move towards the positive terminal, creating an electric current. This is the opposite direction of conventional current, which assumes the flow of positive charges from positive to negative.

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• 5.

The type of power source with a drooping volt-amp characteristic

is:

• A.

C.A.V.

• B.

C.C.

• C.

C.P.

• D.

C.V.

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