21.

22.

23.

24.

25.

26.

27.

Sudden quenching for heat treatment, which medium is suitable?

(A) Caustic soda in water (B) Oil
(C) Blast of Air (D) Sand
Which carburizing process is rapid?
(A) Pack carburizing (3) Box carburizing
(C) Gas carburising (D) Salt bath carburizing
The process of raising a strip of metal around the end of a round pipe is known as:
(A) Crimping (B) Forming
(C) Embossing (D) Beading

Which among the following statement is/are correct about a conical rivet?
@ Generally used in light assembly
(11) It isa solid rivet
(111) Generally used in heavy structural work
(iv) Rivet gun is necessary for rivetting
(^) Only (@) and (iv) (B) Only (i) and (ii)
(C) Only 61) ೩೧4 (1) (0) Only (iv)

Which among the following statement is/are not correct about polarity in arc welding?
@ When the electrode cable is connected to the negative terminal it is called reverse

polarity
(i) When the electrode cable is connected to the positive terminal it is called reverse
polarity
(iii) When the electrode cable is connected to the negative terminal it is called straight
polarity
(iv) The polarity of a machine refers to the direction of current flow
(A) _ only (i) (B) | only (iii)
(೮) only(@i) and (111) (D) _ only (ii) and (iv)
Which Grade slip gauge is used for inspection purpose?
(^) Grade ‘00’ accuracy (B) Grade T’ accuracy
(C) Grade ‘0’ accuracy (D) Grade 11 accuracy

Which among the following statement is/are correct about woodruff key?
൫ ‘This isa parallel key with rounded ends
Gi) For fitting this key in the assembly a flat surface is machined on the shaft
(ii) The top portion of the key projects out and fits in the key way cut on the hub
(iv) This key is particularly usefull on tapered fittings on the shafts

(^) Only (61) ೩೧೮ (1) ൯ Only @ and (ii)

(C) Only (i) (D) Only (ii)

5 014/2024
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