Which torch type would be the best choice for a brazing project?

A) Air-fuel torch B) Air-MAPP swirl-tip torch
C) Oxyacetylene torch D) Air-propane swirl-tip torch


C

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it was decided to add five additional channels, ( 6 f , 7 f , 8 f , 9 f , 10 f ) while keeping the frequency hopping sequence to five bands. Is it advisable to maintain frequency hopping within each of the channels ( 1 f , 2 f , 3 f , 4 f , 5 f ) and ( 6 f , 7 f , 8 f , 9 f , 10 f ), or it is better to select five channels among the bands ( 1 f , 2 f , 3 f , 4 f , 5 f , 6 f , 7 f , 8 f , 9 f , 10 f )? Explain your answer with some quantitative measures.

In a hypothetical wireless system, five adjacent frequency bands (1f ,2f 3f ,4f ,5f) are allowed for frequency hopping sequences. Enumerate how many differenthopping sequences are possible and prove their correctness.

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Which of the following can be used to locate both exhaust and vacuum leaks?

A. Propane B. Smoke C. Electronic leak detector D. Cetane

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Why is it possible to vary the output voltage by controlling either the speed of the prime mover or the strength of the magnetic field?

What will be an ideal response?

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The actual height, in inches, of a standard-size brick is 2 1/4". Express the height in inches of twelve bricks stacked one on top of another as a decimal fraction.

What will be an ideal response?

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