Which of the following should not be done by a good mechanic?

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APut sharp edged tools in the pocket

BWipe excess oil and grease off the hands and tools

CAlways keep the workshop floor clean

DWear safety goggles while grinding

Answer:

Related Questions:

Which of the following statements are correct?

(a). For a lens the first principal focus is the position of the object whose image is at infinity
(b) For a lens the first principal focus is the position of the object whose image is formed at twice the focal length.
(c) For a lens the second principal focus is the position of the real image whose object is at infinity
(d) For a lens the second principal focus is the position of the object whose image is formed at twice the focal length