60 TOP MOST HEATING and WELDING – Electrical Engineering Objective Type Questions and Answers

1.   Which of the following is an advantage of heating by electricity ? (a)     Quicker operation (b)     Higher efficiency (c)    Absence of flue gases (d)    All of the above Ans: d 2.   ________ has the highest value of thermal conductivity. (a) Copper (b) Aluminium (c) Brass (d) Steel Ans: a 3. Which of the following…

70 TOP MOST INDUSTRIAL DRIVERS – Electrical Engineering Objective Type Questions and Answers

1.    The selection of an electric motor for any application depends on which of the following factors ? (a)    Electrical characteristics (b)    Mechanical characteristics (c)    Size and rating of motors (d)    Cost (e)    All of the above Ans: e 2.    For a particular application the type of electric-and control gear are determined by which of…