Switch Multiple Choice Questions and Answers


21.  The contact resistance of a manually operated switch is


   A. Zero

   B. Very high

   C. Very low

   D. None of the above


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C. Very low

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22.  Which one of these is not a manually operated switch?


   A. Thumbwheel switch

   B. Rotary selector switch

   C. Crossbar switch

   D. Toggle switch


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C. Crossbar switch

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23.  A switch should have


   A. High insulation resistance

   B. Low insulation resistance

   C. Insulation resistance equal to contact resistance

   D. None of the above


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A. High insulation resistance

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24.  A Thumbwheel switch


   A. Has an operating wheel which has numbers on it

   B. Is an alternative form of rotary switch

   C. Requires half the operating torque required in a rotary switch

   D. Supports the features A, B and C


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D. Supports the features A, B and C

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25.  When a membrane key switch is pressed


   A. The row conductor sheet gets separated from the column contact conductor sheet

   B. The row conductor sheet comes into contact with column conductor sheet

   C. A plunger exerts a pressure on the carbon button and it touches the contact print on the circuit board

   D. None of the above


✔ View Answer


B. The row conductor sheet comes into contact with column conductor sheet

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