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

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

   A. Thumbwheel switch

   B. Rotary selector switch

   C. Crossbar switch

   D. Toggle switch

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

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

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

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