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Control System Components mcq

  Control System Components Industrial Control Devices: Switches 1.The contact resistance of a manually operated switch is    A. Zero    B. Very high    C. Very low    D. None of the above Answer: Very low   2. Which one of these is not a manually operated switch?    A. Thumbwheel switch    B. Rotary selector switch    C. Crossbar switch    D. Toggle switch Answer: Crossbar switch   3. A switch should have    A. High insulation resistance    B. Low insulation resistance    C. Insulation resistance equal to contact resistance    D. None of the above Answer: High insulation resistance 4. 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 Answer: Supports the features A, B and C 5.  When a membrane key switch is pressed    A. The row conductor sheet gets separated from the column contact conductor sheet    B. The ro

Control System Components Question and Answers

  Control System Components Industrial Control Devices: Switches 1.The contact resistance of a manually operated switch is    A. Zero    B. Very high    C. Very low    D. None of the above Answer: Very low   2. Which one of these is not a manually operated switch?    A. Thumbwheel switch    B. Rotary selector switch    C. Crossbar switch    D. Toggle switch Answer: Crossbar switch   3. A switch should have    A. High insulation resistance    B. Low insulation resistance    C. Insulation resistance equal to contact resistance    D. None of the above Answer: High insulation resistance 4. 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 Answer: Supports the features A, B and C 5.  When a membrane key switch is pressed    A. The row conductor sheet gets separated from the column contact conductor sheet    B. The ro