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...

  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...