block signal
A: a fixed signal that lets engineers know if a train can enter a block.
B: a conductive connector used to maintain circuit continuity for track circuits and electrified tracks.
A: a fixed signal that lets engineers know if a train can enter a block.
B: a conductive connector used to maintain circuit continuity for track circuits and electrified tracks.
A
举一反三
- manual block A: block controlled manually by a person known as a block operator. B: a fixed signal that lets engineers know if a train can enter a block.
- a fixed signal that lets engineers know if a train can enter a block. A: ABS (automatic block system) B: lock C: lock signal
- The Switch block in the Signal Routing block library can be used to implement a piecewise function.
- Track circuits detect__1__if a train is occupying a block.
- Which of the following circuits is used to eliminate a portion of a signal? （ ）.
内容
- 0
_____, the train started. A: The signal given B: Giving the signal C: The signal being given D: The signal giving
- 1
Verbs can never be used as signal words of time.
- 2
Which of the following circuits is used to eliminate a portion of a signal? （ ）. A: Voltage multiplier B: Voltage divider C: Clipper D: Damper
- 3
________, the train started. A: The signal given B: After the signal was given C: Given the signal D: A and B
- 4
A snatch block is a（）. A: block used only with manila rope B: chock roller C: hinged block D: strong block used for short，sharp pull