What is NOT the duties will a technician perform?
A: Maintaining the jumper cables.
B: Inspecting traction motors.
C: Checking the train's power supply for efficiency.
D: Starting the locomotives.
A: Maintaining the jumper cables.
B: Inspecting traction motors.
C: Checking the train's power supply for efficiency.
D: Starting the locomotives.
举一反三
- The main factors which affect the pressure wave when two high-speed trains meet: A: The speed of the meeting trains B: The streamline degree of train C: Line spacing D: Train marshalling form E: Train power distribution form F: Train traction power supply mode
- When replacing a power supply， what MUST the technician observe？（） A: voltage B: current C: wattage D: resistance
- A technician receives a computer for repair and observes that the fan on the power supply is not moving. Which of the following should the technician do？ （） A: Move the power supply voltage switch to 220 volts. B: Add an additional fan to help cool the computer. C: Replace the cable that attaches the power supply to the motherboard. D: Replace the power supply.
- What duties does a receptionist perform?
- After about 2000 hours’ running, we’ll do the following<br/>procedures except(). A: Inspecting the starting and safety valve. B: Cleaning the scavenging and exhaust ports.. C: Inspecting the ring piston blower. D: Checking the crankshaft and its alignment in the bearings.