The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.
1、The rate of fuel injection in a diesel
The rate of fuel injection in a diesel engine cylinder depends primarily on （）.Athe size of the holes in the fuel nozzleBtiming of the pumpCsupply pressure to the pumpDshape of the combustion chamber
2、In the operation of a flash type evapo
In the operation of a flash type evaporator equipped with air ejectors,the air and non- condensable gases are evacuated directly from the （）....
3、（） operates at a transfer rate of up t
（） operates at a transfer rate of up to 9600 bits per second and is telephone，telex and facsimile（fax）capable.AINMARSAT ABINMARSAT CCSafetyNETDNAVTEX
4、The discharge rate or capacity of a ce
The discharge rate or capacity of a centrifugal pump will vary directly as the （）.Achange in the impeller diameterBsquare of the impeller radiusCcube of the impeller diameterDimpeller efficiency for large changes in its size
5、The rate of heat transfer in a water-t
The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.Aoperating the boiler at less than normal water levelBinsta...
The operations of a telegraphic transfer is just the same as the mail transfer.A正确B错误