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单选题 无功电能的单位是( ). The unit of reactive electric energy is ( )
学科：电能计量（第5期）（装表接电）Electric energy metering
时间：2023-05-25 05:09:20
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题目1单选题
某用户一个月有功电能为2000kWh,平均功率因数cosΦ=0.8,则其无功电能为( )千乏时. The monthly active electric energy of a user is 2000 kWh, and the average power factor is cos Φ= 0.8, the reactive electric energy is ( ) kilovarA. 1500B. 1600C. 2000D. 2500
题目2单选题
某感应式电能表上月示数为9297.65kWh,本月示数为0033.09kWh,故本月用电量为( )kWh. The reading of an inductive electricity meter last month is 9297.65kWh, and the reading of this month is 0033.09kWh, so the electricity consumption of this month is ( ) kWhA. 33.09B. 735.44C. 9264.56D. 9330.74
题目3单选题
电能表铭牌上标明的电能表常数为1600imp/kWh,若脉冲灯闪烁500次,则使用了( )kWh的电能. The constant of the electric energy meter indicated on the nameplate of the electric energy meter is 1600mp/kWh. If the pulse lamp flashes 500 times, ( ) kWh is usedA. 0.31B. 8.00C. 1.6D. 3.2
题目4单选题
单相电能表的第1、2号孔之间的电压值为( )伏. The voltage value between holes 1 and 2 of single-phase watt hour meter is ( ) VA. 接近0 near 0B. 100C. 220D. 380
题目5单选题
低压三相四线电能表,2-10号孔之间的电压是( )伏. The voltage between holes 2-10 of low-voltage three-phase four wire watt hour meter is ( ) VA. 0B. 220C. 380D. 由负荷大小确定 Determined by load size
题目6单选题
三相电能表显示屏上的Ua闪动,说明( ). Ua on the display screen of three-phase electric energy meter flashes, indicating ( )A. A相电压短路 Phase A voltage short circuitB. A相电压断线 Phase A voltage disconnectionC. A相电流短路 Phase A current short circuitD. A相电流开路 Open circuit of phase A current
题目7单选题
如果单相电能表的1、2号端子被短接,其结果是( ). If terminals 1 and 2 of single-phase watt hour meter are shorted, the result is ( )A. 电源跳闸 Power tripB. 电能表短路烧毁 Electric energy meter is burnt due to short circuitC. 多计电量 Overcounting quantity of electricityD. 少计电量 Undercount quantity of electricity
题目8单选题
无功电能的单位是( ). The unit of reactive electric energy is ( )A. kWhB. kMhC. kVAhD. kvarh
题目9单选题
电能表的电压元件和电流元件,分别( )在电路中. The voltage element and current element of the watt hour meter are respectively ( ) in the circuitA. 串联和串联 series connection and series connectionB. 并联和并联 parallel connection and parallel connectionC. 串联和并联 series connection and parallel connectionD. 并联和串联 parallel connection and series connection
题目10单选题
规程规定,电能表的安装高度应在( )米. According to the regulations, the installation height of the electric energy meter shall be ( ) metersA. 1~2B. 0.5~1C. 0.8~1D. 0.8~1.8
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