Unit 18 - Prepare for general electrical installations Quiz 5
  إظهار بيانات الطالب   إظهار التعليمات   تغيير اتجاه الصفحة

رقم السؤال: 1           درجة السؤال: 1
 Ensures there is no under voltage in the system
 Reduces the cost of the installation
  Prevent total loss of all systems in the event of an earth fault occurring on any single plugged in appliance
  Ensures the switchboards are not over loaded
رقم السؤال: 2           درجة السؤال: 1
 5 to 10 mA within 40mS
 30mA at 300mS
 150mA at 40mS
 200mA at 25mS
رقم السؤال: 3           درجة السؤال: 1
 none of these
  HRC/HBC
 cartridge type
  semi-enclosed
رقم السؤال: 4           درجة السؤال: 1
 must be low enough to generate sufficient fault current to operate the circuit protective device within an adequate time
 must be high enough to generate sufficient fault current to operate the circuit protective device within an adequate time
 must be equal to generate sufficient fault current to operate the circuit protective device within an adequate time
 must be critically high enough to generate sufficient fault current to operate the circuit protective device within an adequate time
رقم السؤال: 5           درجة السؤال: 1
 Number of poles
 Types
 Method of mounting
 Value of rated voltage, frequency and current
رقم السؤال: 6           درجة السؤال: 1
 2 to 3 times the rated current
 3 to 5 times the rated current
 5 to 10 times the rated current
 10 to 50 times the rated current
رقم السؤال: 7           درجة السؤال: 1
 PCB
 HRC
 MCB
 RCD
رقم السؤال: 8           درجة السؤال: 1
 A
 B
 C
 D
رقم السؤال: 9           درجة السؤال: 1
 High Blow Capacity
 High Breaking Capability
 High Blow Capability
  High Breaking Capacity
رقم السؤال: 10           درجة السؤال: 1
 the current of the active and associated protective earthing conductor and the route length
 the resistance of the active and associated protective earthing conductors and route length
 the voltage of the active and associated protective earthing conductors and route length
 the reactance of the active and associated protective earthing conductors and route length


   



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