MCQs of Grounding & Bonding (Power Quality and Management - 2180911)

Power Quality and Management (2180911) MCQs

MCQs of Grounding & Bonding

Showing 11 to 20 out of 23 Questions

11.

_____________ a conductor or body of conductors in intimate contact with the earth for the purpose of providing a connection with the ground.

(a)	Equipment grounding conductor
(b)	Grounding conductor
(c)	Grounded conductor
(d)	Ground electrode

12.

Which of the following components can not be used as a ground electrode system?

(a)	Metal frame of buildings or structures
(b)	Ground ring
(c)	Concrete-encased electrodes
(d)	A metal underground gas piping system

13.

Choose the correct options. (i) A metal underground gas piping system can be used as a ground electrode. (ii) Aluminum electrode is used as ground electrode.

(a)	only (i)
(b)	only (ii)
(c)	(i) and (ii)
(d)	none of these

14.

Why all possible electrodes with ground systems that are extensive and interconnected?

(a)	To offer low voltage
(b)	To offer low current
(c)	To offer low impedance reference
(d)	To save energy

15.

___________ is used to test the resistance between the ground grid and earth

(a)	Multimeter
(b)	Energymeter
(c)	Earth Resistance Tester
(d)	Megger

16.

Earth resistance depends on

(a)	Type of soil
(b)	Moisture content
(c)	Temperature
(d)	All of these

17.

Earth resistance of __________Ω is adequate for residential and small commercial buildings

(a)	10
(b)	25
(c)	5
(d)	15

18.

For large buildings and facilities that house sensitive loads, a resistance value should be of _____________ Ω.

(a)	10
(b)	15
(c)	5
(d)	20

19.

In typical ground grid systems, the value at a distance ____________% of the total distance between the reference electrode and the current rod is taken as the resistance of the ground system with respect to earth.

(a)	55
(b)	62
(c)	65
(d)	70

20.

In plate earthing, rectangular or circular plates should present an area of at least _____ ft² to the soil.

(a)	2
(b)	1.5
(c)	3
(d)	4

Showing 11 to 20 out of 23 Questions