# Test: Switch Gear & Protection of Power Systems

## 10 Questions MCQ Test GATE Electrical Engineering (EE) 2023 Mock Test Series | Test: Switch Gear & Protection of Power Systems

Description
Attempt Test: Switch Gear & Protection of Power Systems | 10 questions in 30 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study GATE Electrical Engineering (EE) 2023 Mock Test Series for Electrical Engineering (EE) Exam | Download free PDF with solutions
QUESTION: 1

### For an arcing fault where the arc resistance is significant an impedance or admittance relay will

Solution:

The reach of a reactance relay is unaffected due to the arc resistance while an impedance and admittance relay under reaches.

QUESTION: 2

Solution:
QUESTION: 3

### There is a problem of high transient over voltages while interrupting

Solution:

High transient over voltages occurs in power system due to formation of capacitance across the breaker poles. These are also called switching over voltages.

QUESTION: 4

The most suitable circuit breaker for voltages above 220 kV is

Solution:
QUESTION: 5

Match List-I with List-ll and select the correct answer using the codes given below the lists:
List-I
A. Mho relay
B. Reactance relay
C. Simple impedance relay
List-ll
1. Voltage restrained OC relay
2. Direction restrained OC relay
3. Voltage restrained directional relay

Solution:
QUESTION: 6

Pilot relaying schemes are used for protection of

Solution:

Pilot relaying schemes provide high speed protection for transmission lines.

QUESTION: 7

Relays A and B have to be coordinated on two adjacent line sections as shown in figure below. Zone-1 and Zone-2 settings are indicated on the diagram.

Which of the following indicates correct time setting for zone-2 of relays A and B?

Solution:
QUESTION: 8

Identify the relays to be provided with directional and non-directional elements in the system shown in figure below.

Solution:
QUESTION: 9

If the fault current is 2000 A, the.relay setting 50% and the CT ratio is 400/5, then the plug setting multiplier will be

Solution:

Relay operating current,

QUESTION: 10

The percent bias for a generator protection lies between

Solution:
 Use Code STAYHOME200 and get INR 200 additional OFF Use Coupon Code