TS ECET EEE 2020-5

1. which of the following has highest calorific value?

A. Lignite
B. Anthracite coal
C. Bituminus coal
D. Magnite

Answer : B. Anthracite coal
Explanation:-

2. Which of the following statement is False?

A. A surge tank protects the penstock from bursting in case the turbine gets suddenly closed
B. A steam power station basically works on the Rankine cycle
C. The thermal efficiency of a modern steam power station is abot 70%
D. A condensor is a device which condenses the steam at the exhaust of turbine

Answer : C. The thermal efficiency of a modern steam power station is abot 70%
Explanation:-

3. What is the electrical energy generated per hour per cubic metre of water from a reservoir with a head of 100 metres in case of hydro electric station with overall efficiency of 79% ?

A. 500 kwh
B. 1000 kwh
C. 775 kwh
D. 675 kwh

Answer : C. 775 kwh
Explanation:-

4. Absorption of solar radiation at earth's surface occurs due to presence of

A. Ozone
B. carbon
C. sulphur
D. Nitrogen

Answer : A. Ozone
Explanation:-

5. A wind is blowing at a velocity V through an area A at right angle to it. The density of wind is ρ . The kinetic energy of the wind is ________

A. ρAV^2
B. ρAV^3
C. (0.5ρV^3)/A
D. 0.5*ρ*A*V^2

Answer : 0.5*ρ*A*V^2
Explanation:-

6. A generating station is to supply four loads whose peak loads are 12MW, 7MW, 11MW and 15MW. The diversity factor of the station is 1.5 what is the maximum demand on the station?

A. 45 MW
B. 30 MW
C. 15 MW
D. 20 MW

Answer : B. 30 MW
Explanation:-

7. Match the following?

Group 1	Group 2
P. Backup protection	A. used on AC circuits
Q. Buchholz relay	B. Non unit type
R. Resistance switching	C. Air blast circuit breakers
S. induction type over current relay	D. Oil circuit breakers
	E. Gas operated relay

Choose the correct option from the following

A. P-B, Q-E, R-C, S-A
B. P-A, Q-B, R-D, S-A
C. P-B, Q-E, R-D, S-A
D. P-D, Q-C, R-A, S-B

Answer : P-B, Q-E, R-C, S-A
Explanation:-

8. Which of the following material is used for making the fuse element to carry small current upto 10A?

A. Copper only
B. silver only
C. copper and silver
D. An alloy of lead and tin

Answer : D. An alloy of lead and tin
Explanation:-

9. which of the following lightning arrestor is called protector tube?

A. Rod gap type
B. Horn gap type
C. valve type
D. Expulsion type

Answer : D. Expulsion type
Explanation:-

10. In percentage differential protection relay. the differential current through the operating coil is x amps and the average current in restraining coil is y amps. The ratio of number of turns of operating coil to restraining coil under balanced conditions is

A. y/x
B. x/y
C. 2x/y
D. 2y/x

Answer : A. y/x
Explanation:-