11-06-2018, 11:56 PM

Solved question paper of UPSC conducted IES/ ESE Engineering Services Preliminary examination 2018 for EE- Electrical Engineering.

Some Model Questions from the ESE 2018 EE Paper

1. In a sample of 100 students, the mean of the marks (only integers) obtained by them in a test is 14 with its standard deviation of 2.5 (marks obtained can be fitted with a normal distribution). The percentage of students scoring 16 marks is

(a) 36 (b) 23

© 12 (d) 10

(Area under standard normal curve between z = 0 and z= 0.6 is 0.2257; and between z = 0 and z = 1.0 is 0.3413)

2. In Face-Centered Cubic structure (FCC), what number of atoms is present in each unit cell?

(a) 18

(b) 16

© 14

(d) 12

3. When an alternating voltage of a given frequency is applied to a dielectric material, dissipation of energy occurs due to

1. Continual change in the orbital paths of the electrons in the atomic structure.

2. A small conduction current through the dielectric.

3. Eddy currents.

Which of the above statements are correct?

(a) 1,2 and 3 (b) 1 and 2 only

© 1 and 3 only (d) 2 and 3 only

4. In a circuit-breaker, the arc is produced due to

1. Thermal emission

2. High temperature of air

3. Field emission

Which of the above statements are correct?

(a) 1,2 and 3

(b) 2 and 3 only

© 1 and 2 only

(d) 1 and 3 only

5. At what power factor will a lossless line with a reactance of 0.6 pu exhibit zero regulation given that the sending end voltage is 1.0 pu?

(a) 0.800 lag (b) 0.800 lead

© 0.954 lead (d) Unity p.f.

For Complete question paper and solutions download the pdf files given below.

Some Model Questions from the ESE 2018 EE Paper

1. In a sample of 100 students, the mean of the marks (only integers) obtained by them in a test is 14 with its standard deviation of 2.5 (marks obtained can be fitted with a normal distribution). The percentage of students scoring 16 marks is

(a) 36 (b) 23

© 12 (d) 10

(Area under standard normal curve between z = 0 and z= 0.6 is 0.2257; and between z = 0 and z = 1.0 is 0.3413)

2. In Face-Centered Cubic structure (FCC), what number of atoms is present in each unit cell?

(a) 18

(b) 16

© 14

(d) 12

3. When an alternating voltage of a given frequency is applied to a dielectric material, dissipation of energy occurs due to

1. Continual change in the orbital paths of the electrons in the atomic structure.

2. A small conduction current through the dielectric.

3. Eddy currents.

Which of the above statements are correct?

(a) 1,2 and 3 (b) 1 and 2 only

© 1 and 3 only (d) 2 and 3 only

4. In a circuit-breaker, the arc is produced due to

1. Thermal emission

2. High temperature of air

3. Field emission

Which of the above statements are correct?

(a) 1,2 and 3

(b) 2 and 3 only

© 1 and 2 only

(d) 1 and 3 only

5. At what power factor will a lossless line with a reactance of 0.6 pu exhibit zero regulation given that the sending end voltage is 1.0 pu?

(a) 0.800 lag (b) 0.800 lead

© 0.954 lead (d) Unity p.f.

For Complete question paper and solutions download the pdf files given below.