Hello , here I am providing you sample paper of hal assistance engineer post hope so this may help you ….
Exam pattern :
Total questions asked in exam is 160

Questions are divided into sections as follows...
General Engineering - 25 questions.
General Awareness - 15 questions.
Specific Discipline - 120 questions.

Each question carries 1 mark each and there is no negative marking...

Sample paper:-
1) What is the distance between the EHV lines?
a)8m b)11m c)4m d)14m

2) At present how many HVDC lines are there in india?
a)none b)one c)two d)more than two

3) Where is the nuclear located in following places?
ans: i dont remember the answers, but one of them is thalcher(orissa)

4) What is the approximate peak overshoot for a unity feedback system with damping
factor 0.6?
a)10% b)5% c)15% d)20%

5) What is the distance between the EHV lines and earth?
a)8m b)11m c)18m d)15m

6) On no load in EHV lines what is the relation between receinving and sending end
voltage?
ans: receiving end voltage > sending end voltage

7) What is the surge impedance loading of 400kv line?
ans: 4002/400ohms =400watts

8) similar question with surge impedance given as 160 ohms
ans: 1000watts

9) If both the juctions of transistor are forward biased, in wat region transistor works
ans: saturation region

10) Where is the hydel power plant located in following places?
ans: I dont remember the places

11) self GMD is used in the calculation of_______
a) inductance only
b) inductance and capacitance
c) capacitance only
d) none

12) What is the GMD if the distance between the lines are 6m,6m,12m?
ans: 7.058m( approx)

13) Zero sequence currents doesn’t exist in the following fault
a) L-G
b) L-L
c) L-L-G
d) L-L-L-G
Ans: d

14) To avoid arcing connect sutable value of ________ in earthing.
a) capacitance
b) indunctance
c) resistance
d) susceptance

15)There are two to three questions based on Laplace and Inverse Laplace transforms

16)In the following type of conductors the corona is minimum
a) circular
b) stranded
c) helical
d) rectamgular
ans: c

17)When do two wattmeters show same value of opposite readings in two wattmeter
method
a) 300 lag
b) 600 lag
c) between 600 and 900 lag
d) zpf lag
ans: d

18) Schering bridge is used to measure
a) frequency
b) inductance
c) capacitance
d) mutual inductance
and: c

19) What is the value of resistance when both length and diameter of the wire are
doubled?
ans: halved

20) There is one questions asked on euler’s formula..

21) What is the Laplace transform of unit ramp signal?
ans:1/s2

22) What happens to the value of inductance when self GMD is doubled?

23) At what frequency corona loss is more?
a) 50Hz
b) 60Hz
c)
d)

24) What is the largest rating of alternator manufactured in india?
a) 1000MW
b) 500MW
c) 1200MW
d) 250MW
ans:b

25) The response of an RLC circuit for impuse input?
a) exponentially raising
b) sinusoidal
c) exponential falling
d) parabolic
ans: c

26) What is the easier method for finding no. of poles in the right half of s-plane?
a) Niquist plot
b) R-H criterion
c) Root-Locus method
d) Polor plot
ans: b

27) How many no of poles located in the right half of s-plane for the characteristic
equation…

28) Burden of current transformers is measured in..
a) Watts
b) Volt Amperes
c) Ampere Hours
d) Joules

29)What is the gate used to get high output when all the inputs are low?
a) NOR
b) NAND
c) Ex-OR
d) Ex-NOR
ans: b

30) Large no of thyristors are used in HVDC transmission to improve______
a) current rating
b) voltage rating
c) Thyristers are available at high ratings

31) What is the line current of a circuit when the current transformer of 1000:5 rating
measures 4Amperes?
ans: 800A