HAL Placement Paper Technical - Other Hyderabad-25 Nov 2006
HAL PAPER ON 26th NOVEMBER AT HYDERABAD
Hai friends,, Here are the some of the technical questions posed in the HAL exam for the post of Management/Design Trainee on 26-11-2006 for electrical branch.
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
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
Regards, Prashanth Tirungari
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