The previous year question Paper for the BSNL JTO recruitment examination as you require it for reference purpose is as given below:

Q.1 A house served by a 220V supply light, is protected by a Q.1
9-Ampere fuse. The maximum number of 60 W bulbs in parallel
that can be turned on is
(a) 11 (b) 33
(c) 22 (d) 44

Q.2 An n-channel JFET has I Q.2 DSS = 1 μA & VP =–5V. The maximum
transconductance is
(a) gm = 0.4 milli mho (b) gm = 0.04milli mho
(c) gm = 0.04 mho (d) gm = 0.4 millimilli mho

Q.3 The base to base resistance of a UJT is 6 K Ohm when the emitter Q.3
current is zero. If B1 R = 3.6 K Ohm, the intrinsic stand off ratio is
(a) n = 0.66 (b) n = 0.6
(c) n = 6.0 (d) n = 3.6

Q.4 A capacitor of 1 Q.4 μF initially charged to 10 V is connected across
an ideal inductor of 0.1 mH. The maximum current in the circuit is
(a) 0.5 A (b) 1 A
(c) 1.5 A (d) 2 A

Q.5 Silicon has a preference in IC technology because Q.5
(a) it is an indirect semiconductor
(b) it is a covalent semiconductor
(c) it is an elemental semiconductor
(d) of the availability of nature oxide SiO

Q.6 Three equal resistance of magnitude 5 Ohm each are connected Q.6
in delta. The resistance between any two pair of terminals of the
delta will be
(a) 5 Ohm (b) 5/3 Ohm
(c) 10/3 Ohm (d) 3/5 Ohm

Q.7 The R.M.S. value of a half wave rectified sinusoidal alternating Q.7
current with peak value Im is
(a) Im/1 (b) I/ 2 m
(c) I /2 m (d) I 3 m


Q.8 For a series resonant circuit, at the half power points,which of the
following is true?
(a) Current is half of the current at resonance.
(b) Resistance is equal to the reactance.
(c) The impedance is half the impedance at the resonance.
(d) None of the above

Q.9 The lossless line of characterstics impedance 300 Ohm is
terminated in a pure resistance of 200 Ohm. The value of the
standing wave ratio is
(a) 1.5 (b) 0.67
(c) 1.0 (d) 1.25

Q.10 The transient current in lossless L-C circuit when excited from an
AC source is, sine wave
(a) Critically damped (b) Underdamped
(c) Overdamped (d) Undamped

Q.11 The values of L and C for a low pass filter with cut off frequency of
2.5 KHz and operating with a terminated load resistance of 450
Ohm are given by
(a) 57.3 mH; 0.283 μF (b) 28.66 μH; 0.14 μF
(c) 114.64 mH; 0.566 mF (d) 50.23 mH; 0.632 mF

Q.12 The driving point impedance with poles at ω = 0(zero) and ω = ∞
(infinity) must have the
(a) s term in the denominator and an excess term in the numerator
(b) s term in the numerator and an excess term in the denominator
(c) s term in the numerator and equal number of terms in the
numerator and denominator
(d) s term in the denominator and equal number of terms in the
numerator and denominator