JCECE Question Paper Pdf

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Ques.1) Doubling the voltage gain causes a ________ dB ________.

10, increase
6, increase
10, decrease
6, decrease
Ques2.)________ frequencies are values of frequency at which the RC circuits reduce the voltage gain to 70.7% of its midrange value.

Critical
Cutoff
Corner
all of the above
Ques.3)A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave.

3 dB
13 dB
12 dB
6 dB
Ques.4) An amplifier has an Rin = 1.2 k. The coupling capacitor is 1 F. Determine the approximate lower cutoff frequency.

133 Hz
1.33 kHz
13.3 kHz
133 kHz
Ques.5) According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.

True
False
Ques.6)The friction experienced by a body, when in motion, is known as

rolling friction
dynamic friction
limiting friction
static friction
Ques.7) Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity

v
v/2
v/4
v/8
Ques.8) The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

Agree
Disagree
Ques.9) The coefficient of restitution for elastic bodies is one.

Correct
Incorrect
Ques.10) Strain energy is the

energy stored in a body when strained within elastic limits
energy stored in a body when strained upto the breaking of a specimen
maximum strain energy which can be stored in a body
proof resilience per unit volume of a material
Ques.11)A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the

axis of load
perpendicular to the axis of load
maximum moment of inertia
minimum moment of inertia
Ques.12)The neutral axis of the cross-section a beam is that axis at which the bending stress is

zero
minimum
maximum
infinity
Ques.13)Euler's formula holds good only for

short columns
long columns
both short and long columns
weak columns
Ques.14)The object of caulking in a riveted joint is to make the joint

free from corrosion
stronger in tension
free from stresses
leak-proof
Ques.15)Powder metallurgy process does not make metal powder by

atomisation
grinding/milling
hammering
electrolytic deposition
Ques.16) In the blast furnace, incorporation of water vapour in the blast gives the following effect.

Increases the reducing potential of the gas.
Increases the flame temperature.
No significant change occurs.
Increases the hydrogen content in the metal.
Ques.17) Pick out the wrong statement.

A ferromagnetic material becomes paramagnetic above the 'Curie temperature'.
Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials.
Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces
Tungsten steel and alnico are not hard magnetic materials.
Ques.18) The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

60 - 100
400 - 700
1200 -1500
2000 - 2300
Ques.19)Maximum permissible air velocity in pipelines is about __________ metre/second.

5
10
20
40
Ques.20) A molecular technique in which DNA sequences between two oligonucleotide primers can be amplified is known as

southern blotting
northern blotting
polymerase chain reaction
DNA replication


Jharkhand Combined Entrance Competitive Examination Engineering Paper







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