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Free mock test of SSC JE previous year exam questions asked in Jan-2018 set-1.
Which of the following is the dimensional formula of conductance?
A. M1L2T-3I-1
B. M1L2T-3I-2
C. M-1L-2T3I2
D. M1L1T-3I1
Answer C. M-1L-2T3I2
Which one of the following statement is TRUE about the resistance of a conductor?
(A) The resistance of a conductor is inversely proportional to the length of the conductor.
(B) The resistance of a conductor is directly proportional to t he area of the conductor.
(C) The resistance of a conductor is inversely proportional to the pressure applied on the conductor.
(D) The resistance of a conductor is inversely proportional to the area of the conductor.
Answer (D) The resistance of a conductor is inversely proportional to the area of the conductor.
In parallel combination of resistances, the voltage is ___________ ?
(A) lower a cross largest resistance
(B) higher across larges t resistance
(C) same across each resistance
(D) higher across smaller resistance
Answer (C) same across each resistance
Electrical conductivity of a conductor is measured in __________.
(A) Siemens
(B) Ohms
(C) Siemens/meter
(D) Ohms/metre
Answer (C) Siemens/meter
What will be the equivalent capacitance of a parallel combination of four capacitors having equal value of capacitance ‘C’?
(A) C/4
(B) 4C
(C) C/2
(D) 2C
Answer (B) 4C
What will be the potential difference (in V) between the ends of a conductor when the current flowing through the conductor is 3 A and the value of conductance is 0.3 fmho?
(A) 10
(B) 100
(C) 20
(D) 0.1
Answer (A) 10
Determine the value of charge stored (in mC) in a capacitor, when the value of capacitance is 0.01 mF and the potential difference between the ends of the capacitor is 20 V.
(A) 0.2
(B) 2
(C) 20
(D) 200
Answer (A) 0.2
Determine the value of current (in A) drawn from a 8 V battery, when a wire of 24 ohms resistance is stretched doubled its original length and then cut into two equal parts and these equal are connected in parallel with the battery?
(A) 0.33
(B) 0.65
(C) 0.24
(D) 0.47
Answer (A) 0.33
Determine the heat (in Joules) dissipated through a resistor of 15 ohms resistance, when 0.5 A of current is flowing through the resistor for 8 seconds.?
(A) 40
(B) 30
(C) 20
(D) 60
Answer (B) 30
What will be the color-coding of a resistor when the resistance of the resistor is 15 Ohms?
(A) Green-Brown-Black-Black
(B) Brown-Green-Brown-Brown
(C) Brown-Green-Black-Brown
(D) Brown-Green-Black-Black
Answer (D) Brown-Green-Black-Black
Which one of the following statement is TRUE about the Kirchhoff’s voltage law?
(A) The algebraic sum of all the voltages around any closed path is infinite.
(B) The algebraic sum of all the voltages around any closed path is negative.
(C) The algebraic sum of all the voltages around any closed path is one.
(D) The algebraic sum of all the voltages around any closed path is zero.
Answer (D) The algebraic sum of all the voltages around any closed path is zero.
Which one of the following is the CORRECT statement for superposition theorem?
(A) The algebraic sum of all the voltages around any closed path is zero.
(B) The overall current in any part of a linear circuit is equal t o the algebraic sum of the currents produced by each source separately.
(C) The sum of currents entering a node is equal to the sum of currents leaving the node.
(D) The algebraic sum of all the voltages around any closed path is equal to one.
Answer The overall current in any part of a linear circuit is equal t o the algebraic sum of the currents produced by each source separately.
Which one of the expression satisfies the condition of maximum power transfer theorem?
(A) ZL = Zs
(B) ZL = RL
(C) ZL = 2Zs
(D) XL = RL
Answer (A) ZL = Zs
Determine the value of current (in A) that flows through a resistor of 9 ohms, when the potential difference between the ends of the resistor is 36 V.
(A) 8
(B) 7
(C) 4
(D) 3
Answer (C) 4
What will be the value of load impedance (in ohms) for transmitting maximum power from the source to load when the source impedance is 8 + j4 ohms?.
(A) 8 – j4
(B) 8 +j4
(C) 4 +j8
(D) 4 -j8
Answer (A) 8 – j4
Determine the load resistance (in ohms) for a circuit when the maximum power transferred from source of 80 V to the load is 80 W?
(A) 40
(B) 20
(C) 10
(D) 5
Answer (B) 20
Which of the following is the dimensional formula for mutual inductance?
(A) ML2T2A-2
(B) ML2T2A2
(C)ML2T-2A-2
(D)ML-2T-2A2
Answer (C)ML2T-2A-2
Which property of a material opposes the passage of magnetic flux through it?
(A) Permeance
(B) Capacitance
(C) Inductance
(D) Reluctance
Answer (D) Reluctance
Determine the intensity of magnetization (in A/m) of a magnet when the pole strength of the magnet is 30 A-m and the pole of the magnet is 2 sq. m.?
(A) 60
(B) 30
(C) 25
(D) 15
Answer (D) 15
What will be the produced mmf (in Amp-turns) in a coil, if the coil has 160 turns and carries a current of 0.15 A?
(A) 32
(B) 24
(C) 16
(D) 8
Answer (B) 24
Determine the reluctance (in Amp-turns/Wb) of a coil, when the flux through the coil is 25 Wb and the value of produced mmf is 50 Amp-turns.
(A) 2
(B) 4
(C) 6
(D) 8
Answer (A) 2
Determine the magnetic field intensity (in Amp-turns/m) of 5 metre long coil when the coil has 100 turns and carries a current of 0.6 A?
(A) 15
(B) 12
(C) 10
(D) 8
Answer (B) 12
Determine the self-inductance (in mH) of a 3 m long air-cored solenoid, when the coil has 300 turns and the diameter of the coil 12 cm.?
(A) 0.41
(B) 0.35
(C) 0.32
(D) 0.24
Answer (A) 0.41
Determine the current (in A) through a 60 cm long solenoid when the solenoid has 400 turns and the value of magnetic field at the centre of the solenoid is 6 mT.?
(A) 4.4
(B) 5.6
(C) 7.2
(D) 8.4
Answer (C) 7.2
Determine the time-period (in ms) of a sinusoidal wave when the frequency of the wave is 60 Hz.?
(A) 16.67
(B) 18.26
(C) 20.24
(D) 26
Answer (A) 16.67
Which of the following is the unit of frequency of an AC signal?
(A) Hertz/Second
(B) Revolution
(C) Hertz
(D) Revolution/second
Answer (C) Hertz
Which one of the following is the CORRECT relation between the peak value and RMS value of current for a sine wave?
(A) Ims = 0.06Ip
(B)Ims = 0.87Ip
(C) Ims = 1.414Ip
(D) Ims = 0.707Ip
Answer (D) Ims = 0.707Ip
Determine the average value of alternating voltage (in V) when the peak value of the voltage is 120 V.?
(A) 76.44
(B) 86.34
(C) 110.34
(D) 188.38
Answer (A) 76.44
What will be the capacitance (in mF) of a circuit when the circuit is supplied with a 50 Hz frequency and the capacitive reactance of the circuit is 40 ohms?
(A) 0.08
(B) 0.8
(C) 1.4
(D) 2.6
Answer (A) 0.08
Determine the total power (in kW) consumed by a 3-phase delta connected system supplied by a line voltage of 240 V when the value of phase current is 20 A and the current lags the voltage by 60 degree.
(A) 9.4
(B) 8.6
(C) 8.2
(D) 7.2
Answer (D) 7.2
Determine the capacitive susceptence (in Siemens) of a circuit if the capacitance of the circuit is 0.08 mF and supplied with a 50 Hz frequency.?
(A) 0.025
(B) 0.034
(C) 0.046
(D) 0.064
Answer (A) 0.025
What will be the transient time (in seconds) of a series RC circuit when the value of the capacitance is 600 microfarad and the value of the resistance is 20 kilo-Ohms?
(A) 10
(B) 12
(C)14
(D) 16
Answer (B) 12
What will be the resonant frequency (in kHz) of a tank circuit when the capacitance and inductance of the circuit is 0.04 mF and 0.04 mH respectively?
(A) 5
(B) 6
(C) 4
(D) 1
Answer (C) 4
Multimetres cannot measure the value of .?
(A) voltage
(B) current
(C) resistance
(D) phase angle
Answer (D) phase angle
Which of the following statement is TRUE?
(A) A galvanometer can be converted into ammeter by connecting a low value of resistance in series with the galvanometer.
(B) A galvanometer can be converted into ammeter by connecting a low value of resistance in parallel with the galvanometer.
(C) A galvanometer can be converted into ammeter by connecting a high value of resistance in series with the galvanometer.
(D) A galvanometer can be converted into ammeter by connecting a high value of resistance in parallel with the galvanometer.
Answer (B) A galvanometer can be converted into ammeter by connecting a low value of resistance in parallel with the galvanometer.
Which of the statement is TRUE about megger?
(A) Megger is used for the measurement of voltage.
(B) Megger is used for the measurement of current.
(C) Megger is used for the measurement of insulation resistance.
(D) Megger is used for the measurement of breakdown voltage of insulation.
Answer (C) Megger is used for the measurement of insulation resistance.
Which of the following bridge is most suitable for the measurement of inductance of a coil?
(A) Owen’s Bridge
(B) Schering Bridge
(C) Wien’s Bridge
(D) Wheatstone Bridge
Answer (A) Owen’s Bridge
Determine the required value of series resistance (in Ohms) to convert a galvanometer into a voltmeter of reading 0.4 volt range when the resistance of the galvanometer is 40 ohms and the value of current for full-scale deflection is 4 mA.?
(A) 60
(B) 5.0
(C) 40
(D) 30
Answer (A) 60