(Papers) SSC Junior Engineer Exam Paper - 2018 "held on 25 Jan 2018" Afternoon Shift (General Engineering Civil, Electrical, Mechanical)
(Papers) SSC Junior Engineer Exam Paper - 2018 "held on 25
Jan 2018" Afternoon Shift
(General Engineering Civil, Electrical, Mechanical)
QID : 901 - Which property of an electrical conductor opposes the flow of current through it?
1) Conductance
2) Resistance
3) Reluctance
4) Permeance
Correct Answer: Resistance
QID : 902 - Ohm is the S.I unit of ______.
1) Capacitance
2) Inductance
3) Resistance
4) Conductance
Correct Answer: Resistance
QID : 903 - What will be the resistance (in Ohms) of a resistor, when the dissipated power and the current flowing through the resistor is 12 W and 2 A respectively?
1) 6
2) 24
3) 2
4) 3
Correct Answer: 3
QID : 904 - What will be the resistance (in Ohms) of a cylindrical wire, if the length, diameter and the resistivity of the wire is 4 m, 0.2 m and 0.4 Ohms-m respectively?
1) 49
2) 56
3) 54
4) 51
Correct Answer: 51
QID : 905 - Which of the following material has the highest resistivity?
1) Insulators
2) Conductors
3) Semiconductors
4) Superconductor
Correct Answer: Insulators
QID : 906 -
1) 40
2) 50
3) 30
4) 60
Correct Answer: 50
QID : 907 - Determine the power (in W) of a lamp of 220 V, when the resistance of the lamp is 100 Ohms.
1) 448
2) 486
3) 484
4) 488
Correct Answer: 484
QID : 908 - What will be the voltage (in V) of a battery connected to a parallel plate capacitor with air as dielectric, having plate area of 6 sq. cm and separation between the plates is 2 mm, which stores a charge of 8.0 pC on the plates?
1) 3
2) 9
3) 6
4) 5
Correct Answer: 3
QID : 909 -
1) 8
2) 4
3) 2
4) 6
Correct Answer: 4
QID : 910 -
1) 300
2) 400
3) 500
4) 600
Correct Answer: 400
QID : 911 - Which of the following statement is CORRECT?
1) Superposition theorem is applicable to only those circuits that only have
active elements.
2) Superposition theorem is applicable to only those circuits that only have
passive elements.
3) Superposition theorem is applicable to only those circuits that only have
linear bilateral elements.
4) Superposition theorem is applicable to only those circuits that only have
non-linear bilateral elements.
Correct Answer: Superposition theorem is applicable to only those circuits that only have linear bilateral elements.
QID : 912 - The algebraic sum of all the voltages around any closed path is _______.
1) Negative
2) Zero
3) One
4) Infinite
Correct Answer: Zero
QID : 913 - Which one of the following law is based on the principle of conservation of electric charge?
1) Kirchhoff’s Current Law
2) Kirchhoff’s Voltage Law
3) Ohm’s Law
4) Coulomb’s Law
Correct Answer: Kirchhoff’s Current Law
QID : 914 - The source resistance of an ideal voltage source should be ___________.
1) Infinite
2) One
3) Zero
4) Greater than one
Correct Answer: Zero
QID : 915 -
1) 14.35
2) 13.33
3) 15.45
4) 12.33
Correct Answer: 13.33
QID : 916 -
1) 0.11
2) 110
3) 0.101
4) 101
Correct Answer: 101
QID : 917 -
1) 5.45
2) 5.89
3) 1.54
4) 7.69
Correct Answer: 1.54
QID : 918 -
1) 5.72, 1.71
2) 4.67, 2.24
3) 3.54, 1.01
4) 4.87, 2.09
Correct Answer: 5.72, 1.71
QID : 919 -
1) 5.65
2) 6.11
3) 4.32
4) 7.45
Correct Answer: 6.11
QID : 920 -
1) 0.25
2) 0.32
3) 0.13
4) 0.42
Correct Answer: 0.13
QID : 921 - Which one of the following statement is NOT true about the magnetic lines of force?
1) They attract each other while travelling in the same direction.
2) They behave like a stretched elastic string.
3) They do not cross each other.
4) They can pass through all media.
Correct Answer: They attract each other while travelling in the same direction.
QID : 922 - The relative permeability of paramagnetic material is ________.
1) slightly greater than zero
2) equal to zero
3) equal to one
4) greater than one
Correct Answer: greater than one
QID : 923 - The SI unit of magnetic flux density is __________.
1) Henry
2) Tesla
3) Coulomb
4) Weber
Correct Answer: Tesla
QID : 924 - Which one of the following is the formula of Intensity of magnetization?
1)
2)
3)
4)
Correct Answer:
QID : 925 - What will be the coefficient of self-induction (in H) of the coil, if the current changes from +4 A to -4 A in 0.10-seconds and the induced EMF is 16 V?
1) 1.2
2) 2
3) 0.2
4) 0.8
Correct Answer: 0.2
QID : 926 -
1) 0.0058
2) 0.0072
3) 0.0061
4) 0.0035
Correct Answer: 0.0072
QID : 927 - What will be the produced mmf (in Amp-turns) in a magnetic circuit, if it has 100 number of turns and carrying a current of 0.2 A?
1) 20
2) 40
3) 500
4) 200
Correct Answer: 20
QID : 928 -
1) 221.3
2) 214.4
3) 232.5
4) 207.6
Correct Answer: 207.6
QID : 929 -
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1) 0.25
2) 0.5
3) 0.75
4) 1
Correct Answer: 0.25
QID : 930 -
1) 0.4
2) 0.2
3) 0.6
4) 0.9
Correct Answer: 0.6
QID : 931 - What is the average value of a DC voltage having a peak value of 25 V?
1) 0
2) 17.73
3) 22.5
4) 25
Correct Answer: 25
QID : 932 -
1) sinusoidal
2) rectangular
3) square
4) sawtooth
Correct Answer: sawtooth
QID : 933 - The inductive reactance of a circuit is 60 Ohms when it is supplied with a 50 Hz supply. What will be the value of inductive reactance (in Ohms) of the circuit, if it is supplied with 60 Hz supply?
1) 72
2) 86
3) 94
4) 105
Correct Answer: 72
QID : 934 -
1) 130
2) 120
3) 13
4) 12
Correct Answer: 130
QID : 935 - Calculate the value of the quality factor of a series RLC circuit having resistance, inductance and capacitance of 30 Ohms, 27 mH and 0.03 mF respectively.
1) 0.86
2) 1
3) 2.6
4) 3
Correct Answer: 1
QID : 936 - What is the bandwidth (in kHz) of a series RLC circuit having resistance, inductance and capacitance of 80 Ohms, 2 mH and 0.01 mF respectively?
1) 10
2) 20
3) 40
4) 80
Correct Answer: 40
QID : 937 - Calculate the time taken (in seconds) by the capacitor to get fully charged in a series RC circuit having resistance and capacitance of 40 kilo-Ohms and 0.01 mF respectively.
1) 1
2) 2
3) 3
4) 4
Correct Answer: 2
QID : 938 - What is the value of line voltage (in kV) of a 3-phase star connected system having a phase voltage of 3.3 kV?
1) 2.1
2) 3.3
3) 5.7
4) 6.8
Correct Answer: 5.7
QID : 939 - A 3-phase star connected system is supplied by a line voltage of 440 V. The value of phase current is 50 A. What is the power (in kW) consumed by the system, if the current lags the voltage by 45 degrees?
1) 8.95
2) 24
3) 26.94
4) 47
Correct Answer: 26.94
QID : 940 - What is the magnitude of reactive power (in kVAR) of a balanced 3-phase delta connected system having a line voltage of 400 V and a line current of 50 A and the phase difference between the voltage and current is 53.13 degrees?
1) 0.2771
2) 2.771
3) 27.71
4) 277.1
Correct Answer: 27.71
QID : 941 - Which of the following is the dimension of inductance?
1)
2)
3)
4)
Correct Answer:
QID : 942 - Which of the following is a type of recording instrument?
1) Ammeter
2) Megger
3) Voltmeter
4) X-Y plotter
Correct Answer: X-Y plotter
QID : 943 - In 'two-wattmeter method' of power calculation of a 3-phase balanced star connected system, what is the power factor of the system if both the wattmeters show a positive reading?
1) 0
2) Greater than 0 but less than 0.5
3) 0.5
4) Greater than 0.5 but less than 1
Correct Answer: Greater than 0.5 but less than 1
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QID : 944 - A resistance of 75 Ohms is connected in shunt of a galvanometer, having an internal resistance of 25 Ohms, to convert it into an ammeter. What is the value of current (in A) flowing through the galvanometer, if the total current in the circuit is 5 A?
1) 2
2) 2.5
3) 3.65
4) 3.75
Correct Answer: 3.75
QID : 945 - Which of the following is TRUE about analog multimeter?
1) It is a type of absolute instrument.
2) It is a type of indicating instrument.
3) It is a type of recording instrument.
4) It is a type of integrating instrument.
Correct Answer: It is a type of indicating instrument.
QID : 946 -
1) Anderson's
2) Kelvin's Double
3) Maxwell's inductance
4) Wheatstone
Correct Answer: Maxwell's inductance
QID : 947 - Which of the following materials when used as the viewing surface of a CRO gives a reddish glow?
1) Zinc Sulfide with copper as impurity
2) Zinc Sulfide with silver as impurity
3) Yttrium Oxide
4) Pure Zinc Sulfide
Correct Answer: Yttrium Oxide
QID : 948 - Which of the following is TRUE about current transformers?
1) It decreases the range of AC ammeter.
2) It decreases the range of DC ammeter.
3) It increases the range of AC ammeter.
4) It increases the range of DC ammeter.
Correct Answer: It increases the range of AC ammeter.
QID : 949 - Which of the following produces breaking torque in induction type energy meter?
1) Air Dampers
2) Eddy current
3) Spring
4) Gravity
Correct Answer: Eddy current
QID : 950 - Which of the following can be used to measure frequency?
1) Anderson's Bridge
2) De-Sauty's Bridge
3) Owen's Bridge
4) Wien's Bridge
Correct Answer: Wien's Bridge
QID : 951 - The loss associated with the mechanical friction of a machine are called____.
1) eddy current loss
2) mechanical loss
3) stray load loss
4) hysterisis loss
Correct Answer: mechanical loss
QID : 952 - For a 3-phase load balanced condition, each phase has the same value of______.
1) impedance.
2) resistance.
3) power factor.
4) all options are correct
Correct Answer: all options are correct
QID : 953 - A short circuit test on a transformer gives____.
1) copper loss at full load
2) copper loss at any load
3) copper loss at half load
4) copper loss at over load
Correct Answer: copper loss at any load
QID : 954 - Armature reaction effect causes flux to reduce with_____.
1) decreasing torque
2) increasing torque
3) increase current
4) both increasing torque & increase current
Correct Answer: increase current
QID : 955 - The armature of a DC machine is made of_____.
1) mild steel
2) silicon steel
3) stainless steel
4) cast iron
Correct Answer: silicon steel
QID : 956 - DC generators are designed to develop armature voltages not exceeding 650 V because of the limitations of_______.
1) field winding
2) armature winding
3) commutator
4) starters
Correct Answer: commutator
QID : 957 - A step up transformer increases_____.
1) power
2) voltage
3) frequency
4) current
Correct Answer: voltage
QID : 958 - It is economical to transmit electricity at a_____.
1) very high voltage
2) very low voltage
3) very high current
4) None of these
Correct Answer: very high voltage
QID : 959 - Rotating magnetic fields are also used in 3phase induction motors rotor developing____.
1) eddy current
2) voltage lag
3) load current
4) phase current
Correct Answer: eddy current
QID : 960 - One of the speed control methods of a 3 phase induction motors is___.
1) V/F control
2) stator current control
3) core loss control
4) eddy current control
Correct Answer: V/F control
QID : 961 - A centrifugal switch is provided for disconnecting the auxiliary winding in a______.
1) Capacitor- start motor
2) Capacitor run motor
3) Reluctance motor
4) Hysteresis motor
Correct Answer: Capacitor- start motor
QID : 962 - In a split phase motor, the running winding should have___.
1) high resistance and low inductance
2) low resistance and high inductance
3) high resistance as well as high inductance
4) low resistance as well as low inductance
Correct Answer: low resistance and high inductance
QID : 963 - A reluctance motor
1) is self-starting
2) is constant speed motor
3) needs no D.C. excitation
4) all options are correct
Correct Answer: all options are correct
QID : 964 - The speed control of a universal motor used for sewing machines is done by______.
1) friction
2) varying the resistance
3) tapping the field
4) centrifugal mechanism
Correct Answer: varying the resistance
QID : 965 - The power factor of a single-phase induction motor is usually________.
1) lagging
2) always leading
3) unity
4) unity to 0.8 leading
Correct Answer: lagging
QID : 966 - Hysteresis motors are suitable for______.
1) fans
2) blowers
3) sound equipment
4) mixer grinders
Correct Answer: sound equipment
QID : 967 - A relay used on short transmission lines is______.
1) reactance relay
2) mho’s relay
3) impedance relay
4) None of these
Correct Answer: reactance relay
QID : 968 - The highest voltage transmission line starting from generating point is called______.
1) secondary transmission
2) secondary distribution
3) primary transmission
4) primary distribution
Correct Answer: primary transmission
QID : 969 - A 30 km transmission line carrying power at 33 kV is known as______.
1) short transmission line
2) long transmission line
3) high power line
4) ultra high voltage line
Correct Answer: short transmission line
QID : 970 - The insulating material for cables should be______.
1) non-hygroscopic
2) non-inflammable
3) acid proof
4) all options are correct
Correct Answer: all options are correct
QID : 971 - Name the equipment which runs an alternator.
1) Motor
2) Generator
3) Prime mover
4) Fan
Correct Answer: Prime mover
QID : 972 - Electric strength in a cable is more on____.
1) layer on the conductor
2) outside conductor
3) outer side of armouring
4) None of these
Correct Answer: layer on the conductor
QID : 973 - In places where acids and alkalies are present, the type of wiring used is____.
1) PVC
2) TRS
3) VIR
4) Weather proof
Correct Answer: TRS
QID : 974 - Replacement of wiring is not easy in which type of wiring_____.
1) conduit system
2) Lead sheathed
3) concealed wiring
4) cleat system
Correct Answer: concealed wiring
QID : 975 - ACSR conductor means
1) All conductor Steel Reinforced
2) Aluminium conductor steel reinforced
3) Aluminium conduit steel reinforced
4) All conduit steel reinforced
Correct Answer: Aluminium conductor steel reinforced
QID : 976 - The value of supply voltage for 500 W, 5 ohm load is____.
1) 100 V
2) 500 V
3) 50 V
4) 10 V
Correct Answer: 50 V
QID : 977 - The most important factor with respect to lighting quality is
1) colour
2) glare
3) illumination
4) uniform lighting
Correct Answer: glare
QID : 978 - In ACSR conductors, the insulation between aluminium and steel conductors is____.
1) varnish
2) bitumen
3) ceramic
4) No insulation is required
Correct Answer: No insulation is required
QID : 979 - Which one of the given fuse is bigger_____?
1) DC
2) AC
3) DC or AC
4) AC and DC are same
Correct Answer: DC
QID : 980 - What is the function of choke in a fluorescent lamp ?
1) starting purpose
2) produce high voltage at starting
3) improve power factor
4) minimize the power consumption
Correct Answer: produce high voltage at starting
QID : 981 - In an electric heater, the metal case is connected to_____.
1) Phase wire
2) earth wire
3) neutral wire
4) none of these
Correct Answer: earth wire
QID : 982 - Which of the following is not an indoor lighting ?
1) Residence light
2) Office light
3) Industry light
4) flood light
Correct Answer: flood light
QID : 983 - Carbon arc lamps are commonly used in____.
1) Domestic lighting
2) Street lighting
3) Cinema projectors
4) Photography
Correct Answer: Cinema projectors
QID : 984 - Lumen/watt is the unit of_____.
1) Light flux
2) Luminous intensity
3) Brightness
4) Luminous efficiency
Correct Answer: Luminous efficiency
QID : 985 - Arc can be produced by ?
1) AC current only
2) DC current only
3) Either AC or DC current
4) all options are correct
Correct Answer: Either AC or DC current
QID : 986 - A rectifier for welding has voltage/current characteristics as_____.
1) Drooping
2) Rising
3) Static
4) Variable
Correct Answer: Drooping
QID : 987 - The insulating material suitable for low temperature applications is____.
1) Cork
2) Diatomaceous earth
3) Asbestos paper
4) 75 per cent magnesia
Correct Answer: Diatomaceous earth
QID : 988 - The method suitable for heating of conducting medium is_____.
1) Induction heating
2) Indirect arc heating
3) Eddy current heating
4) Radiant heating
Correct Answer: Induction heating
QID : 989 - The number of valence electron in boron is_____.
1) 1
2) 2
3) 3
4) 5
Correct Answer: 3
QID : 990 - The potential barrier acts as a barrier against the flow of_____.
1) electrons only
2) holes only
3) electrons and holes
4) None of these
Correct Answer: electrons and holes
QID : 991 - The type of circuit that does not need a coupling capacitor is ____.
1) resistance loaded
2) transformer coupled
3) impedance coupled
4) single-tuned
Correct Answer: transformer coupled
QID : 992 - The plate current in a triode can be controlled by controlling_____.
1) plate voltage
2) grid voltage
3) plate voltage and grid voltage
4) grid current
Correct Answer: grid voltage
QID : 993 - A transistor consists of_____.
1) one p-n junction
2) two p-n junction
3) three p-n junction
4) four p-n junction
Correct Answer: two p-n junction
QID : 994 - The CE amplifier is most commonly used because of________.
1) less power gain
2) less output voltage
3) more power gain
4) low cost
Correct Answer: more power gain
QID : 995 - Synchronous motor shaft is made of_____.
1) Alnico
2) Chrome steel
3) Mild steel
4) Stainless steel
Correct Answer: Mild steel
QID : 996 - When the voltage applied to a synchronous motor is increased, which of the following will reduce ?
1) Stator flux
2) Pull in torque
3) Pull out torque
4) None of these
Correct Answer: None of these
QID : 997 - A synchronous motor has better power factor than an induction motor. This is due to_____.
1) Stator supply is not required to produce magnetic field
2) Synchronous motor has no slip
3) Mechanical load on the rotor remains constant
4) Synchronous motor has large airgap
Correct Answer: Stator supply is not required to produce magnetic field
QID : 998 - When the field circuit of an unloaded salient pole synchronous motor gets suddenly open circuited, then______.
1) the motor stops
2) it runs at a slower speed
3) it continues to run at the same speed
4) it runs at a very high speed
Correct Answer: the motor stops
QID : 999 - The resultant armature voltage of a synchronous motor is equal to the_______.
1) vector sum of Eb and V
2) vector difference of Eb and V
3) arithmetic sum of Eb and V
4) arithmetic difference of Eb and V
Correct Answer: vector difference of Eb and V
QID : 1000 - The armature current of a synchronous motor is minimum when operating at______.
1) unity power factor
2) 0.707 power factor lagging
3) 0.707 power factor leading
4) zero power factor leading
Correct Answer: unity power factor
