Uttarakhand Junior Engineer Trainee (UBTER) Solved Paper 2015

61. A transistor works in ……… regions.
(A) 1
(B) 2
(C) 3
(D) 9
Show AnswerAnswer – C

62. The a and ß of a transistor are related to each other as-—-
(A) 
(B) 
(C) 
(D) None of these
Show AnswerAnswer – A

63. A 220 V d.c. shunt motor runs at 500 rpm when the armature current is 50 A. If the torque is doubled, the speed will be ……… (given that Ra = 0.2 Ω)
(A) 476 r.p.m.
(B) 500 r.p.m.
(C) 525 r.p.m.
(D) 576 r.p.m.
Show AnswerAnswer – A

64. The ‘V’ curve of synchronous motor shows the relationship between—
(A) Applied voltage and back e.m.f.
(B) Back e.m.f. and armature current
(C) Armature current and rotor field current
(D) Back e.m.f. and power factor

Show AnswerAnswer – C

65. A 6 pole induction motor is supplied by a 10 pole alternator which is driven at 600 r.p.m. If the motor is running at 970 r.p.m. determine the percentage slip ?
(A) 3%
(B) 4%
(C) 5%
(D) 6%.
Show AnswerAnswer – A

66. The value of Stefan Boltzmann constant is equal to
(A) 4.97 x 10^-4
(B) 4.97 x 10^-6
(C) 4.97 x 10^-8
(D) 4.97 x 10^-10
Show AnswerAnswer – C

67. According to Newton’s law of cooling, the rate of heat transfer from a solid surface area A, at a temperature t₁, to a fluid at temperature t₂, is given by
(A) Q = hA(t₁ + t₂)
(B) Q = hA(t₁ – t₂)
(C) Q=h/A (t₁ + t₂)
(D) Q=h/A (t₁– t₂)
Show AnswerAnswer – B

68. Flywheel absorbs energy when—
(A) The turning moment is less than the resisting moment
(B) The turning moment is equal to resisting moment
(C) The turning moment is greater than the resisting moment
(D) None of these
Show AnswerAnswer – C

69. The figure shows the circuit symbol of—

(A) FET
(B) MOSFET
(C) MOSFET
(D) MOSFET
Show AnswerAnswer – D

70. In the circuit shown in the figure, if R_L=R_c=1 kΩ, then the value of V₀, will be—

(A) 4.55 V
(B) 2.4 V
(C) 1 V
(D) Zero
Show AnswerAnswer – B

71. Given (135)_{base x} + (144)_{base x} = (323)_{base x}. What the value of base x ?
(A) 5
(B) 3
(C) 12
(D) 6
Show AnswerAnswer – D

72. (1111)₂ in grey code represents—
(A) 9
(B) 15
(C) 10
(D) 16
Show AnswerAnswer – C

73. The difference between the measured value and the true value is called
(A) Gross error
(B) Relative error
(C) Probable error
(D) Absolute error
Show AnswerAnswer – D

74. Ring main distribution system is more reliable because of
(A) More protective devices used
(B) Two or more sources of supply
(C) Higher size of conductor used
(D) Higher load current
Show AnswerAnswer – B

75. A piece of silver wire has a resistance of 1 Ω. What will be the resistance of manganin
wire of one-third length and one-third the diameter, if the specific resistance of the manganin is 30 times that of silver
(A) 1/9 Ω
(B) 1/90 Ω
(C) 9 Ω
(D) 90 Ω
Show AnswerAnswer – D

76. What is the reactance of an 8 μF filter capacitor at a frequency of 120 Hz ?
(A) 6.28 Ω
(B) 120 Ω
(C) 165.9 Ω
(D) 16.59 Ω
Show AnswerAnswer – C

77. The maximum bending moment in case of simply supported beam of span ‘L’ carrying a uniform distributed load of W tons/em is equal to –
(A) WL²/4
(B) WL/4
(C) WL²/8
(D) WL²/2
Show AnswerAnswer – C

78. The maximum slope in case of a cantilever with a point load at the free end is equal to –

(A) Q_max = WL/2EI
(B) Q_max = WL³/EI
(C) Q_max = WL⁴/3EI
(D) Q_max = WL²/3EI
Show AnswerAnswer – D

79. The crest diameter of the screw thread is the

(A) Largest diameter
(B) Minor diameter
(C) Mean diameter
(D) None of these
Show AnswerAnswer – A

80. The ………. current of a junction FET (JFET) is practically zero.
(A) Anode
(B) Gate
(C) Cathode
(D) All of the above
Show AnswerAnswer – B

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