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# PSC Vocational Teacher in Printing Technology Model Questions and Answers

Last Updated On: 30/04/2018

76. Equation to the line passing through the point (– 3, 2) and perpendicular to the line
4x + 2y + 5 = 0 is
(A) x – 3y + 2 = 0
(B) x – 2y + 7 = 0
(C) x + y = 0
(D) x – y = 0

77. The minimum value of the function f(x) = 3x^(4)-2x^(3)-6x^(2)+6x+1 in the interval (0, 2) is
(A) 1
(B) 4
(C) – 1
(D) 2

78. If x^(2) + 2xy + y^(2)=0 , then dy/dx is equal to
(A) – 2
(B) x + 2y
(C) – 1
(D) 2x + 2y

79. `int`x(logx) dx is equal to
(A) logx `(x^(2))/(2)+x^(2)/4+C` , C is constant
(B) logx `(x^(2))/(2)-x^(2)/4+C` , C is constant
(C) logx `(x^(2))/(2)-x^(3)/4+C` , C is constant
(D) logx `(x^(3))/(2)-x^(2)/4+C` , C is constant

80. Solution of the differential equation sec^(2)x tanydx+sec^(2)ytanx dy =0 is of the form
(A) tanx tany = c
(B) secx tany = c
(C) cotx coty = c
(D) secy tanx = c

81. The type of cement suitable for massive constructions like dams is
(A) acid resistant cement
(B) low heat cement
(C) sulphur resistant cement
(D) ordinary Portland cement

82. The type of rubble masonry in which prismatic shaped stones are used is
(A) Random rubble masonry
(B) Polygonal masonry
(C) Ashlar masonry
(D) Dry rubble masonry

83. The instrument used for measuring distance is
(A) electronic theodolite
(B) stereoscope
(C) wye level
(D) distomat

84. Which among the following is the best suited foundation for a building if the foundation covers more than 50% of the area of the building and if the soil is weak
(B) Raft foundation
(C) Combined footing
(D) Column footing

85. Optical square is the instrument used for
(A) setting 90°
(B) ranging of line
(C) leveling
(D) finding magnetic north

86. The valve(s) closed during compression stroke of an IC engine is/are
(A) Inlet valve
(B) Exhaust valve
(C) Both inlet and exhaust valve
(D) None of the above

87. The cooling tower in a steam thermal power plant is a device for
(A) Condensing steam into water
(B) Cooling exhaust gas coming out of a boiler
(C) Reducing temperature of superheated steam
(D) Reducing temperature of cooling water used in a condenser

88. The role of a moderator in a nuclear power plant is
(A) To absorb neutrons fully
(B) To control speed of neutrons
(C) Both 1 and 2 above depending on the need
(D) None of the above

89. The role of a surge tank in a hydroelectric power plant is
(A) To absorb sudden rises of pressure by storing water
(B) To store extra water during a brief drop of pressure
(C) Both 1 and 2 above
(D) To reduce the speed of the turbine when the level of dam is high

90. The following system in automobile diverts the power at right angles towards the driving wheels
(A) Torque tube
(B) Transfer case
(C) Final drive
(D) Differential

91. In a series RL circuit excited by a voltage v = `V_(m)sinOmegat`
(A) current lags the applied voltage
(B) current leads the applied voltage
(C) current is in phase with the applied voltage
(D) voltage across L and R are equal

92. In a parallel RC electric circuit …………. is same for each element.
(A) current
(B) voltage
(C) power
(D) none of the above

93. Across the surface of a charged conductor, the electric
(A) field is continuous
(B) potential is continuous
(C) field is discontinuous
(D) none of the above

94. The unit of electric energy is
(A) ampere
(B) voltage
(C) watt
(D) watthour

95. An alternating current source having voltage E = 220 sin (`omegat+Pi`/2) in an ac circuit. If the current draws from the circuit is I = 20 sin (`omegat-Pi`/2), the impedance of the circuit is
(A) 11Ω
(B) 15.6Ω
(C) 30.8Ω
(D) none of the above

96. Which one of the following is a direct band gap semiconductor used to fabricate light emitting diodes?
(A) Germanium
(B) Silicon
(C) Gallium Arsenide
(D) Gold

97. In a bridge rectifier circuit without filter, the maximum voltage across the secondary of the transformer is 18 volt. What is the maximum reverse voltage that appears across a diode in the non-conducting state during the rectification process?
(A) 0 volt
(B) 18 volt
(C) 9 volt
(D) 36 volt

98. Which of the following is a universal gate?
(A) NAND gate
(B) OR gate
(C) NOT gate
(D) XOR gate

99. What is the multiple access technique used in IS-95 digital cellular phone standard?
(A) SDMA
(B) CDMA
(C) TDMA
(D) FDMA

100. What is the size of RAM is 8051 micro controller?
(A) 32 bytes
(B) 64 bytes
(C) 8 bytes
(D) 128 bytes