Junior Instructor Draughtsman Mechanic Exam Solved Questions Part 2
Junior Instructor Draughtsman Mechanic Exam Solved Questions Part 2 Question No 51-100
51. The command used for creating realistically shaded image of a three-dimensional wireframe
or solid model is :
(A) Imprint (B) Render
(C) Shell (D) Solview
52. Which of the following is/are output devices?
(i) Plotter
(ii) Web Cam
(iii) Projector
(A) Only (i) (B) All of the above
(C) Only (i) and (iii) (D) Only(i) and (ii)
53. Which are the commonly used CAD packages?
(i) STAAD
(ii) IDEAS
(iii) ADOBE PHOTOSHOP
(iv) PRO-Engineers
(A) All of the above (B) Only (i), (ii) and (iv)
(C) Only (i), (ii) and (iii) (D) Only (ii), (iii) and (iv)
54. The command used to display the various properties of 2D and 3D objects is :
(A) VOLPROP (B) MASSPROP
(C) VIEWPROP (D) AREAPROP
55. The angle between the edges of a cube in the isometric position will be equal to :
(A) 30° (B) 45°
(C) 60° (D) 120°
56. The practical limit ratio of forward and return stroke time in shaper is :
(A) 2 : 3 (B) 3 : 2
(C) 1 : 2 (D) 1 : 1
57. The included angle of lathe center for general purpose work is:
(A) 60 degree (B) 75 degree
(C) 90 degree (D) 30 degree
58. Climb milling is also called :
(A) Upmilling (B) Down milling
(C) Conventional milling (D) None of the above are correct
180/2023 10 A
59. Gang milling is the operation :
(A) Used for the production of angular surfaces
(B) Used for the production of flat vertical surfaces on both side of a workpiece
(C) Used for machining several surfaces of a workpiece simultaneously
(D) Used for the production of narrow slots or grooves
60. The largest diameter of work that will revolve without touching the bed of lathe is :
(A) Swing diameter over bed (B) Swing diameter over carriage
(C) Spindle diameter (D) Bar diameter
61. The angle of inclination of lip with drill axis twist drill for general work is :
(A) 69 degree (B) 59 degree
(C) 49 degree (D) 39 degree
62. A device which holds and locates a workpiece and guides and controls one or more cutting
tools is called :
(A) Fixture (B) Clamp
(C) Locator (D) Jig
63. Identify method used for motion control of tools in NC systems from given options.
(A) Point to point (B) Straight cut
(C) Contouring (D) All of the above
64. The chip space between the back of one tooth and the face of next tooth in a plain milling
cutter is called :
(A) Lead (B) Cutting edge
(C) Gash (D) Relief angle
65. The reciprocating member of a shaper is called :
(A) Base (B) Column
(C) Ram (D) Table
66. Projection welding is a :
(A) Continuous spot-welding process (B) Multi spot welding process
(C) Friction welding (D) Seam welding
67. Oxygen to acetylene ratio in the case of carburizing flame is :
(A) 0.9 : 1 (B) 1 : 1
(C) 1.5 : 1 (D) 2 : 1
68. Chaplets are :
(A) Casting defects (B) Core supporters
(C) Moulding boxes (D) Moulding machine
69. Tool used to cut threads on the inside of a hole, as in a nut is :
(A) Tap (B) Reamer
(C) Dies (D) Twist drill
70. Brake is a machine used in sheet metal work for :
(A) Bending and folding (B) Marking
(C) Striking (D) Cutting
71. The process of increasing the thickness of a bar at the expense of its length by end pressure
is :
(A) Drawing down (B) Punching
(C) Setting down (D) Upsetting
72. In sand moulding, the top part of flask is called :
(A) Cope (B) Cheek
(C) Drag (D) None of the above
73. The operation of cutting a sheet metal through part of its length and then bending the cut
portion is :
(A) Parting (B) Notching
(C) Slitting (D) Lancing
74. The round hole provided in the Anvil is called :
(A) Beak (B) Sprue hole
(C) Pritchel hole (D) Hardie hole
75. In thermit welding iron oxide and aluminium powder are mixed in the proportion :
(A) 1 : 1 (B) 1 : 3
(C) 3 : 3 (D) 3 : 1
76. On what basis are fire and water tube boilers classified?
(A) Depending the combustion products formed
(B) Depending the state of fuel
(C) Depending on the steam formation rate
(D) Depending tubular heating surface
180/2023 12 A
77. Both the pressure and velocity of steam drop in the case of :
(A) Impulse turbine
(B) Reaction turbine
(C) Velocity compounded impulse turbine
(D) Pressure compounded impulse turbine
78. The first nuclear power plant in India was installed at :
(A) Tarapur (B) Neyveli
(C) Kudankulam (D) Kota
79. The economiser in a boiler is used to :
(A) Increase the flue gas temperature
(B) Increase the efficiency of boiler
(C) Decrease the consumption of fuel
(D) Reduce the water consumption
80. La Mont boiler is a ——————— pressure, water tube steam boiler working on forced
circulation.
(A) Low (B) High
(C) Medium (D) Super-critical
81. Which of the following statements is incorrect?
(A) In spur gears, friction losses are less than 5 percent
(B) Mitre gears are spur gears with the same number of teeth
(C) Worm gears are generally made of cast iron
(D) Cycloid gears are free from interference
82. Priming is necessary in the following type of pump :
(A) Gear pump (B) Reciprocating pump
(C) Centrifugal pump (D) Multi stage pump
83. Belt drive is :
(A) Positive drive
(B) Not a positive drive
(C) Used for small torque transmission
(D) Used for non-slip drive
84. The centrifugal tension in belts :
(A) Increases the power transmission
(B) Decreases the power transmission
(C) Increases the wrap angle
(D) Increases the belt tension without affecting power transmitted
85. The stress in disc type flywheel as compared to rim type flywheel is :
(A) Equal (B) More
(C) Less (D) May be more or less
86. The angle between king pin centre line and vertical in the plane of wheel is called :
(A) King pin inclination (B) Castor
(C) Camber (D) Steering axis inclination
87. In Battery coil ignition system, the correct sequence of flow of current is :
(A) Battery-ammeter-ignition coil-distributor-spark plug
(B) Battery-ignition coil-ammeter-distributor-spark plug
(C) Battery-ignition coil-distributor-ammeter-spark plug
(D) Battery-distributor-ignition coil-ammeter-spark plug
88. In four cylinder in-line engine, the probable firing order is :
(A) 1-3-4-2 (B) 1-2-3-4
(C) 4-3-2-1 (D) 2-4-1-3
89. The following type of arrangement is used in synchromesh type gearbox :
(A) Single plate clutch (B) Dog clutch
(C) Fluid clutch (D) Semi-centrifugal clutch
90. The self-ignition temperature of diesel when compared to that of gasoline is :
(A) Equal (B) Lower
(C) Higher (D) Cannot be predicted
91. Which of the following constituents of the steel is weak and soft?
(A) Pearlite (B) Martensite
(C) Austenite (D) Ferrite
92. Dislocation in materials is a ____________ defect.
(A) Point (B) Line
(C) Plane (D) Volume
180/2023 14 A
93. Error in measurement is the difference between :
(A) Precision and accuracy
(B) True value and measured value
(C) Precision and true value
(D) Precision and measured value
94. One Angstrom is equal to :
(A) 10–6 m (B) 10–3 m
(C) 10–10 m (D) 10–12 m
95. What is the percentage of carbon in plain carbon steel?
(A) Above 80% (B) Less than 10%
(C) Less than 1.7% (D) Around 20%
96. Least count of a micrometer is :
(A) 0.02 mm (B) 0.05 mm
(C) 0.1 mm (D) 0.01 mm
97. Which of the following is incorrect with regard to vernier height gauge?
(A) Both the surfaces of measuring jaw should be at 45° to the base
(B) Surface plate is used as datum surface for measurements
(C) Removable clamps are used
(D) These gauges can be used for scribing purposes
98. This chart is a graphic representation of all the production activities occurring on the shop
floor :
(A) Templates (B) Quality control
(C) Flow process chart (D) Operation process chart
99. Which of the following industries should be located near the vicinity of raw materials?
(A) Bicycles (B) Mobile phones
(C) Machine tools (D) Steel mills
100. On which of the following types of surfaces should a class A fire extinguisher not be used?
(A) Cloth (B) Wood
(C) Paper (D) Electrical equipment
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