GATE Mechanical Practice Test
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The ignition quality of diesel fuel is indicated by
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Octane number
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Cetane number
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Flash point
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Fire point
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- 2.
Cold working of metals of metals increases
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Tensile strength
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Hardness
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Yield strength
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All of these
Correct Answer
A. All of these -
- 3.
A streamline and an equipotential line in a flow field
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Are parallel to each other
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Are perpendicular to each other
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Intersect at an acute angle
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Are identical
Correct Answer
A. Are perpendicular to each other -
- 4.
The compression ratio of an SI engine is in the range of
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4 to 6
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6 to 10
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6 to 8
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10 to 14
Correct Answer
A. 6 to 10Explanation
In case of SI engine the ignition occur due to spark so compression ratio relatively low about 6 to 10Rate this question:
-
- 5.
When air is adiabatically saturated, the temperature attained is
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Dew point temperature
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Wet bulb temperature
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Dry bulb temperature
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Triple point temperature
Correct Answer
A. Wet bulb temperatureExplanation
In adiabatic process wet bulb temp remain constantRate this question:
-
- 6.
The alloying elements mainly used to improve the endurance strength of steel material is
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Nickle
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Vanadium
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Molybdenum
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Tungsten
Correct Answer
A. Vanadium -
- 7.
Cast steel is crankshaft is hardened by
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Nitriding
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Normalising
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Carburising
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Induction heating
Correct Answer
A. Induction heating -
- 8.
The moving mandrel is used in
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Tube drawing
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Wire drawing
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Extrusion
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Spinning
Correct Answer
A. Wire drawing -
- 9.
In metals subjected to cold working, strain hardening effect due to
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Slip mechanism
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Twinning mechanism
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Dislocation mechanism
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Fracture mechanism
Correct Answer
A. Twinning mechanism -
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 21, 2022Quiz Edited by
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Aug 18, 2013Quiz Created by
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