GATE Mechanical Practice Test
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- 1.
The compression ratio of an SI engine is in the range of
- A.
4 to 6
- B.
6 to 10
- C.
6 to 8
- D.
10 to 14
Correct Answer
B. 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:
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- 2.
The ignition quality of diesel fuel is indicated by
- A.
Octane number
- B.
Cetane number
- C.
Flash point
- D.
Fire point
Correct Answer
B. Cetane number -
- 3.
When air is adiabatically saturated, the temperature attained is
- A.
Dew point temperature
- B.
Wet bulb temperature
- C.
Dry bulb temperature
- D.
Triple point temperature
Correct Answer
B. Wet bulb temperatureExplanation
In adiabatic process wet bulb temp remain constantRate this question:
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- 4.
Cast steel is crankshaft is hardened by
- A.
Nitriding
- B.
Normalising
- C.
Carburising
- D.
Induction heating
Correct Answer
D. Induction heating -
- 5.
The alloying elements mainly used to improve the endurance strength of steel material is
- A.
Nickle
- B.
Vanadium
- C.
Molybdenum
- D.
Tungsten
Correct Answer
B. Vanadium -
- 6.
The moving mandrel is used in
- A.
Tube drawing
- B.
Wire drawing
- C.
Extrusion
- D.
Spinning
Correct Answer
B. Wire drawing -
- 7.
In metals subjected to cold working, strain hardening effect due to
- A.
Slip mechanism
- B.
Twinning mechanism
- C.
Dislocation mechanism
- D.
Fracture mechanism
Correct Answer
B. Twinning mechanism -
- 8.
Cold working of metals of metals increases
- A.
Tensile strength
- B.
Hardness
- C.
Yield strength
- D.
All of these
Correct Answer
D. All of these -
- 9.
A streamline and an equipotential line in a flow field
- A.
Are parallel to each other
- B.
Are perpendicular to each other
- C.
Intersect at an acute angle
- D.
Are identical
Correct Answer
B. Are perpendicular to each other -
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Current Version
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Mar 21, 2022Quiz Edited by
ProProfs Editorial Team -
Aug 18, 2013Quiz Created by
Klalit662
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