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MCQs

Total Questions : 97 | Page 10 of 10 pages
Question 91. In order to have maximum power from a Pelton turbine, the bucket speed must be
  1.    equal to the jet speed.
  2.    equal to half of the jet speed.
  3.    equal to twice the jet speed.
  4.    independent of the jet speed.
 Discuss Question
Answer: Option B. -> equal to half of the jet speed.


-NA-


Question 92. Consider one-dimensional steady state heat conduction along x-axis(0 ≤ x ≤ L) through a plane wall with the boundary surfaces (x=0 and x=L) maintained at temperatures of 0°C and 100°C. Heat is generated uniformly throughout the wall. Choose the CORRECT statement.
  1.    The direction of heat transfer will be from the surface at 100°C to the surface at 0°C.
  2.    The maximum temperature inside the wall must be greater than 100°C.
  3.    The temperature distribution is linear within the wall.
  4.    The temperature distribution is symmetric about the mid-plane of the wall.
 Discuss Question
Answer: Option B. -> The maximum temperature inside the wall must be greater than 100°C.


-NA-


Question 93. A long thin walled cylindrical shell, closed at both the ends, is subjected to an internal pressure.
The ratio of the hoop stress (circumferential stress) to longitudinal stress developed in the shell is
  1.    0.5
  2.    1.0
  3.    2.0
  4.    4.0
 Discuss Question
Answer: Option C. -> 2.0


-NA-


Question 94. A cylinder contains 5 m3 of an ideal gas at a pressure of 1 bar. This gas is compressed in a reversible isothermal process till its pressure increases to 5 bar. The work in kJ required for this process is
  1.    804.7
  2.    953.2
  3.    981.7
  4.    1012.2
 Discuss Question
Answer: Option A. -> 804.7


-NA-


Question 95. Two cutting tools are being compared for a machining operation. The tool life equations are: Carbide tool: VT1.6 = 3000HSS tool: VT0.6 = 200where V is the cutting speed in m/min and T is the tool life in min. The carbide tool will provide higher tool life if the cutting speed in m/min exceeds
  1.    15.0
  2.    39.4
  3.    49.3
  4.    60.0
 Discuss Question
Answer: Option B. -> 39.4


-NA-


Question 96. In a CAD package, mirror image of a 2D point P(5,10) is to be obtained about a line which passes through the origin and makes an angle of 45° counterclockwise with the X-axis. The coordinates of the transformed point will be
  1.    (7.5, 5)
  2.    (10, 5)
  3.    (7.5, -5)
  4.    (10, -5)
 Discuss Question
Answer: Option B. -> (10, 5)


-NA-


Question 97. A linear programming problem is shown below.Maximize    3x + 7ySubject to 3x + 7y ≤ 10                  4x + 6y ≤ 8                  x, y ≥ 0It has
  1.    an unbounded objective function.
  2.    exactly one optimal solution.
  3.    exactly two optimal solutions.
  4.    infinitely many optimal solutions.
 Discuss Question
Answer: Option B. -> exactly one optimal solution.


-NA-


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