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BARC 2021 ME: Full Syllabus Test 7
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Question 1
A steam plant has the boiler efficiency of 82%, turbine efficiency (mechanical) of 84%, generator efficiency of 85%. If 6% of the generated power is used to run the auxiliaries, the overall plant efficiency is ___________.
Question 2
The firm has proposed a standard weightage of 50% for the previous month, 30% for the preceding the previous, and 20% for the remaining. The firm calculates the forecast based on three-month moving average. Determine the forecast for the month of April?
![](https://gradeup-question-images.grdp.co/liveData/PROJ7863/1507795282561782.png)
Question 3
A carnot engine with 50 percent thermal efficiency is used to drive a carnot refrigerator having a coefficient of performance of 5. The energy absorbed by the engine for each kJ energy absorbed from the cold body by the refrigerator is _________kJ.
Question 4
A smooth flat rectangular plate is placed edgewisw in a stream of fluid. At what fraction of the length from the leading edge would the drag force on the front portion be equal to half of the total drag force ? (Assume the boundary layer to be laminar).
Question 5
A heat engine having an efficiency of 70% is used to drive a refrigerator having a co-efficient of performance of 5. The energy absorbed from low temperature reservoir by the refrigerator for each kJ of energy absorbed from high temperature source by the engine is
Question 6
Mach number is significant in
Question 7
5 kg of water at 273 K is brought in to contact with a heat reservoir at 373 K.When water has reached 373 K, the entropy change the universe would be _____________ kJ/k.
Question 8
Two rectangular blocks, having identical dimensions, can be arranged either in configuration I or in configuration II as shown in figure. One of the blocks has thermal conductivity k and the other 2k. The temperature difference between the ends along the x-axis is the same in both the configurations. It takes 9s to transport a certain amount of heat from the hot end to the cold end in the configuration I. The time to transport the same amount of heat in the configuration II is
![35.jpg](https://gradeup-question-images.grdp.co/liveData/PROJ5544/1497682704945858.jpg)
Question 9
A liquid with specific gravity of 0.94 undergoes a reduction in volume of 0.22% when subjected to an increase in pressure of 1400 kPa. The velocity of propagation of sound in this liquid will be ___________m/s.
Question 10
Match the items in columns I and II.
![](https://gs-question-images.grdp.co/1453716707662540.jpg)
Question 11
A thin cylinder of internal diameter 0.55m contains air at a pressure of 7 N/mm2 If the maximum permissible stress is 75N/mm2, find the thickness of the cylinder_______.
Question 12
A hollow shaft of 1 m length is designed to transmit a power of 30 kW at 700 rpm. The maximum permissible angle of twist in the shaft is
. The inner diameter of the shaft is 0.7 times the outer diameter. The modulus of rigidity is 80 GPa. The outside diameter (in mm) of the shaft is _______
![Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE ME 18-Mar\GATE-ME-2015-P2_files\image078.png](https://gs-question-images.grdp.co/1458371905076721.png)
Question 13
If
, where x > 0 then
is
![](https://gradeup-question-images.grdp.co/equations/1527163401114.png)
![](https://gradeup-question-images.grdp.co/liveData/PROJ6863/1502283083462889.png)
Question 14
A point mass M is released from rest and slides down a spherical bowl (of radius R) from a height H as shown in the figure below. The surface of the bowl is smooth (no friction). The velocity of the mass at the bottom of the bowl is
![](https://gradeup-question-images.grdp.co/liveData/PROJ441/147445478752498.png)
![](https://gradeup-question-images.grdp.co/liveData/PROJ441/147445478752498.png)
Question 15
A 1 kg block is resting on a surface with Coefficient of friction μ = 0.1 A force of 0.8 N is applied to the block as shown in the figure. The friction force is
![Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC-ME-17-Mar\GATE-ME-2011_files\image118.jpg](https://gs-question-images.grdp.co/1459317655306258.jpg)
![Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC-ME-17-Mar\GATE-ME-2011_files\image118.jpg](https://gs-question-images.grdp.co/1459317655306258.jpg)
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