GATE Mechanical engg online test paper 5
by Esha Upadhyay · Published · Updated
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Question 1 of 21
1. Question
The INCORRECT statement about regeneration in vapor power cycle is that
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Question 2 of 21
2. Question
The “Jominy test” is used to find
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Question 3 of 21
3. Question
Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing and soldering are such that
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Question 4 of 21
4. Question
The part of a gating system which regulates the rate of pouring of molten metal is
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Question 5 of 21
5. Question
The nontraditional machining process that essentially requires vacuum is
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Question 6 of 21
6. Question
In an orthogonal cutting process the tool used has rake angle of zero degree. The measured cutting force and thrust force are 500 N and 250 N, respectively. The coefficient of friction between the tool and the chip is
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Question 7 of 21
7. Question
Match the following:
P. Feeler gauge I. Radius of an object
Q. Fillet gauge II. Diameter within limits by comparison
R. Snap gauge III. Clearance or gap between components
S. Cylindrical plug gauge IV. Inside diameter of straight holeCorrect
Incorrect

Question 8 of 21
8. Question
A steel ball of 10 mm diameter at 1000 K is required to be cooled to 350 K by immersing it in a water environment at 300 K. The convective heat transfer coefficient is 1000 W/m2K. Thermal conductivity of steel is 40 W/mK. The time constant for the cooling process is 16 s. The time required (in s) to reach the final temperature is
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Question 9 of 21
9. Question
A fluid (Prandtl number, Pr = 1) at 500 K flows over a flat plate of 1.5 m length, maintained at 300 K. The velocity of the fluid is 10 m/s. Assuming kinematic viscosity, v = 30*10 to the power 6 m2/s, the thermal boundary layer thickness (in mm) at 0.5 m from the leading edge is
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Question 10 of 21
10. Question
For water at 25 degreeC, dps/dTs= 0.189 kPa/K (ps is the saturation pressure in kPa and is the saturation temperature in K) and the specific volume of dry saturated vapour is 43.38 m3/kg. Assume that the specific volume of liquid is negligible in comparison with that of vapour. Using the ClausiusClapeyron equation, an estimate of the enthalpy of evaporation of water at 25 degreeC (in kJ/kg) is
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Question 11 of 21
11. Question
An ideal gas undergoes a reversible process in which the pressure varies linearly with volume. The conditions at the start (subscript 1) and at the end (subscript 2) of the process with usual notation are: p1= 100 kPa, v1= 0.2 m3 and p2= 200 kPa, v2= 0.1 m3 and the gas constant, R = 0.275 kJ/kgK. The magnitude of the work required for the process (in kJ) is
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Question 12 of 21
12. Question
A cylindrical job with diameter of 200 mm and height of 100 mm is to be cast using modulus method of riser design. Assume that the bottom surface of cylindrical riser does not contribute as cooling surface. If the diameter of the riser is equal to its height, then the height of the riser (in mm) is
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Question 13 of 21
13. Question
A 300 mm thick slab is being cold rolled using roll of 600 mm diameter. If the coefficient of friction is 0.08, the maximum possible reduction (in mm) is
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Question 14 of 21
14. Question
The annual demand for an item is 10,000 units. The unit cost is Rs. 100 and inventory carrying charges are 14.4% of the unit cost per annum. The cost of one procurement is Rs. 2000. The time between two consecutive orders to meet the above demand is _______ month(s).
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Question 15 of 21
15. Question
Maximize Z=15X1 + 20X2
subject to
12X1 + 4X2 ≥ 36
12X1 − 6X2 ≤ 24
X1, X2 ≥ 0
The above linear programming problem hasCorrect
Incorrect

Question 16 of 21
16. Question
Numerical integration using trapezoidal rule gives the best result for a single variable function, which is
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Question 17 of 21
17. Question
A shaft with a circular crosssection is subjected to pure twisting moment. The ratio of the maximum shear stress to the largest principal stress is
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Question 18 of 21
18. Question
A thin cylindrical pressure vessel with closedends is subjected to internal pressure. The ratio of circumferential (hoop) stress to the longitudinal stress is
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Question 19 of 21
19. Question
Assuming constant temperature condition and air to be an ideal gas, the variation in atmospheric pressure with height calculated from fluid statics is
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Question 20 of 21
20. Question
The internal energy of an ideal gas is a function of
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Question 21 of 21
21. Question
The heat removal rate from a refrigerated space and the power input to the compressor are 7.2 kW and 1.8 kW, respectively. The coefficient of performance (COP) of the refrigerator is ______
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