GATE Mechanical engg online test paper 6
by Esha Upadhyay · Published · Updated
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Question 1 of 21
1. Question
Consider a simple gas turbine (Brayton) cycle and a gas turbine cycle with perfect regeneration. In both the cycles, the pressure ratio is 6 and the ratio of the specific heats of the working medium is 1.4. The ratio of minimum to maximum temperatures is 0.3 (with temperatures expressed in K) in the regenerative cycle. The ratio of the thermal efficiency of the simple cycle to that of the regenerative cycle is
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Question 2 of 21
2. Question
In a singlechannel queuing model, the customer arrival rate is 12 per hour and the serving rate is 24 per hour. The expected time that a customer is in queue is _______ minutes.
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Question 3 of 21
3. Question
The welding process which uses a blanket of fusible granular flux is
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Question 4 of 21
4. Question
The value of true strain produced in compressing a cylinder to half its original length is
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Question 5 of 21
5. Question
The following data is applicable for a turning operation. The length of job is 900 mm, diameter of job is 200 mm, feed rate is 0.25 mm/rev and optimum cutting speed is 300 m/min. The machining time (in min) is
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Question 6 of 21
6. Question
In an ultrasonic machining (USM) process, the material removal rate (MRR) is plotted as a function of the feed force of the USM tool. With increasing feed force, the MRR exhibits the following behavior:
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Question 7 of 21
7. Question
The probability that a screw manufactured by a company is defective is 0.1. The company sells screws in packets containing 5 screws and gives a guarantee of replacement if one or more screws in the packet are found to be defective. The probability that a packet would have to be replaced is
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Question 8 of 21
8. Question
In a structural member under fatigue loading, the minimum and maximum stresses developed at the critical point are 50 MPa and 150 MPa, respectively. The endurance, yield, and the ultimate strengths of the material are 200 MPa, 300 MPa and 400 MPa, respectively. The factor of safety using modified Goodman criterion is
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Question 9 of 21
9. Question
Consider fluid flow between two infinite horizontal plates which are parallel (the gap between them being 50 mm). The top plate is sliding parallel to the stationary bottom plate at a speed of 3 m/s.The flow between the plates is solely due to the motion of the top plate. The force per unit area
(magnitude) required to maintain the bottom plate stationary is _________ N/m2.Viscosity of the fluid μ = 0.44 kg/ms and density p= 888 kg/m3.Correct
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Question 10 of 21
10. Question
A reversible cycle receives 40 kJ of heat from one heat source at a temperature of 127 degreeC and 37 kJ from another heat source at 97 degreeC. The heat rejected (in kJ) to the heat sink at 47 degreeC is __________
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Question 11 of 21
11. Question
A food processing company uses 25,000 kg of corn flour every year. The quantitydiscount price of corn flour is provided in the table below:
Quantity (kg) Unit price (Rs/kg)
1749 70
7501499 65
1500 and above 60
The order processing charges are Rs. 500/order. The handling plus carryover charge on an annual basis is 20% of the purchase price of the corn flour per kg. The optimal order quantity (in kg) isCorrect
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Question 12 of 21
12. Question
Solutions of Laplace’s equation having continuous secondorder partial derivatives are called
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Question 13 of 21
13. Question
The area (in percentage) under standard normal distribution curve of random variable Z within limits from −3 to +3 is
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Question 14 of 21
14. Question
Which of the bearings given below SHOULD NOT be subjected to a thrust load?
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Question 15 of 21
15. Question
Grashof number signifies the ratio of
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Question 16 of 21
16. Question
The INCORRECT statement about the characteristics of critical point of a pure substance is that
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Question 17 of 21
17. Question
In a wirecut EDM process the necessary conditions that have to be met for making a successful cut are that
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Question 18 of 21
18. Question
Internal gears are manufactured by
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Question 19 of 21
19. Question
Match the following part programming codes with their respective functions Part Programming Codes Functions
P. G01 I. Spindle stop
Q. G03 II. Spindle rotation, clockwise
R. M03 III. Circular interpolation, anticlockwise
S. M05 IV. Linear interpolationCorrect
Incorrect

Question 20 of 21
20. Question
In PERT chart, the activity time distribution is
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Question 21 of 21
21. Question
Steam at an initial enthalpy of 100 kJ/kg and inlet velocity of 100 m/s, enters an insulated horizontal nozzle. It leaves the nozzle at 200 m/s. The exit enthalpy (in kJ/kg) is
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