Production and Industrial Engineering
GATE PI purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 311–320 of 650. Imported answers require independent review unless marked reviewed.
Question 51
Open questionPINAT2 marksNeeds review
In a gas tungsten arc welding process under steady state condition, the input voltage and current are measured as 18 V and 160 A, respectively. Heat loss during creation of arc is 40% of the input power. Heat loss through convection and radiation from the workpiece is 800 W. The effective power (in W) utilized to melt the workpiece is____________. [round off to nearest integer]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 52
Open questionPINAT2 marksNeeds review
During straight turning of a 20 mm diameter steel bar at a spindle speed of 400 revolutions per minute (RPM) with an HSS tool, a tool life of 10 minute was observed. When the same bar was turned at 200 RPM, the tool life increased to 40 minute. The tool life (in minute) while machining the bar at 300 RPM is____________. [round off to nearest integer]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 53
Open questionPINAT2 marksNeeds review
A cylindrical workpiece is turned using two different tools. Tool 1 has zero nose radius; side and end cutting edge angles are 20° and 10°, respectively. Tool 2 has 0.5 mm nose radius. Both the tools machine at a feed of 0.2 mm/rev. The ratio of ideal maximum height of unevenness on the surface produced by Tool 1 to that produced by Tool 2 is____________. [round off to one decimal place]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 54
Open questionPINAT2 marksNeeds review
For an electrochemical machining process
where
is the inter-electrode gap in mm at time
in minute, and
is the feed of the tool in mm/minute. The value of λ is 6×10⁻³ cm²/minute. For maintaining a constant inter-electrode gap of 0.1 mm, the feed (in mm/minute) should be____________. [round off to one decimal place]Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 55
Open questionPINAT2 marksNeeds review
The worktable of an open loop positioning system is driven by a lead screw with a pitch of 4 mm. The lead screw is connected to the shaft of a stepper motor. A gear of 80 teeth mounted on the stepper motor shaft meshes with a gear of 20 teeth mounted on the lead screw. The step angle of the stepper motor is 9°. The number of pulses required to move the table by 200 mm is____________. [in integer]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 56
Open questionPINAT2 marksNeeds review
The diameter of a cylindrical cavity is measured by using two spherical steel balls of diameters 3 cm and 4 cm. The balls are placed inside the cavity such that the bigger ball is above the smaller one as shown in the figure. If the depth of cavity is 6 cm, then the diameter (in cm) of cavity is____________. [round off to two decimal places]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 57
Open questionPINAT2 marksNeeds review
In a mobile screen manufacturing process on a mass scale basis, 5 samples of size 80 are inspected. Consider a p-chart with ±3σ limits (σ is the standard deviation). The numbers of defective items are given in the table.
Sample No. | Number of defective items
1 | 4
2 | 10
3 | 5
4 | 6
5 | 5
The upper control limit of the defective item (in fraction defective) is____________. [round off to two decimal places]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 58
Open questionPINAT2 marksNeeds review
In a factory, 100 bulbs are in use. The table lists the cumulative probability of the failure of a bulb for various durations.
Duration (month) | Cumulative probability
1 | 0.10
2 | 0.25
3 | 0.47
4 | 0.68
5 | 1.00
The factory follows the individual replacement policy. If the cost of replacing a bulb is ₹ 300, then the expected cost (in ₹) of replacement per month is____________. [round off to nearest integer]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 59
Open questionPINAT2 marksNeeds review
A company procures 384 parts annually. The annual holding cost per part is ₹ 30. If the ordering cost is ₹ 1000, then the economic order quantity is____________. [in integer]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 60
Open questionPINAT2 marksNeeds review
A time study engineer recorded the cycle time (in minute) for machining of a component. The recorded time study data is provided in the table. The performance rating of the worker is 110%. The standard time for machining (in minute) the component by assuming 10% allowance is____________. [round off to nearest integer]
Time study data
Cycle time (minute) | Frequency
42 | 1
43 | 2
44 | 3
45 | 2
46 | 1
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer