GATE PI topic:production-engineering PYQs & Answers — Page 36

Questions 351–360 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 36 of 65

The dimensionless number defined by the ratio of inertial force to viscous force is called

Your answerChoose one option.

Mach number

Froude number

Weber number

Reynolds number

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A small capillary tube of 3 mm inner diameter is inserted into a fluid having density 900 kg/m

, surface tension 0.1 N/m, and contact angle 30°. The rise in the height of fluid in the capillary tube due to surface tension is

Your answerChoose one option.

11.4 mm

128.3 mm

89.1 mm

154.1 mm

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A given steel has identical yield strength of 700 MPa in uni-axial tension and uni-axial compression. If the steel is subjected to pure shear stress such that the three principal stresses are

with

, then the stress

in MPa for the initiation of plastic yielding in the steel as per von Mises yield criterion is ____________. [round off to 2 decimal places]

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A cylindrical mild steel tensile test specimen of gauge length 50 mm and diameter 10 mm is extended in two stages at a deformation speed of 4 mm/min. The specimen is extended from 50 mm to 55 mm in the first stage, and from 55 mm to 60 mm in the second stage. Neglecting elastic deformation, the total longitudinal true strain is ____________. [round off to 2 decimal places]

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A M30 bolt needs to be subjected to pretension

kN. If the torque coefficient

for the bolt is 0.2, then the torque in Nm needed to achieve this pretension is ____________. [in integer]

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A 150 mm wide polyamide flat belt is transmitting 15 kW power through a belt-pulley system. The driving pulley of 150 mm pitch diameter is rotating at 200 RPM. If

is the belt tension on high tension side, and

is the belt tension on low tension side, then the difference in belt tensions

in N is ____________. [round off to one decimal place]

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Heat is being removed from a refrigerator at a rate of 300 kJ/min to maintain its inside temperature at 2 °C. If the input power to the refrigerator is 2 kW, the coefficient of performance of the refrigerator is ____________. [round off to one decimal place]

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In an ideal Otto cycle, 800 kJ/kg is transferred to air during the constant volume heat addition process and 381 kJ/kg is removed during the constant volume heat rejection process. The thermal efficiency in % of the cycle is ____________. [round off to one decimal place]

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with

being real and

, then

____________. [correct up to one decimal place]

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The minimum value of function

defined by

is ____________. [in integer]

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GATE PI topic:production-engineering PYQs

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25