GATE ME 2021 Paper 2 — page 19

Complete GATE ME 2021 Paper 2 overview, original pages and practice · Timed previous-paper practice

Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 19 of 22

Ambient air flows over a heated slab having flat, top surface at

. The local temperature (in Kelvin) profile within the thermal boundary layer is given by

, where

is the distance measured from the slab surface in meter. If the thermal conductivity of air is 1.0 W/m.K and that of the slab is 100 W/m.K, then the magnitude of temperature gradient

within the slab at

is ____________ K/m (round off to the nearest integer).

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Water flows out from a large tank of cross-sectional area

through a small rounded orifice of cross-sectional area

, located at

. Initially the water level, measured from

, is

. The acceleration due to gravity is

Diagram for Mechanical Engineering question 46

Neglecting any losses, the time taken by water in the tank to reach a level of

is __________ seconds (round off to one decimal place).

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Consider the open feed water heater (FWH) shown in the figure given below:

Diagram for Mechanical Engineering question 47

Specific enthalpy of steam at location 2 is 2624 kJ/kg, specific enthalpy of water at location 5 is 226.7 kJ/kg and specific enthalpy of saturated water at location 6 is 708.6 kJ/kg. If the mass flow rate of water entering the open feed water heater (at location 5) is 100 kg/s then the mass flow rate of steam at location 2 will be __________ kg/s (round off to one decimal place).

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2021 · Paper 2

Question 45

Question 46

Question 47