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ME Quiz - 2

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Question 1

A cross flow type air heater has an area of 50 m². The overall heat transfer coefficient is 100 W/m² K and heat capacity of both hot and cold stream is 1000 W/ K. The value of NTU is

Question 2

Match the following products with preferred manufacturing processes:

Question 3

Given that the peripheral speed of the grinding wheel of 100 mm diameter for cylindrical grinding of a steel workpiece is 30 m/s, what will be the estimated rotational speed of the grinding wheel in revolution per minute (rpm)?

Question 4

The slope of isochoric process on T-s diagram will be_____.

Question 5

If 3000 kJ/kg heat is added to the system & work done on the system is 6000kJ/kg, then change in internal energy is given by

Question 6

While cooling, a cubical casting of side 40 mm undergoes 3%, 4% and 5% volume shrinkage during the liquid state, phase transition and solid state, respectively. The volume of metal compensated from the riser is

Question 7

Streamline and equipotential lines in a flow field __________.

Question 8

The pressure at any given point of a non-moving fluid is called the ____________

Question 9

The radiative heat transfer rate per unit area (W/m²) between two plane parallel gray surfaces whose emissivity is 0.9 and maintained at 400 K and 300K is _________.

Question 10

The process of reheating the martensitic steel to reduce its brittleness without any significant loss in its hardness is

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AE & JE Exams Mechanical Engineering

Oct 5AE & JE Exams