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# ESE 2022 ME - Technical Quiz 1

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Question 1

In solar flat-plate collectors, the absorber plate is painted with selective paints. The selectivity is the ratio of

Question 2

In a vapour absorption refrigerator, the temperatures of evaporator and ambient air are 10 °C and 30 °C, respectively. For obtaining COP of 2 for this system, the temperature of the generator is to be nearly

Question 3

The nearest thermal efficiency of Otto cycle(air) with compression ratio 5.5 will be:

Question 4

The total area under the stress-strain curve of a mild steel specimen tested up to failure under tension is a measure of its _________.

Question 5

Calculate the Biot number for a solid cylinder of length 7 cm and radius 5 cm which is made up of a material whose thermal conductivity is 150 W/mK and h = 18 W/m2K

Question 6

The ball-bearing has a life of 5000 hrs. The rated load of the bearing is 60kN while the load on the bearing is 9kN. At what speed (rpm) should the journal revolve to last for 5000hrs.

Question 7

The specific machining energy during the orthogonal turning of MS rod is . The depth of cut, feed, cutting velocity respectively. The main cutting force in N is:

Question 8

S type glass is a ____________.

Question 9

Statement-I: Dynamic RAM uses capacitors to store data.
Statement-II: The data can be accessed faster than Static RAM, but it is more expensive.

Question 10

A shaft has two heavy rotors mounted on it. The transverse natural frequency considering each rotor separately is 100 hz & 200 hz respectively. The lowest critical speed is
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Sep 13ESE & GATE ME
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