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SSC JE 2019 - 20 technical Quiz 54
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Question 1
Match the following ⇒ 1 - 2 - 3 - 4 : ________-
List – A
1) R -12
2) Ammonia
3) R-22
4) R-11
List – B
A) Industrial system
B) Air conditioning
C) Centrifugal compressor
D) Food freezer
Question 2
An inventor claims to have designed a heat engine which absorbs 1500 kJ and 150 kJ of energy as heat from reservoir at 1000 K and 300 K receptively and rejects 600 kJ energy as heat to reservoir at 600 K. It delivers 1050 kJ work. Judge whether the claim is acceptable or not.
Question 3
The critical pressure ratio for maximum discharge in steam nozzle is __________, where γ is the isentropic index.
Question 4
Calculate the number of instantaneous centers of rotation for an 8 - link mechanism?
Question 5
A thin-cylindrical pressure vessel, having diameter D and wall thickness t, is subjected to an internal pressure of ‘p’. The expression for volumetric strain will be______.
Where,
Where,
Question 6
A cylinder pin of diameter 
mm is assembled into a hole of diameter 
mm. Find out the allowance provided in this assembly (in mm).
mm is assembled into a hole of diameter mm. Find out the allowance provided in this assembly (in mm).
Question 7
In a metal cutting operation,
VS = velocity of chips relative to workpiece
V = cutting velocity
VC = Velocity of chips relative to tool
What is the ratio of 
?
Question 8
The type of locator used to prevent jamming during locating of a work piece is
Question 9
Two castings of the same metal have the same surface area. One castings is in the form of a sphere and the other is a cube. What is the ratio of the solidification time for the sphere to that of the cube?
Question 10
Calculate the fraction of volume of a unknown metal object 
floating above the surface of mercury 
?
floating above the surface of mercury ?
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