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ESE 2019: Technical Mini Mock Quiz-5

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Question 1

Which of the following elements given below determine(s) the maximum attainable, hardness in steel?
[1]. Chromium
[2]. Manganese

[3]. Carbon
[4]. Molybdenum

Select the correct answer using the code given below?

Question 2

Uniform heat generation takes place in a symmetric slab so that heat flows towards both sides in contact with fluid. The zero-grsdient boundary condition occurs at

Question 3

CPM and PERT are concerned with:

Question 4

A machine component is subjected to a flexural stress, which fluctuates between 300 MN/m2 and –150 MN/m2. Taking the yield strength = 0.55 of the ultimate strength, endurance strength = 0.50 of the ultimate strength and factor of safety to be 2, the value of the minimum ultimate strength according to Goodman relation will be

Question 5

Assertion (A): The plastic organic material can be easily shaped or moulded by mechanical action.
Reason (R):It is widely in use as it can be permanently moulded.

Question 6

Direction: The following items consists of two statements; one labelled as ‘Assertion (A)’ and the other as ‘Reason (R)’. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Assertion (A): Most of the materials exist in single crystal.
Reason (R): Sugar is a single crystal material.

Question 7

The propeller of an aircraft fitted with electric motor operates at 1400 rpm. What will be its angular speed in radians/second?

Question 8

From the performance characteristic curve of centrifugal pump, which information is correct?

i) efficiency of pump should be maximum 65%
ii) discharge of pump to take place around 16 lps
iii) operating head discharge should be maximum 35m

Question 9

If two similar dimensional parallel plates are welded using butt welding with electric arc, then on change of plate thickness, the welding will now be done by

Question 10

The final coordinates in xyz axes on changing rotation order when u is rotated by -90o about +z and -90 about +y, if u being [0 1 0].

Question 11

The commercially available biomass fuel is not:

Question 12

Nuclear energy is not preferred over wind energy because of presence of:
i. wind mills
ii. nuclear radiation
iii. nuclear waste

Question 13

The state of stress at a point when completely specified enables one to determine the
1) maximum shearing stress at the point
2) stress components on any arbitrary plane containing that point
Which of the above is/are correct?

Question 14

If primary direct crank of reciprocating engine makes θ with line of stroke, then what angle will the secondary direct crank makes with the line of stroke?

Question 15

A: All isentropic processes are reversible.
R: Reversible adiabatic processes are isentropic.
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