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Practice Test: Mechanical Engineering (ME)- 6 - Mechanical Engineering MCQ


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65 Questions MCQ Test - Practice Test: Mechanical Engineering (ME)- 6

Practice Test: Mechanical Engineering (ME)- 6 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Practice Test: Mechanical Engineering (ME)- 6 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Practice Test: Mechanical Engineering (ME)- 6 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Practice Test: Mechanical Engineering (ME)- 6 below.
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Practice Test: Mechanical Engineering (ME)- 6 - Question 1

Question 1 to 5 carry One Mark each

Q.

Even as the --------- else where in the world are struggling, to come out of recession, Indian consumers are splurging on consumer goods and to ----- this growth, companies are investing heavily in various sectors.

Practice Test: Mechanical Engineering (ME)- 6 - Question 2

In the olympic games, the flags of six nations were flown on the masts in the following way. T he flag of
America was to the left of Indian tricolor and to the right of the flag of france. T he flag of australia was on
the right of the indian flag but was to the left of the flag of japan, which was to the left of the flag of china.
Find the two flags which are in the centre.

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 2

India and Australia

[France – America – India –Aus. –Japan – China]

Practice Test: Mechanical Engineering (ME)- 6 - Question 3

From the given equilateral triangle below, A, B and C run along. T he sides in clockwise direction and stop
aft er coming  sides. Which of the following statements is true?

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 3

A is the S–W of B

Practice Test: Mechanical Engineering (ME)- 6 - Question 4

In the following questions, a sent ence has been given in direct/indirect speech.
Nitin said to me, “why don’t you come with us? why do you want to be so unsocial.

Practice Test: Mechanical Engineering (ME)- 6 - Question 5

Direction (5) Spotting the error

/In order to transfer (A)

/ branch licenses for one (B)

/ bank to anot her you require special approval from RBI (C)

/ No error (D).

Practice Test: Mechanical Engineering (ME)- 6 - Question 6

Question 6 to 10 carry Two Marks each

Q.

In an NGO, the daily average ages of 20 illiterate employee is decreased from Rs. 25 to Rs. 10. Thus the
average salary of all the literate (educated) and illiterate employees is decreased by Rs. 10 perday. T he
number of educated employees working in the NGO is :

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 6

Total employees = (25−10)×20/10=30

 Hence number of educated employees  = 30-20 = 10

Practice Test: Mechanical Engineering (ME)- 6 - Question 7

Common Data Question (7-8)

The ratio of the percentage share of Dairy Milk to that of ot her is?

 

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 7

Practice Test: Mechanical Engineering (ME)- 6 - Question 8

If in the next year, Crackle and Dairy Milk decided to join hands and increase their market share from their
combined existing share by 20%. What will be their combined sales if the mark size remains the same?

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 8

Practice Test: Mechanical Engineering (ME)- 6 - Question 9

Simple interest on a certain amount is 9/16 of the principle. If the number represent ing the rate of intersest in percent and time in years be equal. T hen time, for when the principal is lent out is,

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 9

Practice Test: Mechanical Engineering (ME)- 6 - Question 10

A boat sails across a river with a velocity of 10 km/hr. If resultant boat velocity is 14 km/hr, then what is the velocity of river water? 

Practice Test: Mechanical Engineering (ME)- 6 - Question 11

Question 11 to 35 carry One Mark each

Q.

If the probability for A to fail in an examination is .2 and that for B is .3 then the probability that either
A or B fails is

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 11

Practice Test: Mechanical Engineering (ME)- 6 - Question 12

Eigen value of unit ary matrix are always

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 12

T he eigen value of unit ary matrix are always of  unit modulus.

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 13

If    t hen the value of  

______________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 13

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 14

A rigid wheel 1.25 diameter is to be provide with a t hin steel t yre. If the stress in the steel t yre is not
to exceed 140 N/mm2, what is the int ernal diameter of the tyre? Take E = 2 × 105 N/mm2 and
α = 1.2 × 10-5 per oC ________________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 14

Practice Test: Mechanical Engineering (ME)- 6 - Question 15

In case of solution of a two variable linear programming problem by graphical method one constraints line
comes parallel t o the objective function line which one of the following is correct?

Practice Test: Mechanical Engineering (ME)- 6 - Question 16

If 'u' and 'v' the component of velocity in x-direction and y-direction respectively are given u = ax+by and
v = cx + dy then the condition to be satisfy is

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 16

Practice Test: Mechanical Engineering (ME)- 6 - Question 17

T he two links OA and OB are connected by a pin joint at 'O'. If the link OA t urns with angular velocity
1' rad/s in the clockwise direction and th e link OB turns with angular velocity 'ω2' rad/s is the
anticlockwise direction, then the rubbing velocity at the pin joint 'O' is

 

Where r = Radius of the pin at 'O'

Practice Test: Mechanical Engineering (ME)- 6 - Question 18

According to Indian standard specifications, a grey cost iron designated by 'FG200' means that the

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 19

T here is a slab having temperat ure at left and right faces 800 K and 600 K respectively and slab material
having conductivit y k = 20 W/mK at 0°C. Find the mean thermal conductivity for the slab given β = 0.01 per
unit kelvin _________________W/mK


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 19

Practice Test: Mechanical Engineering (ME)- 6 - Question 20

The following sheet metal operat ion induces shear stresses in the part

Practice Test: Mechanical Engineering (ME)- 6 - Question 21

Reduced pressure is

Practice Test: Mechanical Engineering (ME)- 6 - Question 22

Steam coming out of the whistle of a pressure cooker is

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 23

What should be the minimum length two a high strength steel rod of 12.5 mm diamet er so t hat one end
can be t wisted by 30o with respect of the other end, without exceeding a shear stress of 270 N/mm2 given
modulus of rigidity G = 8 × 104 N/mm2

_________________ m


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 23

Practice Test: Mechanical Engineering (ME)- 6 - Question 24

The linear programming is used for opt imization problems which satisfy the following conditions.
(1) Objective function expressed as a linear function of variable
(2) Resources are unlimited
(3) T he decision variable are interrelated and non-negative
Which of the statements is/are correct?

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 25

The dynamic viscosity of a fluid is 1 Poise. What should one multiply to it to get the answer in N-s/m2?


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 25

1 Poise = 1 dyne-s/cm2

Practice Test: Mechanical Engineering (ME)- 6 - Question 26

T he four bar mechanism shown in the given figure
Given OA = 3cm , AB = 5cm, BC = 6 cm and OC = 7cm is a

Practice Test: Mechanical Engineering (ME)- 6 - Question 27

Ball bearing are usually made from

Practice Test: Mechanical Engineering (ME)- 6 - Question 28

For a metallic wall at 200°C a metallic rod prot rudes to the ambient air. The temperat ure at the tip will be
minimum when the rod is made of

Practice Test: Mechanical Engineering (ME)- 6 - Question 29

Blank holding is normally required in

Practice Test: Mechanical Engineering (ME)- 6 - Question 30

When 'd' is the diameter of the molecules of a gas in a confined space, the collision frequency will be
proportional to

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 30

T he collision frerquency is the number of collision experienced by the molecules of gas per second and is given by

Where v = average molecular velocity, d =
diameter of molecules, and N = number of
molecules per c.c.

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 31

A cant ilever beam of span 6m carries a point load of 100 kN at its free end and anot her point load 'W'
at the mid of its length. If the maximum bending moment is stated to be 900 kNm, the load 'W' will have
the value _______________________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 31

Maximum bending moment will occur at the fixed end.

 

Practice Test: Mechanical Engineering (ME)- 6 - Question 32

Free convection flow depends on

Practice Test: Mechanical Engineering (ME)- 6 - Question 33

Straight turning operation was carried out at the same feed using tools

(1) 8 – 8 – 5 – 5 – 25 – 0 (ASA) and
(2) 8 – 8 – 5.5 – 7 – 30 – 0 (ASA).
Which tool will gives a better surface finish ?

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 33

h1 < h2 (1 will give better surface finish)

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 34

A 150 mm long, 12 mm diameter rod is reduced to 11 mm diameter in a single pass straight turning. If the
spindle speed is 400 rpm and feed rat e is 200 mm/min, determine the material removal rate

____________________ mm3/ min


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 34

Mat erial removal rat e MRR = Vfd
Where,

Practice Test: Mechanical Engineering (ME)- 6 - Question 35

In the vander wall's equation

T he greater the value of constant equation

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 35

T he vander wall's const ant (a) is a measure of the vander wall's force s of cohesion existing between the molecules of a give gas the greater the value the higher is the strength of the vander wall's forces, also the greater the value of 'a' the
grea ter is the case with whi ch a gas can be
liquefied.

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 36

Question 36 to 65 carry Two Marks each

Q.

A 60 mm diameter shaft transmitting a torque of 4 kNm is also subjected to an axial tension of 180 kN.
T he maximum tensile stress is

___________________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 36

Tensile stress due to axial tension

Shear stress at shaft surface due to torque

Practice Test: Mechanical Engineering (ME)- 6 - Question 37

The momentum correction factor is given by

Practice Test: Mechanical Engineering (ME)- 6 - Question 38

Consider the following statements
1. In a kinematic inversion, the relative motions between links of the mechanism changes as different
links are made t h e frame by turns.
2. An ellipt ical trammel is a mechanism with three prismatic pairs and one revolute pair. Which of the
statements given above is/are correct?

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 38

T hrough the process of inversion the relative motions between the various links is not changed in any manner but their absolute mot ions may be changed drastically.
Elliptical t rammels hav e t wo sliding pairs and two turning pairs. It is an instrum ent used for drawing ellipse.

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 39

A shaft rotat ing at constant speed is subjected to variable load. The bearings support ing the shaft are subjected to stationary equivalent radial load of 3kN for 10 percent of time, 2 kN for 20 per cent of time, 1 kN for 30 per cent of time and no load for remaining time of cycle. If the tot al life expected for the bearing is 20 × 106 revolution at 95 per cent reliability, dynamic load rat ing of the ball bearing is

__________________ kN


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 39

We know,

The equivalent radial load

Practice Test: Mechanical Engineering (ME)- 6 - Question 40

A plastic pipe (K = 0.5 W/mK) carries a fluid such that the convective heat transfer coefficient is 200 W/
m2K. The average fluid temperat ure is 100°C. T he pipe has an inner diameter of 3 cm and outer diameter
4 cm. If the heat transfer rat e t hrough the pipe per unit length is 450 W/m, calculate the external pipe
temperat ure

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 40

41.23 = 100 – T2
T2 = 58.77 °C

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 41

A mild steel workpiece is being machined by two different tools 'A' and 'B' under identical machining conditions. The tool life equation for these tools are
Tool A VT0.31 = 43.3
Tool B VT0.43 = 89.5
Where V and T are in m/s, respectively. Determine the cutting speed above which tool B will give better tool
life

__________________ m/s


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 41

At break-even speed V* both tool gives the same tool life

Practice Test: Mechanical Engineering (ME)- 6 - Question 42

The net work input required for compressor with increase in clearance volume

Practice Test: Mechanical Engineering (ME)- 6 - Question 43

If hot water and cold water are mixed, then the entropy of the system will be

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 44

A solid shaft is subjected to a bending moment of 300 Nm and a twisting moment of 225 Nm. What should
be the diameter of the shaft with a factor of safety of 2 according to the maximum principal strain theory?
Take σy = 210 N/mm2 and μ = 0.25

______________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 44

M = 300 N.m
T = 225 N.m

With a factor of safety, the condition to be satisfied is

Practice Test: Mechanical Engineering (ME)- 6 - Question 45

Laminar flow takes place in the circular tube. At what distance form the boundary does the local velocity
equal to the average velocity ?

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 45

Practice Test: Mechanical Engineering (ME)- 6 - Question 46

Consider the following statements
1. Corioli’s component of acceleration is a component of translatory acceleration.
2. If the relative motion between two links of a mechanism is pure sliding, then the relative instantaneous
centre for these two links does not exist.
Which of the statements given above is/are correct?

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 46

Its unit is m/s2. T herefore translatory acceleration (at = 2vω).
It does not exist at inf init y distance. Kennedy theorem says number of instantaneous centre =

n(n-1)/2

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 47

According to Von–Mises criterion, the shear yield stress of the material is 346.56 MPa t hen what will
be t he yield strength of this material in tension assume unidirectional loading _____________MPa


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 47

Von – Mises criterion gives

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 48

Water flows a 20 mm I.D. at a rat e of 0.02 kg/s entering at 20°C. T he tube is wrapped from outside by an
elect ric heat ing element that produces a uniform flux of 18 K W/m2. If the exit tempe rat ure of water is
50°C, find the length of the pipe needed for this process. Given water propert ies at 35°C, ρ = 997 kg/m3, Cp= 4180 J/kg-K, μ = 820 × 10–6 Ns/m2 and k = 0 .808 W/mK ___________________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 48

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Practice Test: Mechanical Engineering (ME)- 6 - Question 49

A tube is orthogonally machined in a lathe to reduce its length under the following conditions. Outside diameter of the tube 100 mm, inside diameter of the tube 96 mm, RPM of the workpiece 120, longitudinal feed 0.5 mm/ rev, cutting ratio 0.3, tangential force 800 N, axial force 600 N. The total power consumption

_______________W.


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 49

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 50

100 cubic-meter o f air at 20°C and 60% RH (saturat ion pressure = 0.02384 bar) is heated per minute by
means of hot water spray supplied at 30°C. T he temperature of air coming out is 3 0°C and 50% R.H.
(saturat ion pressure = 0.04325 bar). T he heat added to the air will be, if atmospheric pressure is 1.033 bar

_____________kW


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 50

Practice Test: Mechanical Engineering (ME)- 6 - Question 51

A bell coleman refrigeration cycle works between pressure limits of 1 bar and 5 bar. T he adiabatic efficiency of compression is 85% and expansion is 90%. Find out the tonnage capacity when the air flow rat e is 1 kg/sec. T he ambient temperat ure is 27°C and refrigerat or temperat ure is 0°C

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 51

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 52

A 100 mm diameter safet y valve is to be designed to blow off at a gauge pressure of 1.2 N/mm2. T he
valve is held in position by a 180 mm diameter close coiled compression helical spring whose init ial
compression is 25 mm. What is the number of turn required if the shear stress is not to exceed 80 N/
mm2 if G = 8.5 × 104 N/mm2

__________________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 52

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 53

A pelton wheel 2.5 m diameter operates under the following conditions

Find the hydraulic efficiency _________________%


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 53

Practice Test: Mechanical Engineering (ME)- 6 - Question 54

A cantilever beam is loaded as shown below

T he deflect ion of the free end will be

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 54

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 55

A pipe carry water has a tapering section where the diameter changes from 10.0 cm at section 'A' to 8.0 cm
at section 'B'. T he flow is from 'A' to 'B' and the pressure and elevation at t hese section are as follow

Find the discharge in the pipe

 _______________________ L/s.


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 55

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 56

A thick walled cop per cylinder has an inside radius of 1 cm and an outside radius of 2 cm. T he inner and
outside surfaces are held at 310°C and 290°C respectively. Assume 'k' varie with temperature as k = 371.9
[1 – 9.25 × 10–5(T – 150)] W/mK. Determine the heat lost per unit length

_______________ kW/m


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 56

 

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 57

T he rat io of the solidification time of two cylindrical risers of sizes 30 cm in diameter × 60 cm in height and
60 cm in diameter × 30 cm in height subjected to identical conditions of cooling


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 57

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 58

In an experiment to determine the thermal conductivity of a long solid 2.5 cm diameter rod, its base is place
in a furnace with a large portion of it projecting in to the room air at 22°C. Aft er stea dy state condition
prevail, t he temp eratrue at two point s, 10 cm apar t are found to be 110°C and 85°C respectively. T he
convective heat t ransfer coefficient between the rod surface and the surrounding air is 28.4 W/m2K.
Determine the t hermal conductivit y of the rod material _________________ W/mK


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 58

Practice Test: Mechanical Engineering (ME)- 6 - Question 59

T he vapour compression Refrigerat ion cycle is represented as shown in figure below with state (1) being
the exit of the evaporator. T he coordinate system used in this figure is

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 59

I f is (P - h ) di agram e be cause in v apo ur
compression cycle condenser and evaporation pro cess will work at con stant pressure, and throt tling process will work at isenthalpic process and in compression pressure and enthalpy both going to increase in diagrame

1 – 2 Compression process
2 – 3 Evaporation process (constant pressure)
3 – 4 T hrottling process (enthalpy constant )
4 – 1 Evaporat ion process.

Practice Test: Mechanical Engineering (ME)- 6 - Question 60

The atmospheric air at 760 mm of Hg. dry bulb temperat ure 15°C and wet bulb temperat ure 11°C enters a
heating coil whose temperature is 41°C. If the by-pass factor of the heating coil is 0.5. T hen what will be the
dry bulb temperat ure of air leaving the coil 2.

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 60

If a sam ple o f un satur at ed air co nt aini ng superheated water vapor is cooled at constant pressur e. The partial pressure   (Pv ) of each constituent remain constant untill the wate vapour reaches the saturat ed state as shown by point 'B'.
At this poin t 'B' the first drop of dew will be
formed and hence t he temperat ure at point B is called dew point temperature.

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 61

T he modulus pa rt of (1 + i)8 is ______________


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 61

Practice Test: Mechanical Engineering (ME)- 6 - Question 62

If a vector    The divergence of vector  is

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 62

*Answer can only contain numeric values
Practice Test: Mechanical Engineering (ME)- 6 - Question 63

Using Sim pson’s 1/3 rd rule with step size of .1, the value of  is _______________.


Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 63

Practice Test: Mechanical Engineering (ME)- 6 - Question 64

The solution of the differential equation  is

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 64

Practice Test: Mechanical Engineering (ME)- 6 - Question 65

Find the v alue of λ and μ for which system of equations

x + λy + z = 3
x + 2y + 2z = μ
x + 5y + 3z = 9
has infinit e consistent solution.

Detailed Solution for Practice Test: Mechanical Engineering (ME)- 6 - Question 65

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