AP PGECET 2014 Results: 17th June,2014
AP PGECET 2014 Mechanical Answer Key held on 27/05/2014
AP PGECET 2014 Mechanical Answer Key exam held on 27th May,2014 provided below.AP PGECET Exam held on 27th May,2014 for mechanical engineering candidates from 02:00 PM to 04:00 PM.As per the review,this year Mechanical engineering paper was little bit tough compared to the previous year. Many candidates are being waiting for AP PGECET 2014 Mechanical Answer Key eagerly. We are providing AP PGECET 2014 Answer Key for understanding purpose only. After checking their answers with the corresponding questions answers candidates can come to an estimation of the marks. Kindly go through AP PGECET 2014 Mechanical Answer Key if required.
PGECET 2014: Postgraduate Engineering Common Entrance Test
AP PGECET 2014 Results: 17th June,2014
Discipline: PGECET 2014 Mechanical Answer Key
1).The Steel Widely used for motor car crankshafts is ___________
Ans: Chrome steel
2).Pearlite consists of ___________
Ans: 13% cementite and 87% ferrite
3).In the Austempering process of heat treatment, austenite changes into ___________
Ans: Bainite
4).Babbit metal contains ___________
Ans: 88% tin, 4% copper, and 8% antimony
5).18/8 stainless steel consists of __________
Ans: 18% chromium and 8% nickel
6).Which of the following statements is correct? __________
a).The Product produced by Blast furnace is called cast iron
b).The Pig iron is the name given to the product produced by Cupola
c).The Cast Iron has high tensile strength
d).The Chilled cast iron has no graphite
Ans: The Chilled cast iron has no graphite
7).The presence of hydrogen in steel causes ___________
Ans: Embrittlement
8).In forehand gas welding operation, the angle between the rod and work is kept around __________
Ans: 30 degrees
9).Rankine’s theory of failure is applicable to ____________
Ans: Brittle materials
10).According to Unwin’s formula, the relationship between the diameter of the rivet (d) and thickness of cylinder wall (t) is ___________
Ans: d = 6√t
11).If A= 1/x (Matrix -1 2 2; 2 -1 2; 2 2 -1) is orthogonal, the value of x is __________
Ans: Plus or minus 3
12).If the Matrix A = (5 2; 0 k) is a root of the polynomial f(x) = x2-7x+10, then the value of k is ________
Ans: 2
13. If A = Matrix (1 0; 2 4), then the Eigen values of “4(A Inverse) + 3A+2I” are _______
Ans: 9, 15
14).The System in which the second bin contain the number of units equal to Reorder point, is called __________
Ans: Two bin system
15).Classification of items based on the closing inventory values is called ___________
Ans: XYZ Classification
16).When order quantity increases, the ordering cost will ___________
Ans: increase
17).Fulkerson’s rule is connected with ___________
Ans: numbering the event in PERT/CPM
18).Critical activities are those for which _________
Ans: float = 0
19).Simulation is basically a technique which is used for __________
Ans: Testing Alternatives
20).The value of base variable in the assignment model is __________
Ans: 1 or 2
21).Processing time can be reduced by the addition of ___________
Ans: a co-processor
22).The techniques, which enables the designer to mould and shape, rather than construct an object using a series of lines is ____________
Ans: Solid modelling
23).The display of a volume model that shows all of its edges is called ____________
Ans: wire-frame
24).What ties CAD/CAM work-station together ___________
Ans: Graphics workstation
25).Autocollimator is used for _____________
Ans: Angular measurement
26).The fit on a hole-shaft system is specified as 117-s6.The type of fit is ____________
Ans: thickness of clearance (interference fit)
27).A Sine bar is specified by __________
Ans: the center distance between the two rollers
28).The least count of a vernier caliper having 25 divisions on vernier scale, matching with 24 divisions of main scale (1 main scale div = 0.5 mm) is __________
Ans: 0.02 mm
29).Expressing a dimension as 32.5/32.3 mm is the case of __________
Ans: limiting dimensions
30).High damping reduces the transmissibility if the non-dimensional frequency ratio w/wn (w=forcing frequency, wn = natural frequency) ___________
Ans: is greater than √2
31).Critical or whirling speed is the speed at which the shaft tends to vibrate violently in __________
Ans: Transverse direction
32).Porosity of welded joint is due to _________
Ans: poor base metal
33).In gas welding, flame temperature of the oxyacetylene gas used is ____________
Ans: 3200 degree centigrade
34).In Ultrasonic welding thickness of metal is limited to ______________
Ans: 3 mm
35).In forehand gas welding operation, the angle between the rod and work is kept around _____________
Ans: 30 degrees
36).Oxygen to acetylene ratio in case of carburizing flame is ________
Ans: 0.9:1
37).Plain and butt welds can be used for sheets having thickness approximately __________
Ans: 25 mm
38).Multi spot welding process is ___________
Ans: Projection welding
39).Number of zones of heat generation in spot welding are _____________
Ans: 5
40).Fluidity is greatly influenced by ___________
Ans: pouring temperature
41).The most suitable material for die casting is __________
Ans: cast iron
42).Match plate pattern is used in __________
Ans: machine moulding
43).Sprue in casting refers to ___________
Ans: Vertical passage
44).Blue colour on the pattern is marked for ________
Ans: never used in pattern making operation
45).Investment casting uses pattern made of __________
Ans: wax
46).For drawing operation, the best suited press is ________
Ans: toggle press
47).Stretch forming is the operation ________
Ans: of producing contours in sheet metal end of bearing previously roll formed section
48).The major problem in hot extrusion is __________
Ans: wear and tear of die
49).Seamless tube can be produced by ___________
Ans: piercing
50).In Press operation, the size of the pierced hole is independent of the size of ___________
Ans: punch
51).In drawing operation, the metal flows due to ___________
Ans: plasticity
52).In a framed structure, the force on the member BC is ___________
Ans: 2w/3 (tension)
53).A steel bar of 5 mm diameter is heated from 15 to 40 degree centigrade, and is free to expand. The bar will induce ________
Ans: no stress
54).When a bar is cooled to -5 degree centigrade, it will develop __________
Ans: tensile stress
55).The value of 1 mm of HG is equal to __________
Ans: 133.33 N/m2
56).One kg of ethylene ( ) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and ________ kg of water or steam
Ans: 9/7
57).Charles’s law states that all perfect gases change in volume by __________ of its original volume at 0 degree centigrade for every 1 degree centigrade change in temperature, when pressure remains constant
Ans: 1/273 th
58).A cycle consisting of ___________ and two isothermal processes is known as Stirling cycle
Ans: two constant volume
59).A path 1-2-3 is given.A system absorbs 100 KJ as heat and does 60 KJ of work while along the path 1-4-3; it does 20 KJ of work. The heat absorbed during the cycle 1-4-3 ___________
Ans: +60KJ
60).The general gas energy equation is ___________
Ans: dQ=dU + dW
Where, dQ = Heat supplied
dU = Change in Internal energy
dW = Work done on heat units
61).A particle moves along a straight line such that distance (x) traversed in‘t’ seconds is given by x=t2*(t-4), the acceleration of the particle will be given by the equation ________
Ans: 6t-8
62).The force induced in string BC due to load W shown in figure given below is (check your Mechanical question paper for figure) is _______
Ans: W cosec (theta)
63).The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC.The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is __________
Ans: (0.375 v22 )/2g
64).The coefficient of discharge for an external mouthpiece depends upon _________
Ans: length of mouthpiece
65).For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area _____
Ans: Passes through a maxima
66).The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is _____
Ans: Schmidt number
67).Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is _______
Ans: less than 1
68).A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will _______
Ans: Decrease
69).The height of a mercury barometer is 75cm at sea level and 50cm at the top of a hill. Ratio of density of mercury to that of air is 104.The height of the hill is _________
Ans: 2.5 km
70).The pressure at the bottom of a tank containing a liquid does not depend on _______
Ans: Area of the bottom surface
71).If pressure at half the depth of a lake is equal to ⅔ pressure at the bottom of the lake, and then what is the depth of the lake? _______
Ans: 20m
72).When the diameter of shaft is doubled; torque transmitting capacity will be increased by _______
Ans: 8 times
73).The moment diagram for a cantilever beam carrying a concentrated load at its free end, will ________
Ans: Triangle
74).The maximum diameter of the hole that can be punched from a plate of maximum shear stress ¼ th of its maximum crushing stress of punch, is equal to (Where t=Thickness of the plate): _________
Ans: 4t
75).A vertical column has two moments of inertia (i.e., Ixx and Iyy).The column will tend to buckle in the direction of the _______
Ans: minimum moment of inertia
76).A semi circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-circular disc and horizontal surface is µ.This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will __________
Ans: Slant down towards direction of pull
77).The potential energy of a vertically raised body is ___________ the Kinetic energy of a vertically falling body.
Ans: equal to
78).The value of Stefan-Boltzmann constant in SI unit is __________
Ans: 5.6697 * 10-8 W/m2.K4
79).The state of an Ideal gas was changed three times at three different temperatures. The diagram represents three different isothermal curves. Which of the following is true about the temperature of the gas _________?
Ans: Q1-2=dU+W1-2
80).The state of an ideal gas was changed three times at three different temperatures. The diagram represents three different isothermal curves. Which of the following is true about the temperature of the gas ______?
Ans: T1˂T2˂T3
81).Three containers filled with 1 kg of each water, ice, and water vapour at the same temperature T=0 degree centigrade. Which of the following is true about the internal energy of the substances _______?
Ans: Uice˂Uwater˂Uvapor
82).A hot object with a temperature T1 is connected to a cool object with a temperature of T2.The object with thermal conductivity ‘k’ is used to conduct heat and has a length ‘L’ with cross-sectional area ‘A’. The rate of heat flow is ________
Ans: kA (T1-T2)/L
83).The state of an ideal gas is changed isothermally from position 1 to position 2 is shown in figure. What is the change in the internal energy of the gas during this process ______?
Ans: ∆U=0
84).An ideal gas undergoes a cyclic process presented by the P-V diagram. Which of the following points has the highest temperature ________?
Ans: D
85).A bimetal plate consists of two materials of different coefficients of thermal expansion. The coefficient of thermal expansion of the top part of the plate is less than the bottom part. If the temperature of the entire plate increases with one of its ends fixed what happens to the plate ________
Ans: Bends up
86).Medium carbon steel contains _________
Ans: 0.3 to 0.5% of carbon
87).Micanite is a form of _________
Ans: Built up mica
88).Copper is completely miscible with ________
Ans: Gold
89).For cutting mild steel, the cutting angle of a chisel should be __________
Ans: 60 degrees
90).Casting defect caused by mixing of two streams of molten metal that are too cold to fuse properly, is __________
Ans: Cold shots
91).The ALU of a computer normally contains a number of high speed storage elements called _________
Ans: Registers
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