Test duration 90 minutes
no. of questions 80
1. For traction applications, the type of motor best suited is
a)Induction motor b)Synchronous motor
c)DC Shunt motor d)DC series motor
2.In simple harmonic motion the acceleration is proportional to
a) Displacement b)Linear Velocity
c) Angular velocity d)Rate of change of angular velocity
3.A vibrometer
a)Indicates vibration amplitude b)Indicates Vibration Frequency
c)Indicates mature of vibrations d)Only indicates second and above harmonics
4.At node of the shaft
a)The vibrations are minimum b)The vibrations are maximum
c)The vibrations are average d)The vibrations are zero
5.Match list I with list II and select the correct answer using the codes given below the lists.
List I(Match property) List II(Related to)
A.Malleability 1.Wire drawing
B.Hardness 2.Impact loads
C.Resilience 3.Cold Rolling
D.isotropy 4.Indentation
5.Direction
A B C D
1)4 2 1 3
2)3 4 2 5
3)5 4 2 3
4)3 2 1 5
6.The cutting speed of the tool in a mechanical shaper is
a)Maximum at the beginning of the cutting stroke
b)Maximum at the end of the cutting stroke
c)Maximum at the middle of the cutting stroke
d)Minimum at the middle of the cutting Stroke
7.Which is not correct statement about the function of flux in brazing
a)To avoid thermal distortion and cracking
b)To dissolve surface oxide coatings which have formed prior to brazing
c)To prevent oxides from forming during the brazing operation on both the base metal and the
brazing material
d)to facilitate the wetting process by reducing the viscosity of the melt.
8.Investment casting is used for
a)Shapes which are made by difficulty using complex patterns in sand casting
b)Mass production
c)Shapes which are complex and intricate and can't be cast by any other method
d)There is nothing like investment casting
9.internal and external threads can be produced on tapered\ surfaces conveniently by
a)universal milling machine b)plano miller
c)planetary milling machine c)lathe
10.Optical square is
a)Engineer's square having shock and blade set at 90 degree
b)A constant deviation prism having the angle of deviation between the incident ray and reflected ray,equal to 90degree
c)A constant deviation prism having the angle of deviation between the incident ray and reflected ray,equal to 45degree
d)Used to produce interference fringes
11.A master gauge is
a)A new gauge
b)An international reference standard
c)A Standard gauge for checking accuracy of gauges used on shop floors
d)A gauge used by experiences technicians
12. Dimension of the hole is 50 +0.002mm and shafft is 50 +0.02mm.The minimum clearance is
-0.00 +0.00
a)0.02mm b)0.00mm
c)-0.02mm d)0.01mm
13.Two cutters are mounted on the arbor so that two faces are machined simultaneously in
a)Gang milling b)straddle milling
c)pendulum milling d)Profile Milling
14.The main alloying elements in high speed in order of increasing proprtion are
a)vanadium,Chromium,Tungsten b)Tungsten,titanium,Vanadium
c)Chromium,Titanium,Vanadium d)Tungsten,Chromium,Titanium
15.Surface roughness on a drawing is represented by
a)Triangles b)Circles
c)Squares d)Rectangles
16. A husband and wife appear in an interview for two vacancies for same post.The probability
of husband getting selected is 1/5 while the probability of wife getting selected is 1/7.Then
the probability that anyone of them getting selected is
a)11/35 b)12/35
c)1/35 d)34/35
17. Cylindrical parts are held on planer by
a)v-blocks and arrestors b)Angle plates
c)V-block,T-bolts and clamps c)T-bolt and clamps
18.Expressing a dimension as 25.3+0.05 mm is the case of
-0.05
a)Unilateral tolerance b)Bilateral tolerance
c)Limiting dimensions c)All of the above
19.In comparison to an open-loop system a closed loop system is
a)More stable b)More accurate
c)More complex d)All of the above
20.The Moody diagram is shown in Fig. The friction factor
for turbulent flow ina smooth pipe is given by curve
a)A b)B
c)E d)C
21.A piping system consists of three pipes arranged in series, the lengths of thr pipes are 1200m,
750m and 600m and diameters 750mm, 600mm, 450mm respectively.
Transform the system to an equivalent 450mm diameter pipe
a)671.3m b)771.3m
c)871.3m d)971.3m
22.Friction drag is generally larger than the pressure drag in
a)Flow past a sphere b)Flow past a thin sheet
c)Flow past an airfoil d)Flow past a cylinder
23.If D is the diameter of impeller at inlet,w is the width of impeller at inlet and Vf is the velocity
of flow at inlet, then discharge through a centrifugal pump is equal to
a)pi*D*vf b)D*Vf*w
c)pi*D*Vf*w d)pi*D*w
24.Cavitation parameter is defined by
a)pv-P/(rho*sq(v)/2)
b)patm-Pv/(rho*sq(v)/2)
c)p-Patm/(rho*sq(v)/2)
d)p-Pv/(rho*sq(v)/2)
25.The maximum thickness of boundary layer in a pipe of radius R is
a)0.1R b)0.22R
c)0.5R d)R
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