ISRO Past Year Paper (Mechanical) - May 2017 - ISRO, GATE & IES/ESE Mechanical Previous Year Solved Papers - Mechanical Engineering

 Page 1


ISRO Scientist or Engineer Mechanical May 2017
               
              
               
 
  
.
Page 2


ISRO Scientist or Engineer Mechanical May 2017
               
              
               
 
  
.
Mechanical
Instructions
For the following questions answer them individually
Question 1
A beam is fixed at one end and is vertically supported at the other end. What is the degree of statical indeterminacy?
A    1
B    2
C    3
D    4
Answer: A
Question 2
In a gas turbine power plant, reheating of gases between high pressure and low pressure turbine stages will
A    Improve turbine output
B    Decrease turbine output
C    Increase compressor work
D    Decrease compressor work
Answer: A
Question 3
The resultant of two forces acting at 60° is 7 N and when acting at right angles is . The forces are
A    25 N and 9 N
B    
3 N and  N
C    3 N and 5 N
D    
 N and  N
Answer: C
Question 4
The metal removal rate in abrasive jet machining process is
A    high
B    very high
C    low
D    very low
Answer: C
N
3 4
5
3 5
  
.
Page 3


ISRO Scientist or Engineer Mechanical May 2017
               
              
               
 
  
.
Mechanical
Instructions
For the following questions answer them individually
Question 1
A beam is fixed at one end and is vertically supported at the other end. What is the degree of statical indeterminacy?
A    1
B    2
C    3
D    4
Answer: A
Question 2
In a gas turbine power plant, reheating of gases between high pressure and low pressure turbine stages will
A    Improve turbine output
B    Decrease turbine output
C    Increase compressor work
D    Decrease compressor work
Answer: A
Question 3
The resultant of two forces acting at 60° is 7 N and when acting at right angles is . The forces are
A    25 N and 9 N
B    
3 N and  N
C    3 N and 5 N
D    
 N and  N
Answer: C
Question 4
The metal removal rate in abrasive jet machining process is
A    high
B    very high
C    low
D    very low
Answer: C
N
3 4
5
3 5
  
.
Question 5
The air inside a space capsule is maintained at the required condition by passing it through a set of heat exchangers. The heat
exchangers are designed such that the humid air passing through them is cooled and partial condensation of the water vapour
occurs. On a psychrometric chart, this process appears as a line which is
A    Horizontal to the left
B    Vertical downwards
C    Diagonal downwards to the left
D    Diagonal upwards to the right
Answer: C
Question 6
Two bolts A and B of same material and length are subjected to identical tensile load. If the elastic strain energy stored in bolt A is 16
times that of the bolt B and the mean
diameter of bolt A is 13 mm, the mean diameter of bolt B (in mm) is
A    52
B    36
C    24
D    16
Answer: A
Question 7
The source of energy in ultrasonic machining process is
A    Mechanical
B    Electrical
C    Electric spark
D    None of these
Answer: A
Question 8
A turbine develops 500 kW power under a head of 100 m at 200 rpm. What would be its normal speed under a head of 81 m?
A    100 rpm
B    180 rpm
C    1800 rpm
D    162 rpm
Answer: B
  
.
Page 4


ISRO Scientist or Engineer Mechanical May 2017
               
              
               
 
  
.
Mechanical
Instructions
For the following questions answer them individually
Question 1
A beam is fixed at one end and is vertically supported at the other end. What is the degree of statical indeterminacy?
A    1
B    2
C    3
D    4
Answer: A
Question 2
In a gas turbine power plant, reheating of gases between high pressure and low pressure turbine stages will
A    Improve turbine output
B    Decrease turbine output
C    Increase compressor work
D    Decrease compressor work
Answer: A
Question 3
The resultant of two forces acting at 60° is 7 N and when acting at right angles is . The forces are
A    25 N and 9 N
B    
3 N and  N
C    3 N and 5 N
D    
 N and  N
Answer: C
Question 4
The metal removal rate in abrasive jet machining process is
A    high
B    very high
C    low
D    very low
Answer: C
N
3 4
5
3 5
  
.
Question 5
The air inside a space capsule is maintained at the required condition by passing it through a set of heat exchangers. The heat
exchangers are designed such that the humid air passing through them is cooled and partial condensation of the water vapour
occurs. On a psychrometric chart, this process appears as a line which is
A    Horizontal to the left
B    Vertical downwards
C    Diagonal downwards to the left
D    Diagonal upwards to the right
Answer: C
Question 6
Two bolts A and B of same material and length are subjected to identical tensile load. If the elastic strain energy stored in bolt A is 16
times that of the bolt B and the mean
diameter of bolt A is 13 mm, the mean diameter of bolt B (in mm) is
A    52
B    36
C    24
D    16
Answer: A
Question 7
The source of energy in ultrasonic machining process is
A    Mechanical
B    Electrical
C    Electric spark
D    None of these
Answer: A
Question 8
A turbine develops 500 kW power under a head of 100 m at 200 rpm. What would be its normal speed under a head of 81 m?
A    100 rpm
B    180 rpm
C    1800 rpm
D    162 rpm
Answer: B
  
.
Question 9
A solid rod of 12 mm diameter was tested for tensile strength with the gauge length of 50 mm. Final length = 80 mm; Final diameter =
4 mm; Yield load = 1130 N. What is the nearest yield stress and % reduction in area respectively?
A    10 MPa and 10%
B    90 MPa and 90%
C    10 MPa and 90%
D    90 MPa and 10%
Answer: C
Question 10
When water at  is heated, its specific volume under standard atmosphere
A    First increases then decreases
B    First decreases then increases
C    Increases steadily
D    Decreases steadily
Answer: B
Question 11
A spherical joint has —————— degree (s) of freedom.
A    One
B    Two
C    Three
D    Four
Answer: C
Question 12
Isometric projection of a sphere is
A    Circle
B    Ellipse
C    Hyperbola
D    Parabola
Answer: A
Question 13
ABC inventory control focuses on those
A    Items not readily available
0 C
°
  
.
Page 5


ISRO Scientist or Engineer Mechanical May 2017
               
              
               
 
  
.
Mechanical
Instructions
For the following questions answer them individually
Question 1
A beam is fixed at one end and is vertically supported at the other end. What is the degree of statical indeterminacy?
A    1
B    2
C    3
D    4
Answer: A
Question 2
In a gas turbine power plant, reheating of gases between high pressure and low pressure turbine stages will
A    Improve turbine output
B    Decrease turbine output
C    Increase compressor work
D    Decrease compressor work
Answer: A
Question 3
The resultant of two forces acting at 60° is 7 N and when acting at right angles is . The forces are
A    25 N and 9 N
B    
3 N and  N
C    3 N and 5 N
D    
 N and  N
Answer: C
Question 4
The metal removal rate in abrasive jet machining process is
A    high
B    very high
C    low
D    very low
Answer: C
N
3 4
5
3 5
  
.
Question 5
The air inside a space capsule is maintained at the required condition by passing it through a set of heat exchangers. The heat
exchangers are designed such that the humid air passing through them is cooled and partial condensation of the water vapour
occurs. On a psychrometric chart, this process appears as a line which is
A    Horizontal to the left
B    Vertical downwards
C    Diagonal downwards to the left
D    Diagonal upwards to the right
Answer: C
Question 6
Two bolts A and B of same material and length are subjected to identical tensile load. If the elastic strain energy stored in bolt A is 16
times that of the bolt B and the mean
diameter of bolt A is 13 mm, the mean diameter of bolt B (in mm) is
A    52
B    36
C    24
D    16
Answer: A
Question 7
The source of energy in ultrasonic machining process is
A    Mechanical
B    Electrical
C    Electric spark
D    None of these
Answer: A
Question 8
A turbine develops 500 kW power under a head of 100 m at 200 rpm. What would be its normal speed under a head of 81 m?
A    100 rpm
B    180 rpm
C    1800 rpm
D    162 rpm
Answer: B
  
.
Question 9
A solid rod of 12 mm diameter was tested for tensile strength with the gauge length of 50 mm. Final length = 80 mm; Final diameter =
4 mm; Yield load = 1130 N. What is the nearest yield stress and % reduction in area respectively?
A    10 MPa and 10%
B    90 MPa and 90%
C    10 MPa and 90%
D    90 MPa and 10%
Answer: C
Question 10
When water at  is heated, its specific volume under standard atmosphere
A    First increases then decreases
B    First decreases then increases
C    Increases steadily
D    Decreases steadily
Answer: B
Question 11
A spherical joint has —————— degree (s) of freedom.
A    One
B    Two
C    Three
D    Four
Answer: C
Question 12
Isometric projection of a sphere is
A    Circle
B    Ellipse
C    Hyperbola
D    Parabola
Answer: A
Question 13
ABC inventory control focuses on those
A    Items not readily available
0 C
°
  
.
B    
Items which consume less money
C    Items which have more demand
D    Items which consume more money
Answer: D
Question 14
How does the viscosity of fluids vary with increase in temperature?
A    Increases for both liquids and gases
B    Increases for liquids, decreases for gases
C    Increases for gases, decreases for liquids
D    Decreases for both liquids and gases
Answer: C
Question 15
It is required to connect two parallel shafts, the distance between whose axes is small and variable. They can be coupled by
A    Universal joint
B    Knuckle joint
C    Sleeve coupling
D    Oldham coupling
Answer: D
Question 16
Under what condition does flow separation take place?
A    
When 
B    
When 
C    
When 
D    
Not a function of 
Answer: A
Question 17
The variety of cast iron which has maximum hardness is
A    Gray iron
B    Malleable iron
C    Ductile iron
D    White iron
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0
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.