In a vapour compression refrigeration system, liquid to suction heat exchanger is used to

1.  keep the COP constant

2.  prevent the liquid refrigerant from entering the compressor

3.  subcool the liquid refrigerant leaving the condenser

4.  subcool the vapour refrigerant from the evaporator

View Answer  
4
Correct Answer :

subcool the liquid refrigerant leaving the condenser


Explanation :
No Explanation available for this question

A steel seam pipe 10 cm inner diameter and 11 cm outer diameter is covered with an insulation having a thermal conductivity of 1 W/mK. If the convective heat transfer coefficient between the surface of insulation and the surrounding air is 8 W/m2K, the critical radius of insulation is

1.  10 cm

2.  11cm

3.  12.5 cm

4.  15 cm

View Answer  
4
Correct Answer :

12.5 cm


Explanation :
No Explanation available for this question

Which of the following is a pressure compounded turbine

1.  Parsons

2.  Curtis

3.  Rateau

4.  all the three

View Answer  
4
Correct Answer :

Rateau


Explanation :
No Explanation available for this question

When the speed of a centrifugal pump is doubled, the power required to drive thepump will

1.  increase 8 times

2.   increase 4 times

3.  double

4.   remain the same

View Answer  
4
Correct Answer :

increase 4 times


Explanation :
No Explanation available for this question

Global warming is caused by

1.  ozone

2.  Carbon dioxide

3.  Nitrogen

4.  carbon monoxide

View Answer  
4
Correct Answer :

Carbon dioxide


Explanation :
No Explanation available for this question

Navier Strokes equation represents the conservation of

1.  energy

2.  mass

3.  pressure

4.  momentum

View Answer  
4
Correct Answer :

momentum


Explanation :
No Explanation available for this question

In  a   bi-axial  stress  problem,  the  stresses  in  x and  y directions  are σx = 200 MPa and σy = 100 MPa. the maximum principal stress in MPa, is

1.  50

2.  100

3.  150

4.  200

View Answer  
4
Correct Answer :

200


Explanation :
No Explanation available for this question

The ratio of tension on the tight side to that on the slack side in a flat belt drive is:

1.  proportional to the product of coefficient of friction and lap angle

2.  an exponential function of the product of coefficient of friction and lap angle

3.  proportional to the lap angle

4.   proportional to the coefficient of friction

View Answer  
4
Correct Answer :

an exponential function of the product of coefficient of friction and lap angle


Explanation :
No Explanation available for this question

The natural frequency of an undamped vibrating system is 100 rad/s. A damper with a damping factor of 0.8 is introduced into the system. The frequency of vibration of the damped system, in rad/s, is

1.  60

2.  75

3.  80

4.  100

View Answer  
4
Correct Answer :

60


Explanation :
No Explanation available for this question

A steel shaft 'A' of diameter ‘d' and length T is subjected to a torque ‘T'. Another shaft 'B' made of aluminum of the same diameter 'd' and length 0.5 l is also subjected to the same torque T'. The shear modulus of steel is 2.5 times the shear modulus of aluminum. The shear stress in the steel shaft is 100 MPa. The shear stress in the aluminum shaft, in MPa, is

1.  40

2.  50

3.  100

4.  250

View Answer  
4
Correct Answer :

100


Explanation :
No Explanation available for this question
Previous Next

Interview Questions

MongoDB
Java Script
Node JS
PHP
JQuery
Python