A lightly loaded full journal bearing has a journal of 50mm, bush bore of 50.05mm and bush length of 20mm. if rotational speed of journal is 1200rpm and average viscosity of liquid lubricant is 0.03 Pa s, the power loss (in W) will be

1.  37

2.  74

3.  118

4.  237

View Answer  
4
Correct Answer :

37


Explanation :
No Explanation available for this question

For the configuration shown, the angular velocity of link AB is 10 rad/s counterclockwise. The magnitude of the relative sliding velocity (in ms-1) of slider B with respect to rigid link CD is

1.  0

2.  0.86

3.  1.25

4.   2. 5

View Answer  
4
Correct Answer :

2. 5


Explanation :
No Explanation available for this question

A smooth pipe of diameter 200mm carries water. The pressure in the pipe at section S1 (elevation: 10m) is 50kPa. At Section S2 (elevation: 12m) the pressure is 20kPa and velocity is 2ms-1. Density of water is 1000kgm-3 and acceleration due to gravity is 9.8ms-2. Which of the following is TRUE

1.  flow from S1 to S2 and head loss is 0.53m

2.  flow from S2 to S1 and head loss is 0.53m

3.  flow from S1 to S2 and head loss is 1.06m

4.  flow from S2 to S1 and head loss is 1.06m

View Answer  
4
Correct Answer :

flow from S1 to S2 and head loss is 1.06m


Explanation :
No Explanation available for this question

A mono-atomic ideal gas (y = 1.67, molecular weight = 40) is compressed adiabatically from 0.1MPa, 300K to 0.2MPa. The universal gas constant is 8.314kJkmol-1K-1. The work of compression of the gas (in kJ kg-1) is

1.  29.7

2.  19.9

3.   13.3

4.   0

View Answer  
4
Correct Answer :

29.7


Explanation :
No Explanation available for this question

Consider the following two processes: a. A heat source at 1200K loses 2500kJ of heat to sink at 800K b. A heat source at 800K loses 2000kJ of heat to sink at 500K which of the following statements is TRUE

1.  Process I is more irreversible than Process II

2.  Process II is more irreversible than Process I

3.  Irreversibility associated in both the processes is equal

4.  Both the processes are reversible

View Answer  
4
Correct Answer :

Process II is more irreversible than Process I


Explanation :
No Explanation available for this question

A fin has 5mm diameter and 100mm length. The thermal conductivity of finmaterial is 400Wm-1K-1. One end of the fin is maintained at 130°C and its remaining surface is exposed to ambient air at 30°C. if the convective heat transfer coefficient is 40Wm-2K-1, the heat loss (in W) from the fin is

1.  0.08

2.  5.0

3.  7.0

4.  7.8

View Answer  
4
Correct Answer :

5.0


Explanation :
No Explanation available for this question

A moist air sample has dry bulb temperature of 30°C and specific humidity of 11.5g water vapour per kg dry air. Assume molecular weight of air as 28.93. If the saturation vapour pressure of water at 30°C is 4.24kPa and the total pressure is 90kPa, then the relative humidity (in %) of air sample is

1.  50.5

2.  38.5

3.  56.5

4.  68.5

View Answer  
4
Correct Answer :

38.5


Explanation :
No Explanation available for this question

Two pipes of inner diameter 100mm and outer diameter 110mm each joined by flash butt welding using 30V power supply. At the interface, 1mm of material melts from each pipe which has a resistance of 42.4Ω. If the unit melt energy is 64.4MJm-3, then time required for welding in seconds is

1.  1

2.  5

3.   10

4.  20

View Answer  
4
Correct Answer :

10


Explanation :
No Explanation available for this question

For tool A, Taylor's tool life exponent (n) is 0.45 and constant (K) is 90. Similarly for tool B, n=0.3 and K=60. The cutting speed (in m/min) above which tool A will have a higher tool life than tool B is

1.  26.7

2.   42.5

3.  80.7

4.  142.9

View Answer  
4
Correct Answer :

80.7


Explanation :
No Explanation available for this question

A taper hole is inspected using a CMM, with a probe of 2mm diameter. At a height, Z=10mm from the bottom, 5 points are touched and a diameter of circle (not compensated for probe size) is obtained as 20mm. similarly, a 40mm diameter is obtained at a height Z=40mm. the smaller diameter (in mm) of hole at Z=0 is

1.  13.334 M

2.  15.334

3.  15.442

4.  15.542

View Answer  
4
Correct Answer :

13.334 M


Explanation :
No Explanation available for this question
Previous Next

Interview Questions

MongoDB
Java Script
Node JS
PHP
JQuery
Python