The working temperatures in evaporator and condenser coils of a refrigerator are -25 °C and 30 °C, respectively. The COP of the refrigerator is 0.85 of the maximum COP for a power input of 2 kW. The refrigeration effect produced will be
Question 2
A rigid body is rotating with constant angular velocity about fixed axis, if velocity of a point of the body, then curl =
Question 3
A 0.75 meter aluminium bar 25 X in cross-section are attached to a 0.50 meter steel bar 15 X in cross-section area, as shown in the figure. Take E (Young’s modulus) value of 200 GPa for steel and 70 GPa for aluminium. Total shortening due to an axial compressive force of 175 kN is
Question 4
Eigen values of are
Question 5
Match List I with List II and select the correct answer List - I a. Pelton wheel (single jet) b. Francis Turbine c. Kaplan Turbine List - II 1. Medium discharge, low head 2. High discharge, low head 3. Medium discharge, medium head 4. Low discharge, high head
Question 6
A body cools from 90 °C to 80°C in 5 minutes. Under the same external conditions to cool from 80 °C to 70 °C the body will take __________.
Question 7
A 4 meter long solid circular cylindrical shaft transmits 1600 kW at 500 rpm. The endurance limit of the material is 210 MPa and a factor of safety of 3 is to be used with respect to fatigue failure. Use G = 77.5 GPa. The design diameter ‘D’ of the shaft in metre is
Question 8
A 50mm diameter steel rod was turned at 284 rpm and tool failure occurred in 10 minutes. The speed was changed to 232 rpm and the tool failed in 60 minutes. Assuming straight line relationship between cutting speed and tool life, the value of Taylorian Exponent is
Question 9
Consider the following statements regarding “Whiskers”: Statement 1: Whiskers are drawn from a single crystal in a preferred direction. Statement 2:Whiskers are free from mobile dislocations or contain very few dislocations to cause any plastic deformation. Statement 3: Behavior of Whiskers are inelastic. Statement 4: Iron Whiskers can sustain 5% strain without permanent deformation. Which of the above statements are true?
Question 10
In the complex plane, the angle between line (1+i) and (-1+i) is ________degrees. (where,)
Question 11
A gear train is made up of five spur gears as shown in the figure. Gear 2 is driver and gear 6 is driven member. N2. N3, N4. N5 and N6 represent number of teeth on gears 2, 3, 4, 5, and 6 respectively. The gear(s) which act(s) as idler(s) is/are
Question 12
Which of the following statements pertaining to vapour absorption refrigeration system is incorrect _______.
Question 13
In the assembly shown below, the part dimensions are: Assuming the normal distribution of part dimensions, the dimension in mm for assembly condition would be:
Question 14
A cubical block of 40cm side and of 30kg weight is allowed to slide down along a plane inclined at 30° to the horizontal on which there is a film of oil having viscosity 3×10-3Ns/m2. What will be the terminal velocity of the block if the film thickness is 0.03mm (take g =9.8 m/s2)
Question 15
The angular velocity of a flywheel is in radians. The equation that governors the rotation of a Engine flywheel is ω = 4t2 – t + 3. At 3 sec the angular acceleration of the flywheel will be_______.
about fixed axis, if 
velocity of a point of the body, then curl 
= 
in cross-section are attached to a 0.50 meter steel bar 15 X 
in cross-section area, as shown in the figure. Take E (Young’s modulus) value of 200 GPa for steel and 70 GPa for aluminium. Total shortening due to an axial compressive force of 175 kN is 
are 
) 
in mm for assembly condition would be: 
