# A large hydraulic turbine is to generate 300 kW at 1000 rpm under a head of 40 m. for initial testing, a 1:4 scale model of the turbine operates under a head of 10 m. the power generated by the model (in kW) will be

1.  2.34

2.  4.68

3.  9.38

4.   18.75

4

4.68

Explanation :
No Explanation available for this question

# The statement concern psychrometric chart. Constant relative humidity lines are uphill straight lines to the right Constant wet bulb temperature lines are downhill straight lines to the right. Constant specific volume lines are downhill straight lines to the right.  Constant enthalpy lines are coincident with constant wet bulb temperature lines. Which of the statements are correct

1.  2 and 3

2.   1 and 2

3.  1 and 3

4.  2 and 4

4

2 and 4

Explanation :
No Explanation available for this question

# A 100 W electric bulb was switched on in a 2.5 m x 3 m x 3 m size thermally insulated room having a temperature of 20°C. The room temperature at the end of 24 hours will be

1.  321 °C

2.  341 °C

3.  450 °C

4.  470 °C

4

341 °C

Explanation :
No Explanation available for this question

# In a two-dimensional velocity field with velocities u and v along the x and y directions respectively, the convective acceleration along the x-direction is given by

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# A two-dimensional flow field has velocities along the x and y directions given by u = x2t and v = -2xyt respectively, where t is time. The equation of streamlines is

1.  x2y = constant

2.  xy2 = constant

3.  xy = constant

4.  not possible to determine

4

x2y = constant

Explanation :
No Explanation available for this question

# A thin layer of water in field is formed after a farmer has watered it. The ambient air conditions are: temperature 20 °C and relative humidity 5%. An extract of steam tables is given below Temperature (°C) -15 -10 -5 0.01 5 10 15 20 Saturation pressure (kPa) 0.10 0.26 0.40 0.61 0.87 1.23 1.71 2.34     Neglecting the heat transfer between the water and the ground, the water temperature in the field after phase equilibrium is reached equals

1.  10.3 °C

2.  -10.3 °C

3.   -14.5 °C

4.  14.5 °C

4

-14.5 °C

Explanation :
No Explanation available for this question

# Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: In a power pant working on a Ranking cycle, the regenerative feed water heating improves the efficiency of the steam turbine. Reason [r]: The regenerative feed water heating raises the average temperature of heat addition in the Rankine cycle

1.  Both [a] and [r] are true and [r] is the correct reason for [a]

2.  Both [a] and [r] are true but [r] is NOT the correct reason for [a]

3.  Both [a] and [r] are false

4.  [a] is false and [r] is true

4

[a] is false and [r] is true

Explanation :
No Explanation available for this question

# Match the items in columns I and II. Column I Column II (P) Charpy test (1) Fluidity (Q) Knoop test (2) Micro hardness (R) Spiral test (3) Formability (S) Cupping test (4) Toughness   (5) Permeability

1.  P-4 Q-5 R-3 s-2

2.  P – 3 Q-5 R - 1 S - 4

3.  P-2 Q-4 R-3 S-5

4.  P-4 Q-2 R-1 S-3

4

P-4

Q-2

R-1

S-3

Explanation :
No Explanation available for this question

# The accuracy of Simpson’s rule quadrature for a step size h is

1.  0(h2)

2.  0(h3)

3.  0(h4)

4.  0(h5)

4

0(h5)

Explanation :
No Explanation available for this question

1.  3 and -3

2.   -3 and -5

3.  3 and 5

4.  5 and 0

4