81. 


Answer: (c)

82. When the momentum flux is less than the value of 𝜏𝜏0, the velocity gradient for a Bingham fluid, will be:
(a) Two
(b) One
(c) Half
(d) Zero

Answer: (d)

83. Process Safety Information (PSI) is needed:
1. To document formally the as-built/as-modified condition of the plant
2. To provide the necessary data with which to perform the required hazard analysis
3. To communicate information on hazardous substances to employees and others as required by state or federal regulations

(a) 1 and 2 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3

Answer: (d)

84. If,

Answer: (a)

85.
(a) 0.29 𝑚𝑚
(b) 0.37 𝑚𝑚
(c) 0.45 𝑚𝑚
(d) 0.53 𝑚𝑚

Answer: (d)

86. In heat conduction with a nuclear heat source:

Answer: (a)

87. Consider the following data for an insulating wall:

Answer: (b)

88. 

Answer: (a)

89. The causes of desertification are:
1. Overgrazing
2. Cultivation of marginal lands

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Answer: (c)

90. Froude number NFr is:

Answer: (a)