A. Melts below the melting points of base metals
B. Melts below 300°C
C. Is copper phosphorous alloy
D. Is copper
0
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________?
0
The minimum temperature to which the water can be cooled in a cooling tower is the ______________ temperature of air?
A. 23
B. 23/2
C. 25/2
D. 21/3
0
Ammonia gas can be dried by___________________?
A. Ambient
B. Dry bulb
C. Dew point
D. Wet bulb
0
‘Dikes’ are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ?
A. PCl5
B. Quick lime
C. CaCl2
D. Concentrated H2SO4
0
On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is__________________?
A. V
B. V/2
C. 2V
D. 3V
0
Out of the following substances, one ton of ______________ will store the maximum heat for a rise of 30°C in temperature ?
A. Creep
B. Toughness
C. Tensile strength
D. Fatigue
0
Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is ________________ mm?
A. Steel
B. Lignite
C. Water
D. Lime stone
0
Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type________________?
A. 15
B. 25
C. 10
D. 30
0
Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its________________?
A. Parallel flow with equal heat capacities
B. Counter flow with equal heat capacities
C. Counter flow with unequal heat capacities
D. Parallel flow with unequal heat capacities
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