260. The bulk modulus of a material with Poisson’s ratio of 0.5 is equal to
A. 3 x Young’s modulus
B. Young’s modulus
C. Infinity
D. Zero
✅ The correct answer is option C.
263. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³) while the C.V. is same on weight basis (i.e., kcal/kg) ?
A. Propane and acetylene
B. Propane and LPG
C. Sewage gas and gobar gas
D. B.F gas and coke oven gas
✅ The correct answer is option D.
265. The surface tension of a liquid, at critical temperature is
A. Indeterminate
B. Zero
C. Infinity
D. Same as that at any other temperature
✅ The correct answer is option B.
231. Dry saturated steam can be converted into superheated steam by
A. Increasing its cross-sectional area of flow
B. Passing it through a pressure reducing valve
C. Forcing it downwards through a vertical tube
D. None of these
✅ The correct answer is option B.
233. For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.
A. 250
B. 500
C. 1000
D. 3000
✅ The correct answer is option B.
235. A boy weighing 110lb climbs up a 50 ft high vertical destination in 100 seconds. Horse power of the boy is __________ hp.
A. 0.1
B. 0.5
C. 0.8
D. 1
✅ The correct answer is option A.
237. Wrought iron does not have the
A. Uniform strength in all directions
B. Ability to hold protective coating
C. High ductility & corrosion resistance
D. Easily weldable characteristics
✅ The correct answer is option A.
239. Non-ferrous alloys used for making cutting tools need not have high
A. Abrasion resistance
B. Toughness
C. Red hardness
D. Cutting speed
✅ The correct answer is option B.
241. Gas turbine normally employs a constant __________ cycle.
A. Pressure
B. Temperature
C. Volume
D. None of these
✅ The correct answer is option A.
244. Heat treatment of steel is done to mainly change its __________ properties.
A. Physical
B. Chemical
C. Mechanical
D. Surface
✅ The correct answer is option C.