931. The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.
A. Air
B. Water
C. Mercury
D. Alcohol
✅ The correct answer is option B.
Engineering
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932. Addition of __________ to steel can not impart it high strength at elevated temperature.
A. Nickel
B. Magnesium
C. Silicon
D. Manganese
✅ The correct answer is option B.
933. Function of feed check valve in a boiler is to
A. Facilitate circulation of high pressure feed water
B. Check the water level in the boiler drum
C. Prevent the back flow of water
D. Regulate the water flow to boiler
✅ The correct answer is option C.
934. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
A. Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller
B. Maintaining vacuum on tube side is more difficult than that on the shell side
C. Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam
D. Condenser can act as a storage unit for condensed steam
✅ The correct answer is option C.
935. Titanium alloys are welded using the Following process:
A. TIG welding
B. Submerged arc welding
C. Butt welding
D. Electron beam welding
✅ The correct answer is option A.
936. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type
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
✅ The correct answer is option B.
937. Blast furnace is a
A. Counter current reactor
B. Co-current reactor
C. Cross-current reactor
D. Combination of all the three
✅ The correct answer is option A.
938. In chemical dehumidification of air
A. Both specific humidity & dry bulb temperature increases
B. Both specific humidity & dry bulb temperature decreases
C. Specific humidity decreases & dry bulb temperature increases
D. Specific humidity increases & dry bulb temperature decreases
✅ The correct answer is option C.
939. A good abrasive
A. Should be friable
B. Should have low refractoriness
C. Is made up of large size of crystals
D. Should be soft
✅ The correct answer is option A.
940. Young’s modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby
A. Alloying additions
B. Heat treatment
C. Cold work
D. Increasing temperature
✅ The correct answer is option B.