Current
Voltage
Resistance
None of these
✅ The correct answer is option A.
Engineering MCQs
With increase in temperature, the thermal conductivity of steel
Increases
Decreases
Remains unchanged
Increases exponentially
✅ The correct answer is option B.
A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?
Cube
Plate
Sphere
All of the above
✅ The correct answer is option C.
Circulation pump is located below the evaporater to
Avoid cavitation
Avoid frequent priming
Create more suction head
None of these
✅ The correct answer is option C.
For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would
Decrease
Increase
First decrease and then increase
First increase and then decrease
✅ The correct answer is option D.
The separation of liquid droplets from the vapor is done by a/an __________ , in the evaporators.
Steam ejector
Entrainment separator
Compressor
Vacuum pump
✅ The correct answer is option B.
A __________ evaporator employs an annular downtake.
Basket type
Horizontal
Long tube vertical
None of these
✅ The correct answer is option A.
Presence of a non-condensing gas in a condensing vapour
Increases the rate of condensation
Decreases thermal resistance
Is desirable to increase the film co-efficient
None of these
✅ The correct answer is option D.
Black liquor generated during paper manufacture is concentrated in a
Single effect evaporator
Single effect evaporator followed by a crystalliser
Multiple effect evaporator
Multiple effect evaporators followed by a crystalliser
✅ The correct answer is option C.
Absorptivity and refletivity of a perfect black body are respectively
1 and 0
0 and 1
1 and ?
0 and 0.5
✅ The correct answer is option A.