equal to
twice
three times
four times
✅ The correct answer is option B.
Mechanical Engineering MCQs
In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre.
Yes
No
✅ The correct answer is option A.
The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
efficiency of the boiler
efficiency of the chimney
efficiency of the fan
power of the boiler
✅ The correct answer is option B.
The friction experienced by a body, when at rest, is known as
static friction
dynamic friction
limiting friction
coefficient of frictio
✅ The correct answer is option A.
Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.
Agree
Disagree
✅ The correct answer is option A.
The minimum size of a bloom is
5 cm x 5 cm
10 cm x 10 cm
15 cm x 15 cm
20 cm x 20 cm
✅ The correct answer is option C.
The heating of a gas at constant pressure is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option B.
The workdone on a compressor will be minimum if air is taken from
the atmosphere
a source at 0° C
a source of low temperature air
a source of high tempe
✅ The correct answer is option C.
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as
feedpump
injector
feed check valve
pressure gauge
✅ The correct answer is option A.
The reconditioning process used to give cylinder bore surfaces a cross-hatch pattern, is known as
honing
porous plating
boring
shot peening
✅ The correct answer is option A.