where low speeds are required
for small power purposes and low speeds
for large power purposes
for small power purpos
✅ The correct answer is option D.
Mechanical Engineering MCQs
A pouring basin acts as a reservoir for the molten metal.
Agree
Disagree
✅ The correct answer is option A.
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
sum
difference
product
ratio
✅ The correct answer is option D.
In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
it considerably reduces mass of the system
it improves the C.O.P., as the condenser is small
the positive work in isentropic expansion of liquid is very small
it leads to significan
✅ The correct answer is option C.
A two stroke cycle engine gives __________ mechanical efficiency than a four stroke cycle engine.
higher
lower
✅ The correct answer is option A.
18-4-1 high speed steel contains
vanadium 4%, chromium 18% and tungsten 1%
vanadium 1%, chromium 4% and tungsten 18%
vanadium 18%, chromium 1% and tungsten 4%
none of the above
✅ The correct answer is option B.
The secondary unbalanced force is __________ the primary unbalanced force.
one-half
two-third
n times
1/n times
✅ The correct answer is option D.
The taper on cotter varies from
1 in l5 to 1 in 10
1 in 24 to 1 in 20
1 in 32 to 1 in 24
1 in 48 to 1 in 24
✅ The correct answer is option D.
Process layout is employed
where low volume of production is required
where similar jobs are manufactured on similar machines
where machines are arranged on functional basis
all of the above
✅ The correct answer is option D.
In the relation VTn = C, the value of n for high speed steel tools varies from 0.25 to 0.40.
Agree
Disagree
✅ The correct answer is option B.