none of these
✅ The correct answer is option A.
Mechanical Engineering MCQs
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will
cause withdrawing or throttling of steam
reduce length of effective stroke of piston
reduce maximum opening of port to steam
all of these
✅ The correct answer is option B.
Which of the following statement is correct regarding petrol engines?
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure.
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition.
all of the above
✅ The correct answer is option B.
An oil filter bypass valve opens when the
engine is cold
engine overheats
oil filter becomes clogged
engine runs at high sp
✅ The correct answer is option C.
The leakage in a refrigeration system using freon is detected by
halide torch
sulphur sticks
soap and water
all of these
✅ The correct answer is option A.
In order to produce uniform packing of sand in the moulds, a __________ is used.
sand slinger
squeezing machine
jolt machine
stripper plate machine
✅ The correct answer is option A.
In case of an over-reinforced beam, the depth of actual neutral axis is the same as that of the critical neutral axis.
TRUE
FALSE
✅ The correct answer is option B.
In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.
intersecting
non-intersecting and non-parallel
✅ The correct answer is option B.