Yes
No
✅ The correct answer is option B.
Mechanical Engineering MCQs
Glazing in grinding wheels can be decreased by
using a harder wheel or by increasing the wheel speed
using a softer wheel or by decreasing the wheel speed
using a harder wheel or by decreasing the wheel speed
using a softer wheel o
✅ The correct answer is option B.
In a shell and coil condenser, water flows in the shell and the refrigerant in the coil.
TRUE
FALSE
✅ The correct answer is option B.
In a four stroke cycle diesel engine, the exhaust valve
opens at 30° before bottom dead cnetre and closes at 10° after top dead centre
opens at 30° after bottom dead centre and closes at 10° before top dead centre
opens at bottom dead centre and closes at top dead centre
may open and close any
✅ The correct answer is option A.
The tap used to cut threads in a blind hole is
taper tap
second tap
bottoming tap
any one of these
✅ The correct answer is option C.
Coefficient of velocity is defined as the ratio of
actual velocity of jet at vena contracta to the theoretical velocity
area of jet at vena contracta to the area of orifice
actual discharge through an orifice to the theoretical discharge
none of the above
✅ The correct answer is option A.
The value of coefficient of discharge is __________ the value of coefficient of velocity.
less than
same as
more than
✅ The correct answer is option A.
The diameter of washer is generally taken bigger than the nut size.
TRUE
FALSE
✅ The correct answer is option A.
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is
✅ The correct answer is option B.
A refrigerant compressor is used to
raise the pressure of the refrigerant
raise the temperature of the refrigerant
circulate the refrigerant through the refrigerating system
all of the above
✅ The correct answer is option D.