Mechanical Engineering Archives

4301. Power of a governor is the

mean force exerted at the sleeve for a given percentage change of speed

workdone at the sleeve for maximum equilibrium speed

mean force exerted at the sleeve for maximum equilibrium speed

none of the above

✅ The correct answer is option D.

4302. Environmental protection agencies advice against the use of chloro-fluoro-carbon refrigerants since

these react with water vapour and cause acid rain

these react with plants and cause green-house effect

these react with oxygen and cause its depletion

these react with ozone

✅ The correct answer is option D.

4303. The delta-iron possesses a body centred cubic space lattice.

Correct

Incorrect

✅ The correct answer is option A.

4304. The overall isothermal efficiency of the compressor is defined as the ratio of

work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio

isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

volume of free air delivery per stroke to the swept volume of the piston

isentropic power to th

✅ The correct answer is option B.

4305. Chilled cast iron is produced

by adding magnesium to molten cast iron

by quick cooling of molten cast iron

from white cast iron by annealing process

none of these

✅ The correct answer is option B.

4306. A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

steam condenser

steam boiler

steam preheater

economiser

✅ The correct answer is option A.

4307. The ratio of the energy absorbed by the body to the total energy falling on it, is called

absorptive power

emissive power

emissivity

none of these

✅ The correct answer is option A.

4308. The assumption made in the theory of the reinforced cement concrete beam is that

all the tensile stresses are taken up by the steel reinforcement only

there is a sufficient bond between steel and concrete

the steel and concrete are stressed within its elastic limit

all of the above

✅ The correct answer is option D.

4309. The combustion in compression ignition engines is

homogeneous

hetrogeneous

both (a) and (b)

none of these

✅ The correct answer is option B.

4310. A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

smaller

greater

✅ The correct answer is option B.