Mechanical Engineering Archives

531. A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)

P = W tan α

P = W tan (α + φ)

P = W (sin α + μ cos α)

P = W (cos α + μ sin α

✅ The correct answer is option C.

532. The flow in a pipe is neither laminar nor turbulent when Reynold number is

less than 2000

between 2000 and 2800

more than 2800

none of these

✅ The correct answer is option B.

533. Which of the following statement is correct as regard to water wheels?

They have slow speeds.

They are suitable even for low water heads.

They give constant efficiency, even if the discharge is not constant

all of the above

✅ The correct answer is option D.

534. The specific speed of a hydraulic turbine depends upon

speed and power developed

discharge and power developed

speed and head of water

speed, power developed

✅ The correct answer is option D.

535. The torque converter uses __________ to transfer torque.

air

automatic transmission fluid (ATF)

gears

steel belt

✅ The correct answer is option B.

536. The layer at the centre of gravity of the beam as shown in the below figure, will be

in tension

in compression

neither in tension nor in compression

✅ The correct answer is option C.

537. The bending moment M and a torque T is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then M is equal to

T/2

2 T

4 T

✅ The correct answer is option A.

538. A fast and loose pulley drive is used when

shafts are arranged parallel and rotate in the opposite directions

shafts are arranged parallel and rotate in the same directions

shafts are arranged at right angles and rotate in one definite direction

driven shaft is to be

✅ The correct answer is option D.

539. The equivalent evaporation is defined as

the ratio of heat actually used in producing the steam to the heat liberated in the furnace

the amount of water evaporated or steam produced in kg per kg of fuel burnt

the amount of water evaporated from and at 100° C into dry and saturated steam

the evaporation of 15.

✅ The correct answer is option C.

540. According to Indian standard specifications, a grey cast iron designated by ‘FG 200’ means that the

carbon content is 2%

maximum compressive strength is 200 N/mm2

minimum tensile strength is 200 N/mm2

maximum shear strength

✅ The correct answer is option C.