Free Printable Turbo-Machines Assignment-01 (Unit-1)

1.

Turbo Machines Works on which Principle

a)

Thermodynamics

b)

Impulse Momentum Principle

c)

2nd Low of Thermodynamics

d)

Pascals Law

2.

What is a Turbo-machine?

a)

A turbo-machine is a rotary machine

b)

A turbo-machine is a Reciprocating machine

c)

A turbo-machine is a Oscillating machine

d)

All of these

3.

What is the impulse principle?

a)

Greater impulse applied causes greater increase in velocity

b)

The lower the center of mass, the larger the base of support

c)

Movement usually occurs in direction opposite of the applied

d)

None of the above

4.

The SI unit for energy is

a)

Newtons

b)

Newton seconds

c)

Jules-sec

d)

joules

5.

Which of the following in POWER GENERATING machine

a)

Axial flow pump

b)

Axial flow compressor

c)

Pelton wheel

d)

Radial flow fan

6.

Which of the following in an example of tangential flow turbine

a)

b)

c)

d)

7.

Find Force Exerted by a Jet of Water of Diameter 75 mm on a Stationary flat Plate, When Jet strikes the plate normally with velocity of 20m/s

a)

1768 kN

b)

1.768 kN

c)

88.8kN

d)

88400N

8.

7.5cm Diameter jet & velocity of 12m/s strikes on incline plat at 60^oangle to normal to the plate, Find force on plate

(a)

9.

Impulse Moment Principle depends on Newtons Second low of motion

a)

False

b)

True

10.

Efficiency for the Force Exerted by Jet on moving Flat Plate is given by

a)

b)

c)

d)

11.

Force exerted by jet on fixed curved plate is given by

a)

F=ρaV^2(1-\cosθ)

b)

$F=ρaV^2(1+\cosθ)$

c)

$F=ρaV^2(1+\sinθ)$

d)

$F=ρaV^2(1-\sinθ)$

12.

A jet of water having area of jet 0.00442m², moving with velocity of 30 m/s strikes a curved fixed plate at one end at an angel of 30^o to the horizontal. The jet leaves the plate with same velocity and angle. Find force exerted by jet on plate in x and y direction

a)

F_x=0N , F_y=6890N

b)

F_x=6890N , F_y=6890N

c)

F_x=6890N , F_y=0N

d)

F_x=6890KN , F_y=0N

13.

Maximum efficiency for the Force exerted by jet on Moving curve plate when jet strikes plate at the center of plate

a)

29.2

b)

8/27

c)

27/8

d)

50

14.

Maximum efficiency for the Force exerted by jet on Moving curve plate when jet strikes at the center of the plate is 50%

a)

True

b)

False

15.

A jet of water of 7.5 cm diameter strikes a curved plate at its center with a velocity of 20m/s. The curve plate is moving with 8m/s in the direction of jet. The jet is deflected at an angle of 165o. Assuming the plate as smooth. Find 1) Force exerted on plate in the direction of jet 2) power of jet 3) Efficiency

a)

$F=1250N,P=10kW\ \ \eta=55.9\%$

b)

$F=1250kN,\ P=10kW,\ \ \eta=55.9\%$

c)

$F=1488kN,P=10kW,\ \ \eta=60.9\%$

d)

$F=1488N,\ P=10kW,\ \ \eta=60.9\%$

Turbo-Machines Assignment-01 (Unit-1)

Total questions: 15

Worksheet time: 20mins

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