For the audio cassette mechanism where is the instantaneous centre of rotation (point) of the two spools

1.  Point P lies to the left of both the spools but a infinity a long the line joining A and H

2.

3.

4.  Point P lies a t the intersection of the line joining B a nd C a nd the line joining G a nd F

4

Point P lies a t the intersection of the line joining B a nd C a nd the line joining G a nd F

Explanation :
No Explanation available for this question

With regard to belt drives with given pulley diameters, centre distance and coefficient of friction between the pulley and the belt materials, which of the statements below are FALSE

1.  A crossed flat belt configuration ca n transmit more power than an open flat belt configuration

2.  A ‘V’ belt has greater power transmission ca p a city than a n open belt

3.  Power transmission is greater when belt tension is higher due to centrifugal effects than the s a me belt drive when centrifugal affects are absent

4.  Power transmission is the greatest just before the point of slipping is reached

4

Power transmission is greater when belt tension is higher due to centrifugal effects than the s a me belt drive when centrifugal affects are absent

Explanation :
No Explanation available for this question

Under repeated lo a ding a material ha s the stress-strain curve shown in Fig.2.12. Which of the following statements is true

1.  The smaller the shaded area , the better the material damping

2.    The larger the shaded area , the better the material damping

3.  Material damping is a n independent material property and does not depend on this curve

4.  None of the above

4

The smaller the shaded area , the better the material damping

Explanation :
No Explanation available for this question

Consider the system of two wagons . The natural l frequencies of this system are

1.  0,√2K/M

2.  √K/M,√2K/M

3.  √K/M,√K/M

4.  0,√ K/2M

4

√K/M,√K/M

Explanation :
No Explanation available for this question

Water flows through a vertical contraction from a pipe of diameter d to another of diameter The flow velocity a t the inlet to the contraction is 2m/s and pressure 200 kN/m2. If the height of the contraction measures 2m, the pressure a t the exit of the contraction will be very nearly

1.  168 kN/m2

2.  192 kN/m2

3.  150 kN/m2

4.  174 kN/m2

4

150 kN/m2

Explanation :
No Explanation available for this question

It is proposed to coat a 1 mm diameter wire with enamel paint (k = 0.1 W/mK) to increase heat transfer with air. II the air side heat transfer coefficient is 100 W/m2 K, the optimum thickness of enamel paint should be

1.  0.25 mm

2.  0.5 mm

3.  1 mm

4.  2 mm

4

0.5 mm

Explanation :
No Explanation available for this question

An aeroplane is cruising at a speed of 800 kmph a t a n altitude, where the temperature is 0°C. The flight Mach number a t this speed is nearly

1.  1.5

2.  0.254

3.  0.67

4.   2.04

4

0.67

Explanation :
No Explanation available for this question

An isolated thermodynamic system executes a process. Choose the correct statement (s) from the following:

1.  No heat is transferred

2.  No work is done

3.  No mass flows a cross the boundary of the system

4.  No chemical reaction takes place within the system

4

No mass flows a cross the boundary of the system

Explanation :
No Explanation available for this question

The silencer of an internal combustion engine

1.  reduces noise

2.  decreases brake specific fuel consumption (BSFC)

3.  increases BSFC

4.  has no effect on its efficiency

4

reduces noise

Explanation :
No Explanation available for this question

For butt - welding 40 mm thick steel plates, when the expected quantity of such jobs is 5000 per month over a period of 10 years, choose the best suitable welding process out of the following available alternatives.

1.  Submerged are welding

2.  Oxy - acetylene gas welding

3.  Electron beam welding

4.  MIG welding

4