# A brand brake having band width of 80mm, drum diameter of 250mm, coefficient of friction 0.25 and angle of wrap of 270degrees is required to exert a friction torque of 1000N-m. The maximum tension (in kN) developed in the band is

1.  1.88

2.  3.56

3.   6.12

4.  11.56

4

11.56

Explanation :
No Explanation available for this question

# Axial operation claw clutches having self-locking tooth profile

1.  can be disengaged at any speed

2.  can be disengaged only when unloaded

3.  can be engaged only when unloaded

4.  can work only with load

4

can be disengaged at any speed

Explanation :
No Explanation available for this question

# The number of slots in a 25 mm castle nut is

1.  6

2.  4

3.  2

4.  8

4

6

Explanation :
No Explanation available for this question

# Planck’s law holds well for

1.  All colour bodies

2.  Black bodies

3.  White bodies

4.  Both a and b

4

Both a and b

Explanation :
No Explanation available for this question

# Stefan-Boltzmann equation is

1.  Q=pAT

2.  Q=pAT3

3.  Q=pAt2

4.  Q=pAT4

4

Q=pAT4

Explanation :
No Explanation available for this question

# Unit of Stefan –Boltzmann constant is

1.  Watt/cm3-k4

2.  Kcal/m2-hr-k4

3.  Cal/cm2-sec-K4

4.  All of these

4

All of these

Explanation :
No Explanation available for this question

# Value of Stefan Boltzmann constant in Kcal/m2-hr-k4 is

1.  4.87*10-6

2.  4.87*10-8

3.  5.67*10-6

4.  5.67*10-8

4

4.87*10-8

Explanation :
No Explanation available for this question

# Equilibrium temperature of the plate when it is oxidized with emissivity=0.80 will be

1.  3390K

2.  4490K

3.  5390K

4.  None of these

4

3390K

Explanation :
No Explanation available for this question

# What is monochromatic radiant flux density at 1μ wavelength

1.  2.81*107W/m2 per meter wave length

2.  3.91*106W/m2 per meter wave length

3.  9.91*107W/m2 per meter wave length

4.  None of these

4

2.81*107W/m2 per meter wave length

Explanation :
No Explanation available for this question

# What will be net radiation heat transfer between two parallel planes

1.  σbA(T14-T24)/15

2.  σb A(T14+T24)/15

3.   σb A(T24-T14)/15

4.  None of these

4