Factor of safety is the ratio of the ___________________ stress to the working stress?

Related Mcqs:

1. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a _______________ calorimeter ?

   A. Bomb
   B. Throttling
   C. Junker’s
   D. Boy’s

2. Industrial workers working in leather tanning & manufacturing units are prone to suffer from ___________________?

   A. Respiratory ailments (e.g. bronchitis)
   B. Skin diseases (e.g. dermatitis)
   C. Silicosis
   D. Blurred vision

3. Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is ___________________?

   A. T2/(T1 – T2)
   B. T1/(T1 – T2)
   C. (T1 – T2)/T1
   D. (T1 – T2)/T2

4. Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________?

   A. Always greater than one
   B. Same at the same reduced temperature
   C. Same at the same reduced pressure
   D. Both B. & C

5. Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?

   A. λb/Tb
   B. Tb/λb
   C. √(λb/Tb)
   D. √(Tb/λb)

6. Which of the following is an example of stress corrosion ?

   A. Season cracking of brass
   B. Caustic embrittlement of steel
   C. Both A. & B.
   D. Neither A. nor (B)

7. The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ____________ decibels?

   A. 60
   B. 90
   C. 105
   D. 120

8. A man exposed to excessive noise level in the working environment may suffer from____________________?

   A. Hearing loss
   B. Rupture of ear drum
   C. Nervousness & fatigue
   D. All A., B. & C.

9. Maximum allowable concentration of CO2 in air for safe working is _____________ ppm (parts per million)?

   A. 50
   B. 1000
   C. 2000
   D. 5000

10. Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the__________________?

    A. Two temperatures only
    B. Pressure of working fluid
    C. Mass of the working fluid
    D. Mass and pressure both of the working fluid