M

Mr. Dubey • 100.64K Points
Coach

Q. A good Cobalt-60 shot is made on a 7.6 cm (3 inches) steel casting using an exposure time of 10 minutes and a source-to-film distance of 91.5 (36 inches). If it is necessary to change the source-to-film distance to 61 cm (24 inches), what exposure time would produce a similar radiograph if all other conditions remain the same?

  • (A) 1.6 minutes
  • (B) 4.4 minutes
  • (C) 6.4 minutes
  • (D) 8.8 minutes
Share

No solution found for this question.
Add Solution and get +2 points.

You must be Logged in to update hint/solution

Discusssion

Login to discuss.

Related MCQs

Q. What is a thread per inch in screw thread?

Q. Material generally used for bus bars is

Q. During which time the demand of electrical energy is maximum?

Q. Which type of motors are preferred in lifts?

Q. Entropy of mixture of two gases after sudden mixing is

Q. If the end mixture of S.I. engine is having low temperature and long igition delay, then knocking will

Q. For a 100 hp 250 V, compound dc motor with compensating winding has a field current of 5 A to produce a voltage of 250 V at 1200 rpm. What will be the

Q. Which AutoCAD command will determine precisely the volume of a complex (or simple) 3D Solid part?

Q. In case of petrol engines, into the engine cylinder during suction stroke

Q. Quenching cracks during heat treatment can be minimised

Question analytics