Ammonia leakage in the refrigeration system is detected by

A. Sulphur stick, which on detection gives white smoke

B. Using chemical reagents

C. Its smell

D. Soap solution

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Addition of silicon to cast iron
  2. The trace metal present in insulin is
  3. Pick out the wrong statement about the machinability of metals. Machinability of a metal
  4. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
  5. The refrigerant freon-12 is chemically
  6. Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C…
  7. Insulation of liquid surface can be achieved by __________ on top of its surface.
  8. For separating small pieces of metal from engine oil of a car, the best separating technique is the
  9. Silicon percentage in silicon steel used for electrical equipments is about
  10. Powder metallurgy technique is used in the production of __________ tools.
  11. Pick out the correct combination about the role of various additives used in polymers.
  12. Machinability of hard alloys and tool steels is improved by
  13. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid…
  14. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction…
  15. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
  16. Load cells used for the measurement of weight has
  17. In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres…
  18. Maximum consumption of limestone is in the __________ industry.
  19. The most important function of a washer is to provide bearing area and washers are normally specified…
  20. With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________…
  21. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
  22. Resilience of a bolt can be increased by increasing its
  23. The main constituent of bones is
  24. Limestone is added in the blast furnace (during pig iron manufacture) to
  25. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
  26. Tempering of a material does not improve its
  27. Fog is an example of colloidal system of
  28. Bad odour in sanitary latrines is reduced by periodically sprinkling
  29. Which of the following is resistant to the action of both heat & chemicals?
  30. Blast furnace slag is mainly molten