Muntz metal contains copper and zinc in the ratio of________________?

Related Mcqs:

1. Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________?

   A. 50 : 50
   B. 30 : 70
   C. 70 : 30
   D. 40 : 60
   E. 60 : 40

2. Aluminium bronze contains aluminium and copper in the ratio of___________________?

   A. 50 : 50
   B. 40 : 60
   C. 60 : 40
   D. 10 : 90
   E. 90 : 10

3. Brass (alloy of copper and zinc) is an example of__________________?

   A. substitutional solid solution
   B. interstitial solid solution
   C. intermetallic compounds
   D. all of the above
   E. none of the above

4. Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

   A. Lean mixture
   B. Chemically correct fuel air ratio
   C. Rich mixture
   D. Unpredictable

5. The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?

   A. lean mixture
   B. chemically correct mixture
   C. rich mixture
   D. unpredictable
   E. none of the above

6. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?

   A. 50 : 20 : 20 : 10
   B. 40 : 30 : 20 : 10
   C. 50 : 20 : 10 : 20
   D. 30 : 20 : 30 : 20
   E. 50 : 10 : 20 : 20

7. In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?

   A. 0.85
   B. 1
   C. 1.1 to 1.3
   D. 1.2 to 1.5

8. Which of the following alloys does not have copper as one of the constituents________________?

   A. delta metal
   B. monel metal
   C. constantan
   D. nichrome
   E. silicon bronze

9. Addition of copper to aluminium results in_____________________?

   A. improvement of casting characteristics
   B. improvement of corrosion resistance
   C. one of the best known age and precipitation-hardening systems
   D. improving machinability
   E. none of the above

10. The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?

    A. lean mixture
    B. chemically correct mixture
    C. rich mixture
    D. unpredictable
    E. none of the above