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Casting alloys with a large freezing range tend to result in
P. shrinkage cavity
Q. distributed shrinkage porosity
R. liquid metal with poorer fluidity
S. liquid metal with superior fluidity

Casting alloys with a large freezing range tend to result in
P. shrinkage cavity
Q. distributed shrinkage porosity
R. liquid metal with poorer fluidity
S. liquid metal with superior fluidity Correct Answer P, S

Related Questions

It is desired to freeze 10,000 loaves of bread each weighing 0.75 kg from an initial room temperature of 18°C to a final temperature of -18°C. The bread-freezing operation is to be carried out in an air-blast freezing tunnel. It is found that the fan motors are rated at a total of 80 horsepower and measurements suggest that they are operating at around 90% of their rating, under which conditions their manufacturer’s data claims a motor efficiency of 86%. If 1 ton of refrigeration is 3.52 kW, estimate the maximum refrigeration load imposed by this freezing installation assuming that fans and motors are all within the freezing tunnel insulation and the heat-loss rate from the tunnel to the ambient air has been found to be 6.3 kW. Extraction rate from freezing bread (maximum) = 104 kW
Consider the following statements. (1) Hot chamber machine is used for casting zinc, tin and other low melting alloys (2) Cold chamber machine is used for die casting of ferrous alloys (3) Rapid cooling rate in die casting produces high strength and quality in many alloys Which of these statements are correct? 
Which of the following statements are correct with reference to ensuring minimum shrinkage of prestressed concrete? 1. The water-cement ratio and proportion of cement paste should be kept minimum to reduce shrinkage. 2. Aggregates of larger size, well graded for minimum void, need a smaller amount of cement paste, and attendant shrinkage will be smaller. 3. Harder and denser aggregates of low water absorptions and high modulus of elasticity will exhibit small shrinkage.
If we decrease the freezing range, then the fluidity of metal will?
Consider three software items: Program-X, Control Flow Diagram of Program-Y and Control Flow Diagram of Program-Z as shown below Program-X: Control Flow Diagram of Program-Y sumcal (int maxint, int value) {       int result=0, i=0;       if (value <0)       {           Value = -value;       }       while ( (i
Assertion (A): Aluminium alloys are cast in a hot chamber die casting machine. Reason (R): Aluminium alloys require high melting when compared to zinc alloys.
A 250 mm by 250 mm ingot casting, 1.5 m high and at 1225 K temperature, is stripped from its mold. The casting is made to stand on end on the floor of a large foundry whose wall, floor and roof can be assumed to be at 300 K temperature. Make calculation for the rate of radiant heat interchange between the casting and the room. The casting material has an emissivity of 0.85
Casting of non-ferrous alloys by continuous casting method can cause an explosion if the casting contacts with water during processes.
If the first two statements are true, the third statement is :
I. Cloudy days tend to be more windy than sunny days.
II. Foggy days tend to be less windy than cloudy days.
III. Sunny days tend to be less windy than foggy days.
The accompanying image shows a large cube made of dark and white small sugar cubes. Small cubes of the diagonally arranged row of the bottom surface of the large cube, small cubes of the row with one face on the right-hand surface of the large cube, small cubes of the row with one face on the front surface of the large cube, and small cubes of the column with one face on the top of large cube surface are all dark. Select the number of small white cubes of the large cube.