Related Questions

Consider the following statements: 1. HSS tools wear very rapidly, whereas in cemented carbide tools, even though hardness is retained, crater wear can occur due to solid-state diffusion. 2. Cutting tools made of Super-HSS, also known as cobalt-based HSS, are made by adding 2% to 15% of cobalt which increases the cutting efficiency at heavier cuts by increasing the hot hardness and wear resistance. 3. Tools failure due to excessive stress can be minimized by providing small or negative rake angles on brittle tool materials, protecting tool tip by providing large side-cutting edge angles, and honing a narrow chamfer along the cutting edge. Which of the above statements are correct?
Cemented carbide cutting tools are
P. made by casting
Q. made of mainly WC and cobalt
R. made of Fe3C and cobalt
S. made by liquid phase sintering
Which of the statement/s is /are correct about the steel sector in India? a) As of 2019, India is the 3rd largest producer of steel. b) The top producer of steel in the world China, accounts for almost 50% of the steel production. c) India’s steel policy 2017 envisages a target of 300MT by 2030.
P, Q, R, S, T and U are six persons who have different mobiles - Nokia, Vivo, Oppo, Samsung, Apple and Jio (but not necessarily in the same order). P does not have Apple mobile. U does not have Oppo nor Vivo mobile. T has a Nokia mobile. R does not have Oppo nor Apple mobile. Q does not have Samsung nor Oppo mobile. P does not have Oppo nor Jio mobile. U does not have Jio nor Apple mobile. Which of the following combinations is correct?
In the question below, are given a statement followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the following suggested courses of actions logically follow(s) for pursuing. Statement: Specialty steel and wire ropes maker Usha Martin's decision to sell one of its core businesses - steelmaking - to prune outstanding debt, marks the rare instance of an Indian corporate borrower meeting its loan obligations through divestment. The slump sale is a milestone in the six-decade history of the Kolkata-based company, whose board on Saturday approved the divestment of its one million ton steel business in favor of Tata Steel for Rs 4,600 crore.  Courses of action: I. Proceeds will be used to ‘first repay existing lenders of the company’. Usha Martin will retain a profitable wire ropes unit as residual business, and has plans to scale it up significantly.  II. As part of the transaction, Usha Martin has entered into a five-year deal with The Tatas for sale of steel at market price to the wire-ropes business.  III. Usha Martin is among the top four wire rope players globally. With oil prices going up and strong trend in demand in Europe, the Ebitda in the wire-ropes business has improved. 
500 kg of ore contained a certain amount of steel. After the first blast furnace process, 200 kg of slag containing 12.5% of steel was removed. The percentage of steel in the remaining ore was found to be 20% more than the percentage in the original ore. How many kg of steel were there in the original 500 kg ore?
Consider the following statements related to the merits of construction in structural steel: 1. Structural steel has high strength per unit weight as compared to RCC. 2. The steel members are slender or small in size as compared to RCC. 3. The steel structures are useful in the construction of tall buildings, long-span bridges, and airplane hangers. Which of the above statements are correct?
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: No plastic is iron. All steel is iron. Conclusions: I. Some plastic is steel. II. Some iron is steel. III. No steel is plastic.
Two similar bars of Steel and Aluminium are heated to a same temperature. Forces are applied at the ends of the bars to maintain their lengths unaltered. If the ratio of Young’s moduli of Steel and Aluminium is 3, and the ratio of the coefficients of thermal expansion of Steel to that of Aluminium is 0.5, what is the stress on the Aluminium bar if the stress on the Steel bar is 100 MPa?
A steel ball (density ρsteel = 7200 kg/m3) is placed in an upward moving liquid AI (density ρal = 2360 kg/m3, viscosity μAl = 1 × 10-3 Pa.s and Reynolds number = 5 × 105). The force (F) exerted on the steel ball is expressed as F = fπR2(ρAl V2/2)
where, f is friction factor (= 0.2), v is the velocity of liquid AI and R is the radius of steel ball.
The force exerted on the steel ball is