Gross national product (GNP) means the total value of _______________ in a country ?
(A) Goods produced
(B) Gold reserve
(C) Earning of the citizens
(D) Taxes paid
Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in ______________ position ?
(A) Horizontal
(B) Vertical
(C) Inclined
(D) Any
The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
(A) T1/(T1-T2)
(B) T2/(T1-T2)
(C) T1/T2
(D) T2/T1
Blow off cock is provided in steam boiler to ____________________?
(A) Guard the boiler in case of abnormal rise in steam pressure
(B) Drain out water and sludge during its repair
(C) Regulate the supply of water in boiler
(D) Put out the fire in the furnace when the water level in the boiler falls to unsafe limit
The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?
(A) Water alkalinity & leakage
(B) Hydrazine addition during feed water treatment
(C) Release of non-condensable gas from water in the boiler
(D) Scale formation
______________ pipe is the most suitable for carrying sanitary drainage?
(A) Stainless steel
(B) Reinforced cement concrete
(C) Cast iron
(D) Asbestos cement
Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?
(A) Occurs higher in the electro-chemical series of metals
(B) Is exemplified by magnesium plate
(C) Is much cheaper than the cathodic base material to be guarded against corrosion
(D) All A,
Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________?
(A) Achieve very high purity of aluminium (99.9%)
(B) Keep the electrolyte in liquid condition by the generation of heat
(C) Electrolytically dissociate alumina
(D) Both
Holes for riveting purposes should be preferably made by________________?
(A) Cutting torch
(B) Drilling
(C) Punching
(D) None of these
Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?
(A) 9,100
(B) 13,000
(C) 7,000
(D) 2,550