HPCL/BPCL/IOCL Engineering Assistant Sample Paper – Chemical Engineering
1. Dilute sulfuric acid is handled in vessels made of- (GATE-1989-9.i.a)
(a) Stainless steel
(b) Brass
(c) Lead
(d) Cast iron
Ans- (c)
2 ACSR (Aluminium Conductor Steel Reinforced) are used as
(a) over head transmission lines.
(b) super conductors.
(c) fuse
(d) underground cables.
Ans- (a)
3.Brass is an alloy of
(a) copper and zinc.
(b) copper and iron.
(c) copper and Aluminum.
(d) copper and tin.
Ans- (a)
4. A gaseous reaction A ! 2B+C takes place isothermally in a constant pressure reactor. Starting with a gaseous mixture containing 50% A (rest inerts), the ratio of final to initial volume is found to be 1.6. The percentage conversion of A is (GATE-1992-2.c)
(a) 30
(b) 50
(c) 60
(d) 74
Ans- (c)
5.Property of material which allows it to be drawn out into wires is
(a) Ductility.
(b) Solder ability.
(c) Super conductivity.
(d) Malleability.
Ans- (a)
6.In n type semi conductor added impurity is
(a) pentavalent.
(b) divalent.
(c) tetravalent.
(d) trivalent.
Ans- (a)
7. Phenol and Formaldehyde are polymerised to a resultant product known as
(a) PVC.
(b) bakelite.
(c) polyester.
(d) teflon.
Ans- (b)
8.The percentage of carbon in mild steel is
(a) 0.08 to 0.3 %
(b) 0.5 to 1.4 %
(d) 2.35 %
(d) 0.5 %
Ans- (a)
9. A rotameter, through which air at room temperature and atmospheric pressure is flowing, gives a certain reading for a flow rate of 100 cc/s. If helium (Molecular weight 4) is used and the rotameter shows the same reading, the flow rate is (GATE-1996-2.02)
(a) 26 cc/s
(b) 42 cc/s
(c) 269 cc/s
(d) 325 cc/s
Answer- (c)
10.Crystal size in a continuous crystalliser depends upon the
(a) rate of heat transfer.
(b) degree of turbulence.
(c) degree of supersaturation.
(d) all (a), (b) and (c).
Ans- (d)
11.When vaporisation takes place directly at the heating surface, it is called
(a) film boiling
(b) nucleate boiling
(c) vapour binding
(d) none of these
Ans- (b)
12.Fourier’s law applies to the heat transfer by
(a) convection
(b) radiation
(c) conduction
(d) all (a), (b) & (c)
Ans- (c)
Leave a Reply