Rajiv Gandhi Proudyogiki Vishwavidyalaya 2007 B.E Engineering Chemistry - Question Paper

Engineering Chemistry June 2007 ques. Paper

1. Attempt any 2 objective ques. every from A to E. (Total no of 10 ques. to be attempted):
(A) (i) Hardness in water is expressed in terms of equivalent of:
(a) CaCl2
(b) MgCl2
(c) CaCO3
(d) MgCO3
(ii) Calgary is the trade name of:
(a) Sodium silicate
(b) Calcium phosphate
(c) Sodium zeolites
(d) Sodium hexametaphosphate
(iii) Sterilization of water can be done by using:
(a) Ozone
(b) Oxygen
(c) Hydrogen peroxide
(d) Caustic potash
(B) (i) Latent heat of condensation of water-vapor is:
(a) 287 k cal/kg
(b) 387 k cal/kg
(c) 487 k cal/kg
(d) 587 k cal/kg
(ii) When cola sample is kept in open lid crucible in muffle furnace at about 725 0C temperature for ½ hour the component determined will be:
(a) % moisture
(b) % volatile matter
(c) % ash
(d) % fixed carbon
(iii) ISO-octane has an octane angle rating of:
(a) 0
(b) 100
(c) 50
(d) Above 100
(C) (i) Mineral oils are:
(a) Unstable
(b) Costly
(c) easily oxidized
(d) Poor in oiliness
(ii) Cup-greases is also called as:
(a) Axle grease
(b) Soda-base grease
(c) Calcium
(d) Lithium-base grease
(iii) Viscosity of high-viscous oils must be determined by apparatus:
(a) Redwood viscometer No 1
(b) Redwood viscometer No 2
(c) Redwood viscometer No 3
(d) None
(D) (i) A plastic which can be softened on heating and hardened on coolings called:
(a) Termite
(b) Therm o elastic
(c) Thermoplastic
(d) Thermostatic
(ii) Nylon 6:6 is:
(a) A polyester fiber
(b) A polymerize fiber

Earning:   Approval pending.