Building Materials (Cement)

Q.1.     Tube mill is used in
(a)        grinding
(b)        burning
(c)        mixing
(d)        none of these

Q.2.     In the dry process of cement manufacturing, raw material is first crushed to a size of about
(a)        5 mm
(b)        10 mm
(c)        15 mm
(d)        25 mm

Q.3.     In the dry process, finely grounded cement passes to
(a)        godown
(b)        silos
(c)        packaging plant
(d)        shops

Q.4.     Match List I with List II
            List I(Laboratory tests)
A.        Vicat apparatus
B.         Le-Chatelier apparatus
C.        Slump test
D.        Turbid meter
            List II(Property)
1.         Soundness of cement
2.         Initial setting time of cement
3.         Workability of cement concrete
4.         Specific surface
 (a)       A1,B2,C3,D4
(b)        A1,B4,C3,D4
(c)        A3,B4,C2,D4
(d)        A2,B1,C3,D4  (IES 1993,95,96)

Q.5.     Setting time of cement is determined by
(a)        Le Chatelier apparatus
(b)        Vicat apparatus
(c)        Turbid meter test
(d)        none of these

Q.6.     The height of standard Vicat mould is
(a)        10 mm
(b)        20 mm
(c)        30 mm
(d)        40 mm

Q.7.     In a paste of standard consistency, Vicat plunger penetrates the sample in standard Vicat mould
(a)        5 to 7 mm
(b)        33 to 35 mm
(c)        10 mm
(d)        20 mm

Q.8.     In Vicat test, the initial setting is assumed when the needle fails to pierce the sample completely and reaches upto
(a)        5 mm from bottom
(b)        10 mm from bottom
(c)        15 mm from bottom
(d)        20 mm from bottom

Q.9.     Vicat plunger is used in determination for
(a)        initial setting time
(b)        final setting time
(c)        consistency
(d)        both (a) and (b)

Q.10.   Vicat needle is used in determination of
(a)        initial setting time
(b)        final setting time
(c)        consistency
(d)        both (a) and (b)

Answers
1. a      2. d      3. b      4. d      5. b      6. d      7. b      8. a      9. b      10. d

Comments

Post a Comment

Popular posts from this blog

Electrical Machines (Three Phase Transformers)

1. Which of the following connections is best suited for 3-phase, 4-wire service ? (a) Δ − Δ (b) Y − Y (c) Δ − Y (d) Y − Δ 2. In a three-phase Y-Y transformer connection, neutral is fundamental to the (a) suppression of harmonics (b) passage of unbalanced currents due to unbalanced loads (c) provision of dual electric service (d) balancing of phase voltages with respect to line voltages. 3. As compared to Δ − Δ bank, the capacity of the V − V bank of transformers is ......... percent. (a) 57.7 (b) 66.7 (c) 50 (d) 86.6 4. If three transformers in a Δ − Δ are delivering their rated load and one transformer is removed, then overload on each of the remaining transformers is ......... percent. (a) 66.7 (b) 173.2 (c) 73.2 (d) 58 5. When a V − V system is converted into a Δ − Δ system, increase in capacity of the system is ......... percent. (a) 86.6 (b) 66.7 (c) 73.2 (d) 50 6. For supplying a balanced 3 − φ load of 40-kVA, rating o
Read more

Thermodynamics (Compressible Flow)

1. All real fluids are (a) incompressible (b) compressible to some extent (c) compressible to any extent (d) none of the above. 2. A change in the state of a system at constant volume is called (a) isobaric process (b) isochoric process (c) isothermal process (d) adiabatic process. 3. A process during which no heat is transferred to or from the gas is called an (a) isochoric process (b) isobaric process (c) adiabatic process (d) isothermal process. 4. The sonic velocity is largest in which of the following ? (a) Water (b) Steel (c) Kerosene (d) Air. 5. An isentropic flow is one which is (a) isothermal (b) adiabatic (c) adiabatic and irreversible (d) adiabatic and reversible. 6. Indica upto what Mach number can a fluid flow be considered incompressible ? (a) 0.1 (b) 0.3 (c) 0.8 (d) 1.0. 7. Which of the following is the basic equation of compressible fluid flow ? (a) Continuity equation (b) Momentum equation (c) Energy equation (d) Equation of st
Read more

Electrical Machines (Special Machines)

1. A single-stack, 4-phase, 6-pole VR stepper motor will have a step angle of (a) 15º (b) 30º (c) 45º (d) 90º 2. In a three-stack 12/8-pole VR motor, the rotor pole pitch is (a) 15º (b) 30º (c) 45º (d) 60º 3. A three-stack VR stepper motor has a step angle of 10º. What is the number of rotor teeth in each stack ? (a) 36 (b) 24 (c) 18 (d) 12 4. If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be (a) 4 (b) 2 (c) 3 (d) 6 5. What is the step angle of a permanent-magnet stepper motor having 8 stator poles and 4 rotor poles ? (a) 60º (b) 45º (c) 30º (d) 15º 6. A stepping motor is a .................. device. (a) mechanical (b) electrical (c) analogue (d) incremental 7. Operation of stepping motors at high speeds is referred to as (a) fast forward (b) slewing (c) inching (d) jogging 8. Which of the following phase switching sequence represents half-step operation of a VR stepper motor ? (a) A
Read more