# Gas Turbines Questions and Answers – Heat and Steam Rate – 1

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Heat and Steam Rate – 1”.

1. Heat rate is used to define the efficiency of steam power plant.
a) True
b) False

Explanation: Heat rate = (Input energy)/(output power).

2. Inverse of efficiency is called as ____________
a) steam rate
b) heat rate
c) heat utilized
d) none of the mentioned

Explanation: From the formula, we can identify heat rate is the inverse of steam rate.

3. To increase plant efficiency heat rate is to be _________
a) increased
b) decreased
c) no relation with the heat rate
d) none of the mentioned

Explanation: As heat rate is inverse of plant efficiency, to increase plant efficiency heat rate is to be decreased.

4. What are the units of heat rate?
a) Kw/hr
b) No units
c) BTU/KWh
d) None of the mentioned

Explanation: Chemical energy input units are BTU and electrical energy output units are KWh. So units of heat rate are BTU/KWh.

5. Chemical energy of the fuel can be calculated by _________
a) Chemical energy of fuel = (Total fuel used) * (Higher heating value)
b) Chemical energy of fuel = (Calorific value) * (Fuel required for 1 Kcal of energy)
c) Cannot be determined theoretically
d) None of the mentioned

Explanation: Chemical energy of fuel = (Total fuel used) * (Higher heating value).
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6. Heat rate losses that can be directly effected by actions of operators is called ______
a) uncontrollable losses
b) controllable losses
d) none of the mentioned

Explanation: Heat rate losses than be directly effected by actions of operator are called controllable losses.

7. Heat rate deviation can be defined as _______
a) difference between actual and target heat rate
b) difference between heat rates at maximum and minimum temperatures
c) difference between calorific value of ideal fuel and actual fuel used
d) none of the mentioned

Explanation: Heat rate deviation can be defined as the difference between the actual and target heat rates.

8. Steam flow rate can be calculated by _______
a) 3600/p
b) 3600 He/p
c) 3600 P/He
d) None of the mentioned

Explanation: Steam flow rate can be calculated by Ms = 3600 p/He.

9. The rate at which boiler in steam turbine produces steam is called __________
a) Steam rate
b) Steaming rate
c) Heat rate
d) None of the mentioned

Explanation: The rate at which the boiler produces steam is called steaming rate.

10. Heat rate can be used to find annual fuel costs.
a) True
b) False

Explanation: Annual Fuel cost = Heat rate deviation * Fuel capacity * Capacity factor * (Gross capacity * Auxiliary loads) * Time.

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